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04-30-2007 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-27-2004

Post #: 1
Post ID: 4296
Reply to: 4296
My feelings about new exciting audio products

I kind of feel that I am way off in my familiarity about what is going on with new audio products. My horizon is very restricted with my own needs and with my own interests. I am irregularly read audio publications and irregularly visit some audio sites and although I do monitor what is going on out there but not as carefully as I use to in past. It is not that I am sweepingly against any commercial audio products as a concept as many idiots-DIYers are. It is juts the most of the audio products that I have seen out there in their performance are way beyond the level where I would found them worth attentions. Therefore, I’m not wasting my time to monitor the new crap that keep coming to the market monthly.

Still, even with my very limited attention I would like to note some new audio products that I would welcome and would have interest to see.

In analog I do not see any interesting tendencies in turntables or in tonearms. The new expensive turntables and tonearms do not impress me and I do not particularly like their design approaches. I would like to see some light TTs that would be not-ported bass able but I do not see anyone talk about it….

In phonocorrectors I feel there is a large unfulfilled gap in the high level performers. I very much, to my big surprise, loved the expensive Boulder 2008 when I played with it a few years back but I never had it in my own listening room. It would be interested to try it… A few years back a Swaziland company DaVinci Audio made their MM LCR corrector. It had a number of very appealing solutions and I found that it was a very interesting product. I think since then the DaVinci Audio becaume more or less “for profit” company and the corrector that I was talking about got converted in a simplified commercial version. How good is it ?  I do not know but it might be fun to try it… The British’s Thorsten use to make interesting low impedance LCR phono filter and he promised to make then in it’s 10K version. If he did and someone put them between gain stages then I would be very interesting product to try as well….

In digital the general tendencies are way out of my interest. The SACD is a fraudulent crap and it looks like the industry is got consumed with SACD back hole. The commercially available DVD-A are not good as well. The same Thorsten made up a new company, I think the Abington Something and they make a new 16/44 CD player. I did not hear it and I look forward to it, I will have a local guy to have one soon, – it might be interesting. The Ayre Acoustics I heard have a new CD player – I always like what they do and it might be worth to see in which direction the Ayre’s played gone. There are a lot of new exciting DACs out there. I anticipate that it is the time for very good sounding DACs for sub $500 pop up here and there - I did not many any evaluations in this direction but I would not be surprised…  BTW, the Australian’s Kostas ADC sounds very promising... Perhaps he has an equally interning performing DAC….

In electronics my needs are very limited – I need an absolutely transparent preamp (and I have one) and a low powered DSET. The stupid industry does not even look at the DSET direction, so I do not see anything worthy. In the full range amps I also see no interning low power contenders - I understand why – there are no capable high sensitivity loudspeakers. With all Advantage imperfections the Trios were sensitive and they were the only one commercially successful product. If more products like this were available then the marker would birth some interesting low power solutions. However, with Jim smith dropped the operation the Advantage in a deep shit and they went to a bogus shadow of stupid products and marketing nothingness. I do not see that any powerful amps out there worth anything as I do not see any commendable loudspeakers to use with powerful amps.  Also, my personal visiosn about amplification are severally corrupted by Melquiades that in my personal way “out there” in relation to any other amps that I heard. In the preamps I found that Lamm long-promising new line-level amp (I think it will be called Lamm L3) will be extremely interesting to watch. If Lamm would be able to make it absolutely transparent and at the same time to preserve some of the amassing and unique sonic qualities of his L1/L2 had then it might be a phenomenally exciting preamp.

In loudspeakers I hardly see a lot of excitement. The British’s Mike threatens to reintroduce Vitavox – it might be fan but it should be seen how good it might be. The Cogent boys might found some civilized horn-maker and improve their installation to a “demonstrable level”. I do not know how about the “excitement” but they do might be worth to watch in future, primary because no one is trying to make compression drivers but they do try.  I hope the Cessaro Acoustics Company from Germany gets this US representation and their “Gamma” model will be available for auditioning. It might be very interesting and would not mind to pay some price for the auditioning admission…

One of the greatest area where a lot of done but with zero success is the power treatment – the electricity still is the main bitch of audio in my world. Well, I should not say that what among what is done everything has zero success but whatever I have seen was not what I would like to have. The power line devices come to the market like the mushrooms after rain but I still do not see anything radical (like a dynamic decoupling of anything like this). The power devises is the area where I would like to see something drastically improved…

Rgs,
Romy The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
05-24-2007 Post does not mapped to Knowledge Tree
SearcherOfBetterSound
Posts 16
Joined on 04-25-2007

Post #: 2
Post ID: 4446
Reply to: 4296
Turntable interest, digital thoughts
Why is Acoustic Solid so interesting to me? Well, it should be to most when you read stuff like a $1,600 Black Wood Classic model can beat out a $5,500 Super Scoutmaster model from VPI, and a $4,000 Solid One can compete with a TW Acustic Raven and a Verdier La Platine which can cost over twice as much. It's not just about beating out respected companies, it's just there has to be some great technical/sonic standard and scientifically/sonically advanced ideas AND, gasp, real price value implementation materials worth, marketing worth, whatever's worth, if the value is really THAT high. I get the feeling high-prices on turntables just isn't the same worth of investment as a good digital whatever...why waste thousands on it even it's better, when digital needs it more and there's a lot of CDs out there. For me, I'd probably spend $1,600 on phono, and $4,000 on digital, but I suppose I could do with around $2,000 digital....$4,000 total sources? yeah man! I wouldn't be too surprised if the Black Wood Classic would be worthy replacement for Romy's turntable setup. Acoustic Signature is related to this company too, but I've not read much about them.

On digital I'm just writing to say that I wanted to know what Romy felt on computer digital, and didn't see enough on it for some time, but I did find some old posts a bit ago and it appears that it didn't work out as good as his transport. This is for others to know, remember, consider. I guess it makes sense as the digital inspiration at Wavelength's website did only mention they used an around $10,000 transport as reference, and Romy's CEC is probably better, his whole system has to be better too. Point is I would trust to not get too enthusiastic over computer storage especially since it's harder and more expensive to do then it seems, but it's realy the hard part that makes it like that especially. Perhaps a cheaper storage can be a better value than cheapish players (perhaps DACs are more efficiently transparent to them), but for high-end, people still need more trustworthy comparisons. Now if only Romy had some Nova Audio Physics player and Empirical Audio help...
05-25-2007 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-27-2004

Post #: 3
Post ID: 4453
Reply to: 4446
"...Cheaper storage is better value than cheapish player" and blah-balh-blah....

 SearcherOfBetterSound wrote:
Why is Acoustic Solid so interesting to me? Well, it should be to most when you read stuff like a $1,600 Black Wood Classic model can beat out a $5,500 Super Scoutmaster model from VPI, and a $4,000 Solid One can compete with a TW Acustic Raven and a Verdier La Platine which can cost over twice as much. It's not just about beating out respected companies, it's just there has to be some great technical/sonic standard and scientifically/sonically advanced ideas AND, gasp, real price value implementation materials worth, marketing worth, whatever's worth, if the value is really THAT high. I get the feeling high-prices on turntables just isn't the same worth of investment as a good digital whatever...why waste thousands on it even it's better, when digital needs it more and there's a lot of CDs out there. For me, I'd probably spend $1,600 on phono, and $4,000 on digital, but I suppose I could do with around $2,000 digital....$4,000 total sources? yeah man! I wouldn't be too surprised if the Black Wood Classic would be worthy replacement for Romy's turntable setup. Acoustic Signature is related to this company too, but I've not read much about them.

On digital I'm just writing to say that I wanted to know what Romy felt on computer digital, and didn't see enough on it for some time, but I did find some old posts a bit ago and it appears that it didn't work out as good as his transport. This is for others to know, remember, consider. I guess it makes sense as the digital inspiration at Wavelength's website did only mention they used an around $10,000 transport as reference, and Romy's CEC is probably better, his whole system has to be better too. Point is I would trust to not get too enthusiastic over computer storage especially since it's harder and more expensive to do then it seems, but it's realy the hard part that makes it like that especially. Perhaps a cheaper storage can be a better value than cheapish players (perhaps DACs are more efficiently transparent to them), but for high-end, people still need more trustworthy comparisons. Now if only Romy had some Nova Audio Physics player and Empirical Audio help...
Well, searcherofbettersound

I do not feel anything about computer digital, and frankly speaking I do not exactly understand your posts, if I read them. I do not exactly “get” what you want. To course across the web site  picking superficial information and to built in your mind a virtual hierarchy of what might be “better”...  is it your definition of “being in audio”? You might spread your thinking about the quality of cooking knifes but how valuable it would be if you do not cook and has no habits or desire to cut food. Perhaps I am getting a wrong message in here, and if so then my apologues but I do not see in your posts a lot of compliance with the subject of “evolved music reproduction techniques”.  Please, do not take my reply as a criticism but rather as an optometry for yourself to nail down what you are doing.

Rgs,
Romy the Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
05-27-2007 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-27-2004

Post #: 4
Post ID: 4467
Reply to: 4446
Spectral SDR-4000 CD Processor
 SearcherOfBetterSound wrote:
Not released yet though. They are an interesting company to me and whether or not their products are acceptable to you or me or not, they at least talk about some of their experiences and knowledge and tech on products more than a lot of other companies, or specifically in a reasonable and casual enough way... Taking in mind them and Nagra and some other companies, the highlights are probably the transports, and are the specific things to take notice of and consider all-around. They say CD doesn't play as good on more universal-like sources, yet their players have HDCD compatibility, so it makes me think about it and it does make sense..other formats/player-types are probably too different, but HDCD may be the most similar to CD which allows it to play well. Their new player costs around $20,000 like other top transports (a big increase from their $10,000 model which is the only other model I know of from them). But since this can play HDCD, that could possibly be the breaking point in deciding to get it over a Nagra or whatever other player, assuming of course that specifically CD is done right. I have no idea how it looks like or anything, I just read that it premiered at CES recently and what it's price might be.
The Spectral digital is very interesting. It is VERY highly performing but hardy musical. I had Spectral transport with this 2000Pro processor it was extremely good but had Sound that I hardly might call as anything else besides naming it as “mechanical sound”. With all Spectral setup + MIT + the entire Spectral philosophy setup it might be semi-OK and almost properly perfectly “balanced” sounds-wise but it hardly could be not musically interesting.

A spectral new transport? Is it exciting?

http://www.spectralaudio.com/sdr-4000.htm
 
I do not know. Those companies do a new product in line once in tree years in order to keep the dealer and customers “stimulated”. I think until the Spectral marketing campaign will be able to say WHAT WAS WRONG WITH THEIR SOUND in thier provisos model I see no reason to extend them a credit with their new model.


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-23-2007 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-27-2004

Post #: 5
Post ID: 4659
Reply to: 4296
Dick Sequerra’s double paper monitor.

Dick Sequerra it looks like made his new monitor available: Met 7.7 Mk. 6

http://www.sequerra.com/

It uses looks like a custom paper woofer and a custom paper tweeter, both geometrically naturally aligned, behind first order crossovers, unfortunately sub 90dB sensitivity. I never heard this monitor but the direction Dick went certainly is very perspective. I think if the opportunity comes then this monitor should be heard.


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-25-2007 Post does not mapped to Knowledge Tree
morricab
Posts 51
Joined on 07-13-2005

Post #: 6
Post ID: 4667
Reply to: 4296
Cessaro speakers and some other tidbits
Hi Romy,
I recently heard the smallest Cessaro and while I felt that the bass was not adequate for long term satisfaction it was also not a total disaster.  From the midbass on up; however, the speaker is simply superb and one of the very best horn designs on the market.  There was a distinct lack of the usual horn colorations that are almost always present in most horn designs.

Other interesting horn/hybrid designs that I have heard recently that sparked a lot of interest for me:

1) Lansche Goa .  This speaker is using a horn loaded plasma ion tweeter and a horn loaded compression driver midrange (sorry don't know exactly what driver it uses) along with a dual 12" isobaric powered subwoofer.  For me this was the nicest sounding system in a somewhat compact format that I have heard in a long time.

2) Odeon No. 32  Hornloaded tweet and mid (in nice wooden spherical horns) with vented woofer system.  Fast and uncolored sounding and quite dynamic as well.

Non horn speaker worth checking out:

Apogee Synergy.  Apogee has been resurrected and now made in Australia.  Their first fully new product is in the classic design of the Apogee Scintilla but with some major differences.  First it uses lighter weight ribbons.  Second it uses Nd magnets to achieve a sensitivity of 95db / watt.  Third it is a less difficult 2.5 ohms (the original Scintilla was a punishing 1 ohm and unfortunately sparked the design of massive SS amps to drive them at all) , which while low is flat, meaning a decent tube amp can drive them no problem. 

Amplifier brands that you should take notice of:

KR Audio Electronics

The KR Audio DX monoblocks were driving the Cessaros at the Munich show and these amps provide for extreme dynamics and an uncolored and transparent window into the music.  Incredible control in the bass (never heard bass like this from a SET) even compared to many big SS amps.  Decay and harmonic content of instruments seems to be about spot on. The same basic sonics can be had at all levels for KR audio products because the design philosophy is exactly the same for all products.

Vacuumstate

This company is making the closest I have found to the perfect preamp and has an especially good phono corrector built in.  In fact this is basically a phonocorrector with provisions for line level sources.  There is a a lot of very innovative thinking in this design about how to achieve linearity without negative feedback.  Also very innovative is the voltage regulation scheme (it is a unique scheme designed by Allen Wright the companies founder).  

Their amplifier design is also quite innovative as they have found a way to keep two tubes correctly biased even under dynamic conditions, thus eliminating most of the problems with push-pull amplifier design.  The amp is using 2 300B tubes in what Allen calls a "differential" amplifier.  It makes 18 watts.

Monarchy Audio

Their recent release of the SE160 and SE250 hybrid monoblocks are interesting for two reasons: 1) The design is extremely simple with just one tube stage and then the MOSFET output stage.  They are zero feedback and run Class A to 50 watts.  They have a harmonic distortion spectrum that looks very similar to the better SET amps on the market.  2)  They are CHEAP (as in $2000 a pair for the SE160s and $2500 a pair for the SE250s)


DAC that is great and doesn't cost much:

Monarchy Audio M24 DAC

Again very simple design.  No opamps and no transistors only a tube output stage (SRPP) used in conjunction with some passive parts to make a low pass filter.  However; it is not a non-oversampling design and it implements the Burr Brown DF1704 8x oversampling digital filter and interestingly uses the Burr Brown PCM63P K 20bit DAC chip.  I/V conversion is done passively.   This DAC has a very organic and smooth sound but is not lacking in detail or dynamics.  Resolution is also extremely high.  Cost?  Can be had new for $1000.
06-25-2007 Post does not mapped to Knowledge Tree
coops
London, United Kingdom
Posts 115
Joined on 02-15-2007

Post #: 7
Post ID: 4668
Reply to: 4667
Munich Show
Brad Hi, I agree with you regading the bass of the Cessaro's in that Munich room, there was  severe bass suck out, perhaps if you are ever over here you must pop in, I have been tryingto listen to a Vacuum State pre  ( without buying one ) is there any demo examples? I would have sent you a private message but I can't seem to find the facilty on Romy's site, Keith.
06-26-2007 Post does not mapped to Knowledge Tree
morricab
Posts 51
Joined on 07-13-2005

Post #: 8
Post ID: 4669
Reply to: 4668
reply

Hi Keith,

Great to hear from you.  I will try someday in the near future to get to over there.  Perhaps the hifi show in Heathrow?  Hmmm...did you try contacting Vacuumstate directly about a possible demo?  As you probably know they are a very small company with probably not a lot of pres on stock I can imagine.  You can contact me directly at morricab@hotmail.com
Cheers,
Brad

06-27-2007 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-27-2004

Post #: 9
Post ID: 4672
Reply to: 4667
Vacuumstate, Cessaro and the "differential SET"...

Thanks, Brad, interesting feedback about the Cessaro.

It hard to look at bass within the show’s hotel rooms but since Cessaro use “closed bottom” topology for their LF solution it always, at lest in my mind, will be a room for improvement in Cessaro’s bass. What is interesting that Cessaro really do not do anything good or special - they juts, it appears so, do not do the wring things. I always say – the horns are very smile – juts do not do stupid things and the result will be fine.

I never heard the Vacuumstate. A pair of 300B in the “differential SET” application… Hm, would it sound different then a regular 300B? Juts kidding… The last “SET tandem” that I head was with a pair of 6C33C in “differential SET” pushing 45W. The amps were made by Vladimir Bazelkov, who runs a company Audio Mirror.

http://www.audiomirror.com/

I do not know is too welcome this approach, I think paralleling the output tubes to get more current is better solution (the one that I do not like as well). Bu since people have no high sensitively acoustics, then what kind options do they have?....

Rgs, Romy


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-27-2007 Post does not mapped to Knowledge Tree
coops
London, United Kingdom
Posts 115
Joined on 02-15-2007

Post #: 10
Post ID: 4673
Reply to: 4672
closed bottom!
'Closed bottom'?
06-27-2007 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-27-2004

Post #: 11
Post ID: 4675
Reply to: 4673
A “lowest octave horn” is an oxymoron.

 coops wrote:
'Closed bottom'?

Look for the James’ thread about “Barn Conversion” :

http://www.goodsoundclub.com/TreeItem.aspx?postID=3663

we were taking there about the “opened bottom”  and “closed bottom” solutions. The Cessaro’s LF is horn loaded. Do not forget the horns do not “load” frequencies that are lower then the size of the mouth allow them. it is possible to get out of bass horn frequently lover then the horn rate. Altec did it with 515B driver and back-chamber with port but it is VERY different sound.

So, the Cessaro’s LF horns looks like have no more mouth opening that might support anything lower let say, then 60-70Hz. What happened next? Next we have an excessive polluting exertion of driver and a huge compressed boom coming from the horn mouth. You see, a properly operating and sounding bass horn should be high-passed and half octave (deepens of the slope) below the mouth’s rate. It will be high-passed by the horn mouth anyhow, but it is nice (for sound) to unload bass before the mouth’s high-passed kick in.
So, what we have in care of the Cessaro’s LF? We try to make bass section but we in the environment when bass should be …. high-passed. Very nice, thank you! It is what I call “closed bottom” bass salutation as bass by the nature of the topology does not allow itself to be developed free to it’s natural bottom. When you put a bass horns in “active zone” of you room:

http://www.goodsoundclub.com/TreeItem.aspx?PostID=4421

then the room might still suck in another octave or two but the bass bins are high-pass itself out… not good at all… If I use something like Cessaro Gamma then would put a low-passed resonator at the bottom that would kick in at 30-40Hz….

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-27-2007 Post does not mapped to Knowledge Tree
morricab
Posts 51
Joined on 07-13-2005

Post #: 12
Post ID: 4676
Reply to: 4672
not parallel SET
Hi Romy,
The Vacuumstate amplifier is not a parallel SET it is basically like push pull but with some kind of trick dynamic bias control that keeps the tubes really together.  Much of the low level information that gets lost with the usual push pull is lost in this transition between tubes mainly because the tubes biases are changing and they no longer match up properly.  Vacuumstate has figured out how to keep them extremely close together so that they retain the strengths of SET in a "differential" design.  You can read about it on their website http://www.vacuumstate.com/
Cheers,
Brad
06-22-2008 Post does not mapped to Knowledge Tree
RonyWeissman
Lyon, France
Posts 138
Joined on 05-29-2004

Post #: 13
Post ID: 7649
Reply to: 4296
Hybrid Amps
Hi,

Have peope heard any of the new generation hybrid amps out there? I have often such miserable power to my home that about half the time it was useless to listen to my SET tube system. I always had a back-up solid-state amp to use when I could be bothered to change the cabels (threshold stasis or early jeff rowland or even an old McIntosh monster which was pretty good).  At least with those amps I could always listen, though each of them had fatal flaws.

Recently I bought my first hybrid amp, and I am not sure that I will be looking for another other amp for a very long time.  I will not write review here, but my S2s are doing tone like I have never heard like they swallowed a vintage tannoy (that fat sound) while keeping their S2 palette of infinite colors that make you understand why someone goes to all that trouble to learn how to play them. 

And another good thing is that I really do not feel need for tweeter.  The Musique concrete horns that I use seem to be able to work high enough to let me take out my EV T-350S from the system. My SET tube amp obviously had flawed high end, though of course I was crossing over way to low to use my EVs correctly, I will try again later with 12.5k xover and see if they help out or not.

Last but not least, it could care less about the state of the electricity, it is amazing every time I turn it on.  I just can't get the smile off my face. 

Well that is my idea of electronic improvement! I am sorry for long post, but maybe the hybrid solution is worth pursuing for a 2nd amplifier for those of you with awful electricity?

R Weissman
06-22-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-27-2004

Post #: 14
Post ID: 7650
Reply to: 7649
The hybrids and electricity?

Rony,

There are two possibilities as I can see them.

First is that your new hybrid amp just simply better then you former amp. Between us in case of Threshold, Jeff Rowland or McIntoshes it would not be so hard to come by to a better am, not to mention that nether Threshold, Jeff Rowland nor McIntoshe shell driver compression driver to begin with.

The Second possibility is more interning – it is possible that something in your new hybrid amp makes audio more immune to bad power (electricity). If so, then it makes sense to know what amp it was and try to speculate what in this amp might be responsible for this result. BTW, I have two new promising electricity-battling devises are coming…

I would keep your comment about benefit of a tweeter for S2 - I think you might revise your view about it. As you remember I went over it multiple times myself – though I do agree that even without any tweeters and VERY good electricity the top of S2 is very sufficient and very musical – might be even more interesting with a right tweeter.

Rgs, Romy


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-23-2008 Post does not mapped to Knowledge Tree
RonyWeissman
Lyon, France
Posts 138
Joined on 05-29-2004

Post #: 15
Post ID: 7653
Reply to: 7650
Hybrid (Tom Evans)
Hi,  yes i agree that my solid-state amplifiers were not best choice for compressio drivers, they were my second amps when electricity was bad, otherwise I use a custom made 300B from La maison de l'audiophile for my system when electricity is very good... I am comparing my new hybrid to the sound I was getting from the 300B, or other tube amps that I have heard in very similar systems to mine.

The Hybrid is a Tom Evans Linear A, there is very little information on the website, however your 'favorite' reviewer Sarajan Ebjen at 6moons has taken some pictures and discussed the tech layout in his 'review'.

R Weissman
06-23-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-27-2004

Post #: 16
Post ID: 7655
Reply to: 7653
The Tom Evans' Linear amplifier.

 RonyWeissman wrote:
Hi,  yes i agree that my solid-state amplifiers were not best choice for compressio drivers, they were my second amps when electricity was bad, otherwise I use a custom made 300B from La maison de l'audiophile for my system when electricity is very good... I am comparing my new hybrid to the sound I was getting from the 300B, or other tube amps that I have heard in very similar systems to mine.

The Hybrid is a Tom Evans Linear A, there is very little information on the website, however your 'favorite' reviewer Sarajan Ebjen at 6moons has taken some pictures and discussed the tech layout in his 'review'.

R Weissman

Rony,

I printed the Jeff Day’s review and glanced over it in train. It appears to me that there is absolutely nothing in this amp that would make it to behave better in case of bad electricity. Reading my site you might imagine that the calms of Toms’ amps immunity to bad electricity go my attention right the way. I presume that your old 300B and other tube amps were juts very bad - a common tendency and we know that your SS amps were not useful as well.

What the Tom Evans’ amp does now to S2, all that “palette of infinite colors” and transients like no other compression drivers is pretty much whet any S2 user get with use of a properly sounding and suited for a duty SET. The Tom Evans Linear’s amp looks like a right amp. It is basically a low power SET with EL84/6P14P in output. Tom paralleled the out tubes to drive the composite plate impedance lower and get some power output transformer. It is legitimate and it offers even some flexibility – if you would like to change plate loading outside of the offered taps you might pull some tubes out.(Is the filaments supplies and some other thing would permit it).

Anyhow, it looks like a nice amp and I am glad that you got eventually out of S2 the sound it meant to do, your relation to tweeters is an indication that Tom Evans’ amp might have good sound – but I think you need to leave longer with it to make more concussions and observations.  It would be fun to read more about the Tom Evans Linear SET. I did not read the Jeff Day’s articles deeply and juts snatched a few phases here and there but what I read did not please me. Jeff said:

“Another innovative aspect of the Linear A is the use of two separate power supplies to power the input and output circuits. “

Is it in a two stages-amp with op-amps as drivers and tubes in output?  No kidding! What else would be considered as “innovative”? The use of metal-base hook up wires? The use of DC on tuber anodes? The use of electricity? Anyhow, it is not uncommon that Sarajan’s boys are losing themselves in their desire to show own skills of “serving public”, I guess we all use to it. Congratulations with getting eventually something that looks like a good power amp. I will read the Jeffs’ articles more carefully as time permits…

The caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-23-2008 Post does not mapped to Knowledge Tree
RonyWeissman
Lyon, France
Posts 138
Joined on 05-29-2004

Post #: 17
Post ID: 7659
Reply to: 7655
Hybird (no magical fix)
Oh well sorry for the false lead, you are probably right that there was just something falty in my 300B but at least I found an amp that I really like.

Since i have two outputs on my preamp(placette) maybe i'll look around for a cheap flea-power tube amp and try that on the S2s and let the hybrid drive the rest. 

It's very annonying that the reviewer in the 6moons treats every part of the amplifier as 'innovativ', it is hard for those of us that don't build amps to get a decent education from the press.

R Weissman 
06-23-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-27-2004

Post #: 18
Post ID: 7660
Reply to: 7659
The Maginot Line of amplification.

It is very much might not be a false lead. I did not read further the article but on the first glance there is nothing wrong with that amp – it perfectly maybe a good-sounding amp. It has what is necessary – no SS in output stage – a big must for any low-mass loudspeaker drivers. So, it might work out fine.

The important point that I would like to stress is that your former 300B amp was very faulty and there are pure methodological evidences of it. An ordinary sounding amp but properly operating must not have such a huge difference as you describe. A regular simple 300B amp shell not eat S2 sound all together. The Tom Evans’ amp might be better but not at the point of “no colors” vs. “full of colors”. So, I am very convinced that your old amp was just not designed or was operating properly.

The caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
01-19-2010 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,545
Joined on 05-27-2004

Post #: 19
Post ID: 12735
Reply to: 4296
The Read-Only Flash Cards?
fiogf49gjkf0d
I wonder what this format does not get popularity. Pretend you get 88/44 of raw PCM WAW file on 2-6Gig Flash Card that was recorded for you by DG, RCA or EMI and would cost as a new CD? Would it be the perfect audio media? Thos solutions are show up here and there but do not get too much traction for now… Very unfortunate….

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
03-10-2010 Post does not mapped to Knowledge Tree
Vasyachkin
Brooklyn, NY, USA
Posts 47
Joined on 10-16-2008

Post #: 20
Post ID: 13125
Reply to: 4296
Power Conditioning not the way to go
fiogf49gjkf0d
 Romy the Cat wrote:
One of the greatest area where a lot of done but with zero success is the power treatment – the electricity still is the main bitch of audio in my world. Well, I should not say that what among what is done everything has zero success but whatever I have seen was not what I would like to have. The power line devices come to the market like the mushrooms after rain but I still do not see anything radical (like a dynamic decoupling of anything like this). The power devises is the area where I would like to see something drastically improved…


i believe that power conditioning, filtering or buffering is not the answer.  the answer is properly designed components which are able to tolerate garbage power.



think of it this way: what is more logical - to work on improving car's suspension or to demand that every road be machined out of marble and calibrated with laser interferometer ?  one approach would cost thousands while another trillions.



because some parts of the circuit are more sensitive to power quality than others and it is up to the designer of that component to shield the individual parts of the circuit from power problems as needed.  most manufacturer don't bother because it makes no sense from the bottom line perspective to spend any more effort on design that the absolute minimum they can get away with.



and of course if you're DIYing your own amplifiers etc then you don't have the time or resources to bother with this either and in that case it makes more sense to look for some kind of a power conditioning solution.



but ultimately the problem is lack of availability of well designed components, and the need for power conditioners is only a symptom of that problem.i do agree that it is pathetic that in this 21st century even with upscale gear i can sometimes get weird noises come out of the speaker when somebody is calling my cell phone.  we should be able to do better than that.



also i don't think the situation will improve any time soon.  because most are content with recycling 20 year old designs while electromagnetic noise pollution is only going to keep getting worse.



i remember reading about how some morons at MIT were very excited that they developed a way to power a light bulb wirelessly across the room and i was thinking those people should have been aborted.  with all the electromagnetic waves already around us the last thing we need is our neighbors powering their household appliances wirelessly. 


visit my site:

http://www.diy-av.net
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