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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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RomyThis topic is relevant to me currently as I am attempting to get a 750Hz low-pass into a valve (tube) amp that is driving a bass section ( Supravox 285GMF in an Onken cab ).I have run through a few options in my head but can see various problems....
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Well, that does not tell what sort of power your inverter wants/draws when you hook it up to your hi-fi, though it seeems like that is what you'd want to know in order to calculate how long you can listen with a given battery.Paul S...
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Good link, Kris. What is missing in the link is the RL filters. The RC Low-pass filters are fine as the capacitors are not in the band-pass mode. It is arguable what would be better – a subtractive shunting cap or a few miles of coil in the signal p...
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[quote user="Romy the Cat"]I do not care about all of Nilsson Pass amps; I feel that all the same and all are very sub-qualified. A few years back Mr. Pass went for his low-powered SS single-ended amps and they might be more interesting. The Cat[/qu...
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Romy, I appreciate that this is an old thread now and that you may not remember everything from your time developing these amplifiers, but I have a (hopefully) simple question about the upperbass crossover in the schematic above. All other channels ...
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Hi Romy, Here is my dilemma. I like the SU1tremendously. Don't laugh....I had it hooked up to aRotel Michi RHQ-10 and the combo is sounds amazingwith my cartridges. I recently was feeling itchy and bought a Pass XONO.The Pass XONO cannot touch the so...
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I am really enjoying myself here at Romys site. I like the idea of someone documenting their efforts in a very (self) critical way.I think that anyone solving issues in a methodical way uses similar techniques. They all involve stripping the problem ...
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[quote user="decoud"]Hi Romy, I imagine the coupling cap in the full range melq acts as a first order high pass filter: is there any reason why one could not lower its value to raise the cutoff to a level one would otherwise redundantly need a speake...
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I realised this morning that I have done a "not-so-standard" thing in using leftover fibreglass batts for stuffing the tubes. The batts that I have on hand are high density batts, not the low density type of fibreglass that is usually used for stuff...
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The new parts I needed to build the new crosovers arrived about a week ago, but I have been otherwise busy (for a change...), and now I've managed to get sick, so I am still only mentally toying with the project. I will try to work in some bread boar...
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Romy,Thanks for your comments but don't worry, I wouldn't lie to "shut you up". I just want to provide helpful answers to this communities’ questions and also get useful feedback :)Please see the image below for details of this:[URL=http://imageshac...
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[quote user="Romy the Cat"]Good link, Kris. What is missing in the link is the RL filters. The RC Low-pass filters are fine as the capacitors are not in the band-pass mode. It is arguable what would be better – a subtractive shunting cap or a few mi...
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Looks like I'm back into this again, since, all of a sudden, out of nowhere, Yoshi up and sent me his "neutered" Reps 1 drivers (he surgically removed the whizzers).I started turning my existing Basszilla components and these guys together ...
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Well, this is huge mystery in the reproduction of the few first milliwatt and I very much applaud to what Nelson Pass is trying to do. Being muse a proponent of high sensitively and low power I very much experienced with the fact the high power amps ...
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I thought that a digital crossover had a negative impact on sound quality -- especially for use between a midbass, midrange and tweeter channels. So I made an experiment a what I learned was not expected.I used my mid horn and two high pass filters i...
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If to look at the Melquiades schematic in the channel “A” you will see 78H first order low pass filter.
http://www.goodsoundclub.com/PDF/6-Chennal_Melquiades_DSET_Amplifier.pdf
The low-pass filter in Milq and the low-pass filters generally is great...
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I think I found a good configuration for de-emphasis. The air caps will not work as there is nothing to amplify the capacitance. RC filer with cap to ground is good but I would like to have the entire de-emphasis with no capacitor at all, it will be ...
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[quote user="anthony"]Romy, I
appreciate that this is an old thread now and that you may not remember
everything from your time developing these amplifiers, but I have a (hopefully)
simple question about the upperbass crossover in the schematic ab...
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I have no doubts that it will work but I would like to understand HOW it works.
The objective it to have first order filter, of cause not the filter where capacitance do high-pass roll off but RL. In RL filter there is not reactive elements i...
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Plenty of theoretical problems at every turn, but is the R from thick wire really that important? Likewise, I am not sure of special/worse probems from iron core chokes, although I am aware of hysterisis as a theoretical problem.I am in no posi...
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In my idea pass labs high power amplifiers are in under average even in comparison by market average standard.it's sound xa1000 was not good and i think when a company accessed a good market for his products then start to making crap products.in my i...
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>>Gera, are you catapulted from another planet? Are you sure that you want to drive a mid horn with Rowland amp?
Romy, some people that know me will say "yes", I am not sure... Of course no, not the Rowland to drive my horns, this is the amp ...
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N-set, it is nice to see that you are keep punching the idea, somebody shall, I guess.. About the filters. For the low-pass and in this application I do not use inductors and much prefer RC filter. In LC filters the band-pass flows over coil. If we a...
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It is really a seldom thing in audio – when people ask questions afar they do own homework and demonstrate understating and own thinking on the subject.
Question: Whan bass horn back chamber tuning should be started? &nb...
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Surprise, surprise it is from Pass Labs and the model name RS1. I have no other comments besides the visual appearance of the RS1 loudspeaker and I find the RS1 being remarkably elegant, functional and beautiful. I was thinking something simila...
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[quote user="Romy the Cat"]I think it might be very interesting to introduce the high-pass filtration for tapped horn and to see how it behaves. It is not only about thermal overload and restriction of excursion. The unloading of none-used bass gener...
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i do it and i did it, but as a newcomer you have to sort out all the infos...not that easy!
[quote user="Romy the Cat"](This is normal, I have written about it many times. Those large bass drivers have a lot of inductance in Voice Coil, the inductan...
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[quote user="Romy the Cat"]The events of the last 3 days are incredibly stupid, incredibly interesting and very educational. During the last few days I have discovered some very interesting phenomena, ok might be no a phenomena but a behavior, th...
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I was searching for an answer why squire wave is so screwed and I was advised by the site’s visitors that it is due to HF restriction of my channel. My HF response does look too low to me – the 23kHz; with all my ultra low capacitance magnetic I ...
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The precision of those inductors is very much irrelevant – it would be easy to fine-tine the filter with the value of the resistor. There is a bigger fish to fry – the benefits of LR filter.
If we are taking about high-pass filter then there are no ...
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