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In the Forum: Horn-Loaded Speakers
In the Thread: Deep End DIY - Australian take one Macondo.
Post Subject: The Milq LF amp is never wasted.Posted by Romy the Cat on: 4/6/2017
 anthony wrote:
This is excellent information Romy.  I have been worried about crossing the woofers at 100Hz and would be much happier if I was able to cross them lower.  We will see how everything integrates into the room and if I do need the extra channel for mid-bass.  I have allowed for it in the design so far, but just have not actually designed such a channel.
Well, it is kind of self-ajusting believe me or not. You see in your amp the max gain you will need from you LF channel, so it will be having the maximum gain compared to other channels that will be attenuated. As you have your LF section (the tower of tubes) in place and connect it to your LF section you will be able to see what gain your playback has in your specific room. You will line up the rest of the channels and will have witness what the level of loudness you will have and if it is enough for you. They you will see how your LF is rolling off. The LF will collapse first but it will be all depends of your room. My first room was about 400sq feet, my second, in the house with bass horn was around 650sq feet and my current around 600 sq feet. My last two room had open floor plan with a lot of potential for LF to escape, so I need to put a LOT of power into LF bass to EQ the room. In my first room that did not have open floor plan it had a very good result by crossing at 107Hz second order of 73Hz first order. The uppercase was at the reference level with the rest of the horn and the room gain did wonder with lower bass. I was able to accomplish it all with one amp and one channel (Per side). That was the idea to use 6C33C what with 15W and 6 driver per side was able to operate very comfortably in class A1. I even had a room to play with idling of my LF amp and I think I made it to run 4R or something like this…
 
How about the self-ajusting. In the consecutive rooms the power and gain of my LF channels was not enough to drive my LF to cover the whole 3 octave at the bottom. So, on my former room I used the LF channel to drive my bass horns (attenuated) and in my current room I use the LF channel to drive my midbass module with Vitavox 15 tandems. Naturally in my current and former rooms the LF line array become ULF channels and require a different application which is way more powerful then what Milq can offer. So, as you can see the Milq LF channel is never wasted. In a small and sealed room it can act at LF channel and in a big and open room it doe fine was upper bass channel.

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