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In the Forum: Melquiades Amplifier
In the Thread: 5 Channel Version of Melquiades
Post Subject: Re: Melquiades - think BEFORE you start.Posted by Romy the Cat on: 7/24/2006

 jessie.dazzle wrote:
There are a few good shops in Paris that have shelves and drawers full of components. And, across the channel ….
Yes, you might experiment with transformers.  Sowers have good reputation but I never used them and have no idea what they are. Lundahls have own beauty as the are small, not really expensive, available, sound good with amorphous core, have a very flexible and very comfortable asses to the sections of the secondary that you will find very useful, have a very wide range of possibilities the your also you to configure a transformer with less turn and lower primary inductance for HF channels. Still, perhaps smoothie is more interesting in there. I did not try multiple transformers: I got the Lundahls and was quite comfortable with the result. Since you live across the pond you might try Tribute transformers:

http://www.tribute-audio.nl/

However be advised that all that wisdoms about the “good reputation” worth very little. People prefer one of another transformer primary in context of a full range transformer, as any SET transformers is juts a compilation of compromises. However in context of DSET, when you have a dedicated narrow frequency range transformer for each channel then rules of the game are different and you might go away with much simpler transformer and get much better result at the same time. You just do not care about the bandwidth of the transformers anymore.

 jessie.dazzle wrote:
Regarding the architecture of the 5-Channel beasts : I should start off by confessing that I am not at all an electrical engineer. I will need to think and ask advice regarding the details. In the prototype stage, though it might be more costly, I have a strong preference for keeping things as direct as possible, dedicating components to only one channel. This approach has the advantage of being easier to get one’s mind around exactly what he might be doing.

Hm, if I were you I would go for horn first. Then you will see what channels you might need. I personally do not feel that you it really make sense to make 5-chanls DSET if you wish do not lower then 40Hz. For instance I run MF and tweeter from the same channel with a transformer of 1.5H inductance. You have to have reasons (crossovers, drivers and so on) to isolate the drivers to desiccated channels and it is not necessary should be 1:1. For instance I will be considering to drive my “fundamental canal” from my current upperbass channels and I will go for a separate amp ONLY if I see/hear the benefits. Perhaps the benefits will manifest themselves (crossover + ability to drive the channels with different current = manage the transients) but how critical it would be? The more you go up in the frequency the less critical it will be. The 3 of your channels will be over 1000Hz and they might be integrated (if the crossovering allow to do it painfully)

 jessie.dazzle wrote:
For cooling, I will need to consider the fact that I live with two cats (yesssss), and a fan would likely require an external filter, (which could also serve to attenuate the fan noise). Because I am less interested in keeping things compact, this should not be a problem.
Absolutely, the foam filter is very necessary and the cost $1.70, including the filter holders. I use them everywhere and clean then one in few month.
 jessie.dazzle wrote:
Could you send the list of “Approved Parts” (and where to get them) for construction of a pair of standard Melquiades.
I would like to keep everything open public and do not sent message that Melq might use some Approved Parts. There is nothing “special” in there and I do not believe into “making sound” but selecting of different sounding parts. I feel it is what Morons do and I am not.  Look at the paragraph  “Some Specification comments” on the Melq’s page:

http://www.goodsoundclub.com/Melquiades.aspx

Rgs,
Romy the Cat

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