So when do we get to see pictures and specs on this new unit? It's not listed on the products page yet.

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Matthew J. Hill
matt@idsi.net

I asked this for the 755 too, so I might as well add it here too. ( 5 + 1 + 1 = ... 7 ! )

How big is the transformer? How much total capacitance? How much dynamic headroom?

May be very interested in this product. I currently use a Marantz MA700 to power an SVS CSultra. Wondering what the 4ohm would be? Dimensions of the unit and specs would be nice to know too.

[This message has been edited by werner52 (edited November 22, 2002).]

I would be almost certain that it uses a swtiching power supply, given the narrow profile (1 rack height) of the amp. Such power supplies behave quite differently than conventional ones. I would guess that the dynamic and continous power are about the same.

Class D or H? I hope not...

I don't know what class H is, but I doubt Class D as those are subwoofer amps. I have the impression that these were meant to be the extra two channels for people who bought a 755 and will want, or have, 7 speakers.

It undoubtedly is something like that - one thing fer sure, it ain't no class "A" circuit in a 1 3/4" high chassis dissipating 200 watts! Probably even class "B" would dissipate too much static heat. It almost has to incorporate some type of auto-ranging output scheme. The amp is undoubtedly designed to be 'stackable' in a rack, which would place a premium on power efficiency. Kind of a nifty concept actually, that type of circuit can be quite good, if designed well. But then, hell, I use vacuum tubes........

[This message has been edited by soundhound (edited November 23, 2002).]

A little birdy told me that a 200 is about 20 lbs, and does have a toroidal transformer in it (although very "mashed"!). That would imply AB, right?

I don't know anything , but class H to me means "cheap receiver".

(My Equitech 2Q, at 2 rack units high, has a 45 lb transformer in it. So 1 rack unit, ~20 lbs, could work.)

Having a big transformer would mean that it has a standard linear power supply, but there is still the possiblilty that it is run in something other than class A/B. It is pretty hard to build an amp that small and dissapate the heat, especially if it's going to be stacked. There's always the possiblilty of an itty-bitty fan in there somewhere too. I had a pro amp that was 1 rack unit high at one time, but it was only 100 watts. We'll have to wait, I guess for more info.

[This message has been edited by soundhound (edited November 23, 2002).]

I suppose a torroidal power transformer(s) can be made to fit in a single rack height chassis that has the needed power capacity. Also, some bipolar output transistors such as the MJL21193,4 complimentary pair, the MJL2115,6 complimentary pair and the MJL3281A, MJL1302A complimentary pair can operate with low bias current and have low distortion.

Maybe a thermally activated fan can take care of the large heat loads. If there is one, I hope it is not too noisy.

Paul

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the 1derful1