The 'cold' XPA-200

[ludi]

I've my new XPA-200 installed for a couple of days. It is driving the surrounds, while the XPA-2 drives my fonts. I have a 4.2 setup, but that is not relevant for now.

Anyway, yesterday evening I watched a rented blu-ray movie "The Day the Earth Stood Still". A quite boring story, also not relevant for now. Then I watched the Vangelis DVD "Mythodea Music for the Nasa Mission: 2001 Mars Odyssey". Not the best visual quality but an incredible sound, not in the last place because of the 30 or so kettledrums behind the orchestra.

Now to come to the point: the XPA-2 felt quite warm to the touch, not hot but just what you expect from an evening playing movies and music. But the XPA-200 felt cold, like it was just switched on a couple of minutes before, instead of a couple of hours playing. It just amazes me, is the XPA-200 that much different from design from the XPA-2? This cold has nothing to do with the sound, that is outstanding. It just surprises me how little heat the amplifier generates.

Don't get me wrong: I'm not complaining, it is just an observation.

[Topend]

Maybe the surrounds are just getting less sound.

Dave.

[ludi]

I fully agree, but in the past with an amplifier swiched on for a couple of hours it felt at least warm. Even the UMC-1 is warmer than the XPA-200.

[rob80b]

Hi Ludi

Depends on the movie, thought I was doing ok running my surrounds with my Bryston 2BLP (60 watts) but after watching the latest Batman I could have fried eggs on it (seriously) , so I thought I’d give a 125 watt UPA-2 a shot, no sweat, cool as a cucumber.
And as I mentioned elsewhere, I was so impressed with the UPA-2 that I just got a XPA-200 which has been doing some heavy rotation for the last couple of days up front with my 4BSST.
The XPA-200 does get warm, but that’s after 3-4 hours of moderately loud music, but so was the USP-1.

Robert

[garbulky]

The XPA-200 probably gets less work out on the surrounds. The gain structure on the xpa-200 is 29 db, the xpa-2 is 32 db. If not adjusted correctly to match on the avr, the xpa-200 is probably putting out an unequal volume vs xpa-2.

[The Mad Norseman]

Feb 24, 2013 16:11:31 GMT -5 garbulky said:

The XPA-200 probably gets less work out on the surrounds. The gain structure on the xpa-200 is 29 db, the xpa-2 is 32 db. If not adjusted correctly to match on the avr, the xpa-200 is probably putting out an unequal volume vs xpa-2.

Right, but if(?) he ran his UMC-1's EmoQ, that should already have adjusted for that kind of level output difference.