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RE: PS Audio UPC-200 - Anyone with experience-based feedback?

Posted by DevillEars (A) on August 2, 2007 at 11:13:15

In Reply to: RE: PS Audio UPC-200 - Anyone with experience-based feedback? posted by JerryD6 on August 2, 2007 at 10:58:31:

Hi Jerry,

Many thanks for the feedback - much appreciated.

The Rowland 201's use B&O ICEpower technology so are pretty damned efficient (~80%) and, at full rated power (250watts into 8ohms/500watts into 4ohms) draw 650 watts each. I never use these amps at full power as the speakers (Tannoy D700's) are very efficient (93dB for 2.83v) and I've set the CP-500 volume limiter to 70% and usually run at 55-60%.

The Classe' CP-500 draws a paltry 30 watts.

So the math would appear to be something like this:

- Assume maximum power output at peak listening level = 150 watts per unit
- Assume efficiency = 75% (quoted by JRDG @ >80%)
- Maximum power drawn = 150 / 0.75 = 200 watts per unit
- Total power drawn by power amps = 2 x 200 = 400
- Add power drawn by pre-amp (30 watts) = 400 + 30 = 430 watts
- Assume mains supply voltage = 230 v
- Current drawn = 430 / 230 = <2 amps
- At full power (ignoring damage) peak current drawn would be ~6amps

So, what we are looking at from a current drain perspective is somewhere between 2 and 6 amps for the amplification from a single Power Cell.

I'm looking to putting something like a PS Audio "Juice Bar" into the one cell to share two outlets across three components.

AM I SMOKING SOMETHING STRONG OR IS THERE AN OUTSIDE CHANCE THIS WILL WORK?

What I WILL DO is try out your suggestion (CDT on Zone 1, DAC on Zone 2 the rest on unconditioned power) as one of a number of permutations.

Thanks for your inputs...


DevillEars

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