Accuphase Power Amps

Hi Simon,
When Nvp says, "has efficient speakers", I can only assume he's speaking of speaker sensitivity. As sensitivity of a speaker goes up, less power is required for volume and dynamic peaks.

The A-35 is rated at 30w/ch, and the P-4200 is rated at 90w/ch, or an approximatly 4.75db difference in power. So the P-4200 is capable of dynamic SPL peaks about 5db higher than those of the A-35 on the same speaker. Also, a 94db speaker with the A-35 will have the same capability as an 89db speaker with the P-4200.

I have listened to Accuphase Class A and Class A/B, and agree with the other comments regarding this, however to answer the original question, it would be helpful to know,

1) listening volume - low, moderate, or high
2) listening distance
3) amp you have previously used with the Spendors

I am assuming that some of your symphony recordings will have a wide dynamic range.

Thank you for yet another informative response. I'm using a Bryston 4BSST2 that I think has 300w into 8ohms. I consider my volume levels are moderate, certainly not high and I sit about eleven foot from speaker front. I have one&half foot behind my head, two&half feet to side of speakers and four&half feet behind speaker. My Mahler/Bruckner type symphonies are original early 1980 presings that on the Telarc label, for example, warn in the sleeve print of the wide dynamic range of the recording because no compression or equalization was used.
Simon

I'd also add 'room size/volume' as being another determining factor.

The room is 17 feet x 14 feet x 11 feet high ceiling. Not sure what that is in CC.
Simon

Simon,
Gathering from all your infos thus far, namely : room size, listening distance, music choice, speaker's sensitivity, and last but not least, coming forth from a Bryston 300w amp.. I too as Dave would, sacrifice that last vestige of refinement of class-A for the more superior all-rounder, ie. put my money on the P4200.