Best Preamp and Amp combination, interesting finding!!!


Hi all,

Yesterday, I decided to conduct a very interesting experience using my amp and preamp combinations. In the interest of fair discussion and also avoiding brand war, please allow me to conceal the name of the amps and preamps, knowing that both amps and preamps came from the same manufactures. The combinations are as below: 

Combination 1 (C1): $3000 preamp + $1000 amp
Combination 2 (C2): $1000 preamp + $3000 amp.

I went back and forth between C1 and C2 several times with multiple people, using the same speakers and DAC. The volume of both C1 and C2 was adjusted to be equal using my Db meter. 
At the end of the experience, almost everyone including me prefers C1. Which is a higher-end preamp combined with the lower-end amp. 
I was surprised by that finding. I always thought that the amp has a greater impact to sound quality, but my experiment proved otherwise. If you have any similar experiences, please let me know. I would like to understand why it happens that way. Why the preamp has a greater impact on the overall sound quality comparing to the amp?
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Showing 2 responses by antigrunge2

This thread seems borderline meaningless: whereas the preamp is crucial on low voltage phono, all you need for high voltage digital is an attenuator in a reasonably well matched system. And that before you even start accounting for mismatches between preamps and amps: Dooh….
Emotions without a modicum of technical understanding are not much use. A modern Dac puts out 2V RMS single ended and 4V balanced. That is the same as a spec preamp and plenty to drive any power amp. So all that’s needed is an attenuator not eating half the signal.

Conversely any vinyl output is measured in mV, i.e.smaller by a factor of at least 100x. Seems obvious that the preamp has an important role to play for SQ.

Equally, the link between pre and power amp and Dac at a minimum requires decent matching of impedance and decent connection cables..

The OP left us in the dark on either issue, hence the discussion is both all over the place and ultimately meaningless.