2. amps-preamps
  3. 162308-1644

Amp-preamp mismatch?? result higher volume. What is rthe cause??

Several months ago, I changed amps from a BAT VK200  to a P.S. Audio S-300 amp. I also invested in a new interconnect, the Audience "Ono"  which replaced  a basic Harmonic Technology " Truth Link" which is used  now between the preamp and the CD player  The P.S. Audio amp is very dynamic  but also more forward, but not aggressive 


Pre-amp is a Conrad Johnson PV-14SE and which I like very much 9uses two tubes in the output stage.  The current combo of interconnects has sounded louder (and more forward in the midrange) at the same volume setting used before with the BAT amp  To its credit, the P.S, Audio provides better detail and depth in the midrange than former BAT amp  


So, is there an impedance mismatch between the power amp and pre-amp??   Or  is the increase in volume a consequence of a mismatch between the interconnects, either to the amp or the connection between the amp and pre-amp??


Please advise.

Thank you

S.J.

sunnyjim

Showing 1 response by bvdiman

bvdiman
491 posts
 
High gain preamp to high gain amp problem.
When so, best to have gain adjustability in either to ensure an optimal volume range (my pre’s at 10 - 2 o’clock).
Otherwise, you can get attenuator cable made (-6db or -12db) to go in between i/c from pre to amp.. Shaves off a bit of quality, but worthwhile (in my old case) than having system already playing too loudly with volume barely touching 9.
Sticking with my preamp, ever since, I’d only consider amp/s with gain adjust (or low gain ones, preferably below 20db).
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