Question for tube aficionados


I have a vintage Conrad-Johnson PV 11 preamp.
 I’ve always re-tubed it  with the cheapest tubes from Tube Depot (e.g. Electro-Harmonix 12AU7 and 12AX7, Sovtek 5751 and the like.). I’ve been very happy with the sound.
 My question is:
 Would it be worthwhile to spend more money on more exotic tubes?
  Would there be any appreciable difference in the sound?
 I’m powering the system with NuForce Reference 9 V3 monoblocks.
128x128rvpiano

Showing 3 responses by twoleftears

Interesting.  The figures in this review suggest an average-ish impedance curve.

http://www.hifi-classic.net/review/dahlquist-dq-20-243.html

Did the modifications make them harder to drive?

@schubert Very interesting, makes a lot of sense, and explains the situation.

@rvpiano Have you ever thought about stepping up to the Bel Canto Ref600M's?  From everything I've read, they could be your dream amps.