Impedance matching is a no-brainer. It's (at least in the case of tube preamps) the values of the output capacitors. 50k is way too low for tube amps, which run in the mid- 250k-ohm range. Fifty should do you fine for a s/s amp. Coupla solder connections and you're good to go, and probably upgrade the caps that are in the retail pre-amp as well. Murndorf silver-oil or gold-oil are the best.
Preamp... Solid State or Tube
I am looking for 2-ch preamp that must have HT bypass option to mate with my existing HT processor.
My budget is 10K for this upgrade. Couple of preamps comes to mind but I have no experience with these components.
Ayre KX-5 Twenty
Aesthetix Calypso
My system consist of following components,
Speakers - B&W 800D2
Source - Aurender N10, Modwright Elyse DAC, Raysonic CD-128
Amps - Modwright KWA150SE (Pair of them being used in bridge mode)
Processor - Krell 707
Cables - Verastarr Grand Illusion Statement and Signature series
Any recommendations will be highly appreciated.
My budget is 10K for this upgrade. Couple of preamps comes to mind but I have no experience with these components.
Ayre KX-5 Twenty
Aesthetix Calypso
My system consist of following components,
Speakers - B&W 800D2
Source - Aurender N10, Modwright Elyse DAC, Raysonic CD-128
Amps - Modwright KWA150SE (Pair of them being used in bridge mode)
Processor - Krell 707
Cables - Verastarr Grand Illusion Statement and Signature series
Any recommendations will be highly appreciated.