Just buy a Pass amp. The 30.8 is a great amp.
a lot of people do not understand you have to have your amps specs line up with your preamp or DAC/Streamer used as a preamp.
hegel like higher powered amps and weaker preamps. American equipment typically does the opposite. I have a buddy who has the Hegel mono blocks with the VAC Master preamp. Oddly though it has very similar specs to the Hegel Preamp so it works perfectly. I think the VAC is 9 volts. Where as my audio Research Ref 5se has 12 volts output which sounds amazing with my Luxman M10X amp.
This One has Me Stumped
I recently purchased a Pass XP-12 to replace my aging ML 38s. After installation, I noticed gobs of high frequency distortion, especially in Operatic female voices.
I measured every component in the signal chain separately. All are performing in spec.The XP-12 has very impressive test results.
Re-installing the 38s gets me immediately back to more mellow sound.
In my system, I have an EQ and crossover between the XP-12 and my Bryston 2.5b^3 power amp. I removed the EQ and the XO, plugging the XP-12 directly into the power amp. The distortion remains.
I am puzzled. I am a measurement guy. I use REW extensively. I can measure and troubleshoot almost any problem in my system. This one is a stumper.
Can anybody suggest a measurement or a way to solve this apparent component mismatch?
My system in order from source to output :
Shelter 901 MKIII MC or Koetsu RS MC cartridges
Parasound Zphono XRM phono preamp
Technics SL-1200G TT
Oppo BDP-105 Universal player (digital)
Bryston BDA-3 D/A ( feeds the Oppo signal to the XP-12 or 38s)
Sansui TU-X1 tuner
XP-12 (38s) line amp
dBx 1231 EQ
Rane AC22 2 way crossover
Bryston 2.5B^3 power amp
Usher 604 floorstanding speakers
HSU ULS-15 sub (when using the XO)
Thanks,
Kevin
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- 27 posts total
- 27 posts total