2. amps-preamps
  3. 1323999458

Have I mismatched my preamp/amp?

Hey all; I recently purchased a Cary SLP-50B which I will be mating to a Rawson clone of the Pass Aleph 2. When I started doing the math, I know I'm slow, I looked up the output impedance of the Cary and its Aleph 2 from the Pass site and it's 2.2 K Ohms I checked the Pass site for the Aleph 2, being I don't have the exact spec on the Rawson, and the input impedance is 10 K Ohms unbalanced and 25 K Ohms balanced differential. The Cary only has unbalanced outputs. So, how mismatched is this? I understand the 20:1 rule and I'm way off. My point was to use the Cary to warm up the sound a bit of the Rawson, its brutally sharp and I thought warming it up was a good idea. Advice/Comments are welcome. Jack
fz1jmp
unsound
7,334 posts
 
If that were the case, why are they marketed as "Pass clones"?
mordante
511 posts
 
Because Pass publishes the designs he uses. So people can copy/clone them.I'm not saying Pass amps are not good. In fact they are one of the best I ever heard. But that doesn't make them unique in design.
pubul57
3,712 posts
 
Thought Pass was providing designs for the DIY community, not for commercial purposes (i.e., selling clones).

If Pass' designs are text book, he must be using a different text book, his amps consistently sound better than most other test book SS amps.
roscoeiii's avatar
roscoeiii
1,155 posts
 
My understanding is that Nelson Pass publishes his designs on the condition that they are not used for commercial purposes. This is much discussed at diyaudio.com
marakanetz's avatar
marakanetz
5,473 posts
 
...and for commercial purposes there are permissions exist and need to be acquired.
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