I don't know if this thread is still active (if not I'll have to find another forum).
I'm driving a Quad 303 power amp from the headphone socket of my Yamaha Amp.
From the published specs:
The Quad Power Amp i/p is 0.5V @ 22K ohms impedance
The Yamaha Headphones o/p is 0.51V @ 330 ohms
It looks like the impedance match is ok, but I had to attenuate the signal with 1MΩ resistors which I soldered into the DIN plug (Quad i/p).
What I want to do now is connect to the aux i/p of a Cambridge amp; the impedance is 47KΩ (the signal requirements aren't mentioned in the specs, but I would think it'll be around 15omV). From what I read here this will be a mismatch one option is to solder 47KΩ resistors across the i/p's (sig to scr) in the phono/rca plug; I don't really want to go inside the amp and change the resistors to lower values.
I'll also need to attenuate the signals perhaps with higher values than 1MΩ.
I wonder what the experts think.
Regards:
-Pete