Unecpected and not understood tweek - help?

OK, well then I would suspect that the output impedance of the tape outs is much less than 47K, and also that the tape outs are not driven by separate buffer stages that would isolate the main signal path from what is connected to those jacks.

So perhaps the cable capacitance and/or the 25K loading are interacting with the main signal path to produce the effects you are describing. Cable capacitance, to the extent that it may have any effects at all, would figure to affect mainly the upper treble, and to attenuate it slightly, which would seem to correlate with your mention of reduced edginess.

It's hard to formulate a more precise explanation without having detailed information on the design of that part of the Krell's circuitry, but it does seem very conceivable to me that the effects you are perceiving are real.

Best regards,
-- Al

Al,

If the front end source is a CDP, and basically the tape out jacks of the amp are connected in parallel with the CDP output, would that be causing the difference in sound Rpg is hearing? The output of the CDP is being affected.

Al, thanks. I guess potential flaws with the Krell tape-out and the impedance of IC's and V-CAN ended up as a good thing. In the end, I now have a headphone amp and a better sounding system to boot!
Rpg

If the front end source is a CDP, and basically the tape out jacks of the amp are connected in parallel with the CDP output, would that be causing the difference in sound Rpg is hearing? The output of the CDP is being affected.

Hi Jim,

Yes, that's a possibility if there is no active circuitry or significant resistance between the Krell's cd input and its tape outputs. That is the case with at least some designs (I believe that my Mark Levinson ML-1 has nothing between its inputs and tape outs other than wires and switches), but I suspect that most designs are not like that.

Rpg -- Enjoy!

Best regards,
-- Al

Jea48,
Yes, the source is a CDP and occasionally a Tuner. Regardless of my input source, primarily CDP, the positive affects of having the V-CAN connected can be heard. Mind you, it's not Earth Shattering, but it does calm down a bit the trademark Krell sound, it's less hyperactive and a bit warmer. Even if I didn't listen to headphones, the inexpensive (and sounding inexpensive) Musical Fidelity connected to my tape-out turned out to be an affective tweak.
Rpg