Spa317 wrote:I found that the input impendance of my Xindak monoblocks is 47Kw.?)
Do you mean 47 K ohm - 47Kw (kilowatt??) is not meaningful as an impedance spec.
Does this explain why I am hearing a brighter sound through the "high" output switch from the pre through the phono?
No, frankly leaves me stumped. If 47K ohm is the spec - should seemngly work. 47 k ohm should be close enough to 50 k ohm to work without gross errors.
If yes, does that mean my possible fixes are:
1. Ditch the HOMC Denon DL160 cart and get a better mm cart (if yes, any recommendations to surpass the Denon (for my Planar 3), but not too pricey?)
It would seem the issue you are having is how the line level stage works with your amps for some reason. You note a harsh sound with the gain setting that only impacts line level. I'd want to get to the bottom of that. Changing cartridge does not fix the function of the line level.
Spa317 wrote:2. Keep the Denon, and change the power amps eventually, or get a seperate phono? (which doesnt seen that logical, given the the AR SP6 is supposed to have a decent phono stage?)
Something is not working to spec. Either the 47 K ohm spec for the amp is not correct or there is something out of wack with the SP6.
I'd want to get to the bottom of that before tube rolling, cartridge swapping or other unrelated actions that only confuse things.
The SP6 SHOULD work at the "high" (normal) gain setting and sound fine.