Axlinscotland wrote:I am using just one phono stage, the valves pre amp or which is actually a dedicated phono stage. The question is, how do I make my system sound louder, using the amp volume knob or givIng more outpout to the pre amp?
It would be nice to hear your answers. My thinking is that it depends on how much output you have given to the pre amp, but it is just guessing not mouch theory behind my reasoning.
Thank you for your answers.
Before any of us can give you cogent answers, just a couple of questions as I am unclear on a few points:
"Dedicated Phono Stage":
a) The pre-amp is designed *only* for a phono input, and has an on-board *gain* control.
b) The pre-amp is a conventional full-service pre-amp that has a phono-stage, and so you are using it to drive your integrated amp.
In the case of a) above, you will want to obtain a sensitive "true RMS" VOM (volt-ohm meter). Set it for ACV at the lowest possible range and connect it to the *output* of the phono pre-amp. Put on a record with a low P/A (peak-to-average) signal - Gregorian chant, Bach harpsichord preludes and similar come to mind for this purpose. Adjust the gain on the pre-amp such that the *average* reading on the VOM is 2V but/or no more than a tiny bit over in AVERAGE - momentary fluctuations may be from 0V (silence) to 3V (cymbal crash), but should be mostly at 2V. This is the "design input voltage" for your integrated amp, and should not be exceeded as you may overload it otherwise.
In the case of b) above - use the line-out/tape-out feature of the pre-amp and the "Spare" line-in of the integrated amp. This output will be at the proper voltage for the integrated amp and bypass all the tone/volume/filter controls in the pre-amp.
Cascading two volume controls is a recipe for distortion and potential damage to your speakers from excessive clipping - especially if you are running at relatively high volumes.
Good luck with it!
Melrose Park, PA