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I've already set the internal switch to low and it's an improvement but not enough for my small room and late night listening habits. At 9 o'clock (on volume dial) it is too loud and the previous increment is too soft with loss of dynamics and imaging. Mind you this is with the tape input and jolida cdp. The other inputs have more headroom and I have no problems with the phono section. Why do I want to stick with the Jolida and tape input? Easy, it sounds by far the best.
I guess amp impedance doesn't mean a whole lot then? I've found so many various answers here and on Audio Asylum. Down the road I'm looking at perhaps tube amplification which most seem have impedances ranging from 100k (vtl) to 450kohms (old dynaco amps). What are some of the abnormalities that I would hear with the a poor impedance match?
Mr. Audio Engineer: could you please explain to me how you came to the conclusion that 10 pf per foot was required in this situation?
If you want the sound not to degrade, I would recommend that you change the resistors in the stepped attenuator, instead of adding a voltage divider to the cable. This is a real easy thing to do. Just jump across the reisistor that you are most likely to select with another resistor, which will reduce its value by paralleling the two resistors. The combined resistance will be: (R1*R2)/(R1+R2) This way, you can determine the exact resistance that you will need to order to get the volumes that you like.
Dan - these are exactly the numbers that I came up with. 265K ohms reactance. .04 dB down for the 10 pF/foot cable and and .2 dB down for the 50 pF/foot cable. I dont think there was a math error.
I imagine that most components do have input filters, however, not all of them. Some may have none or limit the B/W in the feedback gain-control for the input stage. Probably a good design practice, however.