I have a Triode Electronics ST-70 amp. Input impedance of 470K and sensitivity of 1.3v = full output. I am using a Cambridge Audio iPod dock which has an ouput of 1.7Vrms. I have enough gain and I want to add a passive preamp (volume control) box to the front end. I do not want to modify the amp. I simply would like to know what value of pot or stepped attneuator would be the best. I am thinking 10k or 20k, I have tested using a 50k cheap pot but I think there is a little roll off in the high end so I think I should go down some.
Thanks.....Mike ~~