Hi ,
im building a stereo 70 that will be used in a biamped system , its basicly going to be for 125 HZ up and a solid state amp will be 125HZ down for the subwoofer . Was planning on replacing C1 & C2 in both channels with .05 cap and adding a passive fiter to the input with a multiturn pot to ajdust the roloff between 100 and 150 Hz .
This is being built for a friend ,and want to know where natural roll of woud be changing C1 & C2 to .05UF .Math is one thing that never came back after the head enjury ( I know its 5 times the time costant ). Will fine tune it with a scope and signal generator after its built .
The amp will be driven by a modified PAS 3 with a cathode folower. There will be two RCA input jacks on it for each channel of the ST70 one with out the filter and the with the filter .Will use a FET folower after the preamp to buffer the filter for the subwoofer with the sub woofer filter built into the preamp .