Quote Originally Posted by Gazjam View Post
Thanks for that Dave, my amp impedance is 47k Ohms.
Just concerned that the sound would be a bit bass light with the 1.6.....but a lower roll off freq. means the oppsosite?

excuse my ignornace!
You are highly unlikely to get any difference in audible bass level from changing a 1uf cap to 1.6uf All you'll be doing is shifting the -3Db frequency lower & it'll already be sub 10Hz.

There is a very good reason for possibly doing this though & not a lot of people tend to think about it. The phase of the waveform will still be shifted slightly at audible frequencies (20Hz & higher) & this along with phase shifts caused by loudspeakers can be heard

What's even worse is that nearly every (if not all) bit/s of kit in the audio chain will also likely have a high pass filter due to capacitors at about the same frequency. The consequencies of this will definately be heard in the audio band In reality if all these DC blocking filters were at 0.1Hz or lower, there would be a definate increase in fidelity in the lower bass range due to vastly less equipment induced phase shift

Moral is to keep the -3Db frequency as low as possible except on a warp filter for a record deck