Larpy
Member
I've been rolling output caps in my Extended Foreplay III (which feeds a Kaiju) and I confess I fell under the sway of what Doc B calls "cap of the month" syndrome. A question has emerged. I have a preamp out signal from the FPIII that goes to subwoofer amps that are set to turn on when there's a signal present. I've noticed that some highly regarded boutique caps produce a distractingly loud turn-on thump (which I hear through the subs) when I turn on the FPIII. Other caps are silent when I turn on the FPIII.
Since the only difference involved is the brand of 2.2uF output caps, does the presence of a turn-on thump suggest that those caps are passing DC? Are they flawed (or defective) caps? Or is a turn-on thump not necessarily a reflection of rogue DC from a bad cap? (It might be worth adding that the caps that thump don't sound very good.)
Since the only difference involved is the brand of 2.2uF output caps, does the presence of a turn-on thump suggest that those caps are passing DC? Are they flawed (or defective) caps? Or is a turn-on thump not necessarily a reflection of rogue DC from a bad cap? (It might be worth adding that the caps that thump don't sound very good.)
