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Um, Yeah!

Makes me want to go down to the 16th Street Mall...

Thanks for the pictures :)

Hi Tom,

"As you can see, it's a much superior drawing than the others. Bar napkins are that way."

Haha :)

This is for the B460 you picked up from Ron Gold right? :)

How is Ron these days?

"Gee, you mean people didn't actually WANT hyper-extended 2235s with their voice coils jammed all the way out, cocked and hung up on the top of the gap?? Geesh, what's the world coming to?"

I'm...

DC block in the BX63A.
The BX63 didn't have any... it doesn't take much of an imagination to figure out why JBL added them in the BX63A.

"My foggy memory tells me the triangle things are op-amps...correct?"

Yeah, they're symbols for opamps.

"If so, is there a particular type or rating (or part #) to look for?"

A TL072 will do...

Here is a schematic for a nice 25 Hz +6 dB bump filter with Q = 1.93 that is suitable for the B380, B460, 4645B and 4645C.

Again, it should be used with a decent power amp that has it's own DC...

Here is the schematic for the BX63/BX63A bump filter for use with the B380 and B460. It is suitable to place between the LFE output of an AVR and the input of a suitable subwoofer power amplifier...

"Is there a simpler solution (than the BX63) for the bass boost "problem" if I am starting from the single channel LFE output (20-120 Hz?) from a DD 5.1 source? I assume there would be since (AFAIK)...

Nice features of the BX63A are that it allows you to place an amp into strapped (or bridged) mode and it has an adjustable low pass filter from ~ 63 Hz to ~ 126 Hz.

If you can't find a BX63A, or...