JBL B460 passive sub w/o external crossover unit

You did make yourself clear in your question.....the answer was yes......

The BX63A puts in several dB of EQ boost at about a 26Hz center IIRC. So to make the sub sound as it did with the BX63A, you'll need to re-create this EQ curve.

Jr_w : do you think I can recreate that curve with my pre/pro eq or I need an active crossover?

Take a look here:

http://www.audioheritage.org/vbulletin/showthread.php?4557-B460

The last paragraph of text describes the operation, the last page is a graph of the drive.

I'm not familiar with your pre/pro, but that's a description of what the BX63A does. I suppose it wouldn't hurt to slap some serious + EQ in at 26Hz and give it a listen. It mentions that the EQ is centered on the vent tuning freqency, so I think that's the main clue as to what to look for.

Be patient...behringer & pyle are not worthy of a B460. Another one to keep an eye out for is the Sumo Delilah crossover which went with the Samson subwoofer (basically a B380 clone with a 2235H JBL driver). I currently own both BX63A & Delilah crossovers patiently waiting for a sub cab to be built!! I was lucky enough to come across a 2245H driver, NEVER used, still in factory box, just rotted foam. The Delilah has a little more flexibility than the JBL. Both units eventually surface here or on e-bay from time to time. If I run across either, I'll let you know. P.S. when your 2245H driver needs foam repair... Bill Legall @ MILLERSOUND (215-412-7700) millerspkr@aol.com is the ABSOLUTE BEST!!!