JBL B460 passive sub w/o external crossover unit

So I just inherited some old audiophile equipment, dads been dead a few years and we just moved his widow into a senior community. Among some of my dads stuff I took home was a massive JBL passive sub a B460 and a Bryston 4B-ST amp, but I cant find the JBL BX63A (a external dividing network, crossover) and I there isnt one to be had on ebay or elsewhere. Heres the question: can I hook the amp up to the sub out on my onkyo sc886p pre/pro and set the sub crossover at 60hz? And will it sound right?
Nope. The passive sub requires an amp to drive it and your pre-pro provides only line-level outputs. You will need to add a power amp to run that sub.

i guess i was unclear...
can i connect the onkyo 886 (pre/pro) subwoofer out (XLR) to the bridged input (XLR) of the bryston (amp)and just use the pre/pro's crossover set at 60hz? and will it sound right without using the JBL dividing network BX63A (active crossover I dont have)?
So I hooked everything up and used audyssey to set up the sub. It sounds decent, powerful deep bass with no boominess but not how i remember it as a kid. Either my vandersteens have desensitized me or the lack of a active dividing network might be holding the b460 back

The bryston had a blown fuse and keeps blowing it just by being on w/o anything connected, (its being sent back to bryston 20 year warranty, wow way to stand behind your product), so im pushing it with a crown xls-402 thats 900w when bridged. I dont want to turn the crown all the way up so im waiting to see what the bryston is like when I get it back.

In the meantime I might try an active crossover out theres a few to choose from pyle or behringer around $200-300
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:


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!!!
Just acquired a JBL BX63A via the wanted ads here on audiogon. No power supply, manual (I've downloaded a PDF version), or box. $412 shipped. I purchased the odd AC step-down (120vac to 12vac) transformer (power supply)on the web for $10 and it should be here by Friday.

Just after I payed for the one I got from a Canadian audiogonner, a second gentleman offered me another BX63A for $450. So if anyone else is looking for one PM me and I'll give you his email.

I will post again after I have the B460 hooked up to the BX63A to report on sound quality.
So my 15vac power supply arrived today and I hooked up the JBL BX63A active crossover to the JBL B460 Subwoofer. The Bryston 4B I inherited with the sub is on its way back to Bryston for warranty repair. So I'm using a Crown XLS-402d (bridged to 900w mono into 8 ohms) to push the B460 until the Bryston comes home.

WOW! definitely a huge improvement on low end. I still have to dial in all the right settings on the bx63a and the Onkyo PR-SC886p Pre-Pro

and im trying to figure out the best way to feed the signal to the bx63a Main L&R or LFE

and if i use the LFE do I just use one input on the bx63a or do I use a Y connector

I'm going to try running Audyssey Pro and see what it does with the LFE feeding one channel on the bx63a and report back