B-460 subwoofer - need help
I just purchased an original JBL B-460 subwoofer on ebay - (as an addendum for my 250 ti´s). At least it used to be original at some time ..... . It looks in good working order but it seems not to have a crossover built in . When I hooked it up it sounds like a (bad) wide band speaker - with a wide frequency range. I did not open the cabinet yet - so I do not know if it has or does not have a crossover.
Does anybody know about the B-460 subwooofer and which crossover it originally had.
Also I would like to know what is the supposed power rating for the amp to drive it properly.
I am from Austria - so please excuse my not perfect english...
:bs:
WELCOME to our Austrian Friends!
You need the BX-63 electronic crossover that was the mate for the B460/B380. You are correct in your impression of the B460's sound without this vital piece of gear as it does not contain any crossover internally. You can run any brand of crossover (as long as it is of high quality) if you cannot find the semi- rare BX-63. The BX-63 crosses the B460/B380's at 63hz. It sums the Low Frequency information of the left anf right channels and outputs them to a mono channel and an otherwise identical inverted channel to enable bridging a stereo amplifier. At least 300 CLEAN watts from an amp capable of delivering high current would be the bare minimum I would use, 1kw wouldn't scare me at all, just as long as you set it up properly and again, use a VERY high quality amp. Massive, clean and musical bass is what you will get once you find the JBL BX63 or another quality unit. You will also need to pay attention to placement in the room (as much as you can) and balancing the levels between your mains and the sub. Take your time. A few inches can make a big difference although it usually is more like feet in a typical set-up. You've got something special there. Good luck and don't be afraid to ask plenty of questions of the forum members. We also really like to see pictures. Regards, Steve G