BX63 replacement?

[mrbluster]

Are you still looking for a bx63?
Check your PM box.

[gerard]

Hello

I would like to come back on Tom rober schematic for xover .
I do not knwo a lot about electronic !

the bx 63 has one dual input and 2 dual output ( 1 filtered under 63 hz and 1 upper 63 hz ! )

The drawing has one input and one output !

Can someone give more explanations !

Gerard

[Zilch]

http://manuals.harman.com/JBL/HOM/Te.../BX63%20ts.pdf

First thing BX63(A) does is sum the left and right channels to mono for generating the single subwoofer output.

The "two" bass outputs are the same mono output, one is merely inverted for use in converting a single stereo amp into a higher-powered "bridged" amp. Those are NOT stereo LF outputs. If you hooked a stereo amp and dual subwoofers to them, they would acoustically sum to zero bass....

If you don't need summing and don't need bridging, it's a simpler schematic, is all.

If you want stereo subs, you build two of those....

[gerard]

thank you !


I never saw the schematic !

Gerard

[Tom Roper]

I think my schematic also omitted the "low pass" filter, since I was using it on a subwoofer channel LF output that already had a low frequency cutoff applied.

So the salient point of the simplified circuit was to give it the "boost" curve intended for the 2245H driver inside the B460 enclosure.

Thusly, I omitted the other features of the BX63A that I didn't need.

The main thing to know, is that the entire BX63A can be easily constructed from the schematic (PDF file), or just the parts you need for your own installation.

[JuniorJBL]

http://cgi.ebay.com/ws/eBayISAPI.dll...783056307&rd=1

[gerard]

The price on ebay will go up to the moon !!!!


Gerard

[JuniorJBL]

Usually about $200

[gerard]

200 $ price of an amplifier .... or a very good burgundy bottle or a night in a marrakech palace .


Gerard

[Zilch]

I wanna night in a Marrakech palace. Yup.

[Already gotta BX63A....]

[gerard]

400.00$ ; 4 night in Marrakech !!!

http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA%3AIT&rd=1
gerard

[John]

Usually about $200

Wrong!!! More like $400.00

[JuniorJBL]

I got mine for $195 on ebay. Guess it's just what happens!

[Titanium Dome]

Of course there was no set up guide included with my recently acquired B380 and BX63A. Okay, I read this

http://www.audioheritage.org/vbullet...04&postcount=6


and I've got a number of PCR800 amps, six to be exact. However, I don't have any of the Soundcraftsmen bridging "thingees" to use.

If I use the "normal" and "inverted" LF outputs on the BX63A to the A and B inputs on a PCR800, does that preclude the need for the Soundcraftsmen bridging device? If so, then I merely run one speaker cable (two wires), one wire from A+ to red and the other from B- to black? Or did I just blow up the B380? (Figuratively speaking, of course; I haven't done anything yet.)

[Lancer]

http://manuals.harman.com/JBL/HOM/Ow...ual/BX63om.pdf