Jbl B460 + Bx63a

[mm54]

L300 SUMMIT use a 2235H and the B460 Passiv Subwoofer use 2245H
I wonder if it's interesting to use a JBL B460 coupled with L300 SUMMIT ? there is a filter system JBL BX63A with the B460 connected between the amp and speakers, this does not duplicate with 2235H of L300 ?
I have also OUT subwoofer on my Accuphase E203, and actually my L300 are connected directly on Speaker L and R.
I dont realy anderstand how the system can be connected if interesting ..
the JBLPrice for B460 on 1993 is $2150 has the same buying power as $3181,94 in 2009 (calculing with Inflation Calculator)

[hjames]

L300 SUMMIT use a 2235H and the B460 Passiv Subwoofer use 2245H
I wonder if it's interesting to use a JBL B460 coupled with L300 SUMMIT ? there is a filter system JBL BX63A with the B460 connected between the amp and speakers, this does not duplicate with 2235H of L300 ?
I have also OUT subwoofer on my Accuphase E203, and actually my L300 are connected directly on Speaker L and R.
I dont realy anderstand how the system can be connected if interesting ..
the JBLPrice for B460 on 1993 is $2150 has the same buying power as $3181.94 in 2009 (calculing with Inflation Calculator)

(didn't you ask the same Q yesterday? - ah yes, you did - right here:
http://audioheritage.org/vbulletin/s...4&postcount=91)

Probably would be interesting
B460 Subwoofer's 2245 can go lower than the 15s in an L300 system, fills in around the bottom, and Bx63a can put a little hump at the lower freqs to accentuate the bottom ...

Its all a money game anyway - how much did you have to spend?

[BMWCCA]

Its all a money game anyway - how much did you have to spend?

Or just go with a 4345 and save space!

[mm54]

(didn't you ask the same Q yesterday? - ah yes, you did - right here:
http://audioheritage.org/vbulletin/s...4&postcount=91)

Thank you hjames , I apologize , i have send a message to the [email protected] to delete this link
i am newby (Posts: 65) ..I am always pressed for a response from members of this forum.. be indulgent thank you

[Fangio]

I dont realy anderstand how the system can be connected...

http://audioheritage.org/vbulletin/s...ad.php?t=21164

[JBL 4645]

http://audioheritage.org/vbulletin/s...ad.php?t=21164

That was good link and interesting read. I especially liked this part from the manual.

The 2245H produces bass that is powerful and accurate. Reactive acoustical energy storage in the ported enclosure augments the cone’s output so that cone excursion is minimal-keeping distortion very low. In a typical listening environment, the B460 can generate sound pressure levels of 115 to 120dB. It has the power to recreate earthquakes and cannon shots, but it also reproduce the full harmonic textures of a contrabassoon or the subtlety of softly played tympani.

Seems good enough for Earthquake or Master and Commander

[mm54]

thank you Fangio for the link !

Can you, please provide more information on this subject typically with diagrams.

if i anderstand i must add a amplifier for the B460 ? do you think i can connect directly to my Accuphase without BX63A
if someone using a B460 could make a connection diagram it would be easier for me and I might just be understanding if I need to add something to operate a B460 ..

[Doc Mark]

Good Morning, Michel,

As I understand it, the BX63A is not only an electronic crossover, but also a special voltage drive, which boosts the signal to the 2245h at a specific place, and therefore gets the response that the B460 offers. Without it, I think that the system will not function as designed. I could be wrong, but that's how I've understood it to work. Best of luck, and God Bless!

Every Good Wish,
Doc

[hjames]

Good Morning, Michel,

As I understand it, the BX63A is not only an electronic crossover, but also a special voltage drive, which boosts the signal to the 2245h at a specific place, and therefore gets the response that the B460 offers. Without it, I think that the system will not function as designed. I could be wrong, but that's how I've understood it to work. Best of luck, and God Bless!

Every Good Wish,
Doc

Opimax has a B460 that sounds real nice without the BX63/63A (Base eXtension) device.

The B380/B460 came out before the advent of home theatres when sub out ports on receivers weren't common.
The BS63/A has a couple functions, - allowed you to loop your left and right mains through so it could extract a summed Low pass channel to run your sub. You set the crossover point and the gain, and feed its out to a (mono) poweramp for the sub.
They do have a bump at the low end.

http://www.jblproservice.com/pdf/Vin...BX63A%20ts.pdf

http://manuals.harman.com/JBL/HOM/Owner%27s%20Manual/BX63om.pdf

You can also see discussion of the unit in the thread here:
http://audioheritage.org/vbulletin/s...ad.php?t=21164

[4313B]

As I understand it, the BX63A is not only an electronic crossover, but also a special voltage drive, which boosts the signal to the 2245h at a specific place, and therefore gets the response that the B460 offers. Without it, I think that the system will not function as designed. I could be wrong, but that's how I've understood it to work.

Come on guys! We've covered this extensively. D.B. Keele? Ring any bells? All of you should know his name and be able to recognize it spelled forwards, backwards and upsidedown.

AES E-Library: A New Set of Sixth-Order Vented-Box Loudspeaker ...

AES E-Library: A New Set of Sixth-Order Vented-Box Loudspeaker ...

B460

Keele designed the BX63 way back when he was working at JBL (After leaving EV. He's now at Harman-Becker along with Richard H. Small of Thiele-Small fame).

Don't let the title of the AES papers throw you with respect to the B380 and B460, they are quasi-third order alignments as are most high performance JBL loudspeaker systems due to their low Q transducers. Addition of the BX63 makes them quasi-fifth order. If you understand the concepts it all makes sense. One can choose to use the BX63 or not depending on boundary reinforcement in any given room.

[hjames]

thank you Fangio for the link !

if i understand, i must add a amplifier for the B460 ? do you think i can connect directly to my Accuphase without BX63A
if someone using a B460 could make a connection diagram it would be easier for me and I might just be understanding if I need to add something to operate a B460 ..

Old thread, but since the original posting in 2009, I actually found a B460 for sale cheep, and had it shipped to me from Florida.
I did find a BX-63A a year or so later, but frankly I have been running it from the Sub output of an Integra DTC 9.8 PreProcessor
using a Harman Kardon Citation 22 Power Amp bridged to Mono, without the BX63A, and it plays VERY well that way!
I have 4 UREI 809A coaxial monitors in the system, and tho they don't go real deep on their own, they are crystal clear otherwise.



My friend Steve built 2 of the standalone 2245 subwoofers for his home audio system, and drives them with Adcom monoblocks,
and they are downright impressive on their own.

[rusty jefferson]

.....My friend Steve built 2 of the standalone 2245 subwoofers for his home audio system, and drives them with Adcom monoblocks,
and they are downright impressive on their own.

I think our man Steve has 4 of those bad boys in that closet now, doesn't he?

[mm54]

difficult to find .. JBL BX63A crossover for B460 sub.

[4313B]

Yeah, it's probably easier to either build one yourself or have one built for you. I'm buried otherwise I'd whip one out for you. I've posted the schematics numerous times. I think I also posted how to modify the 5234A/5235 to do the same thing.

We should probably make up a bunch of new circuit boards. It would be a nice little project for people, kind of like the neat little projects Rod Elliott makes available for folks. In fact, one of his projects might do the trick instead.