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Thread: Jbl B460 + Bx63a

  1. #1
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    Jbl B460 + Bx63a

    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)

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    Heather [Senorita member] hjames's Avatar
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    Quote Originally Posted by mm54 View Post
    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?
    2ch: RPi-4, Oppo, Acurus RL-11,Jolida 502,Valencias,JBL L212,Von Schw
    7: Oppo BDP103D, B&K, UREI 809A, JBL B460

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    Senior Member BMWCCA's Avatar
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    Quote Originally Posted by hjames View Post
    Its all a money game anyway - how much did you have to spend?
    Or just go with a 4345 and save space!
    ". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers

  4. #4
    Senior Member Fangio's Avatar
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    Explore the manual

    Quote Originally Posted by mm54 View Post
    I dont realy anderstand how the system can be connected...
    http://audioheritage.org/vbulletin/s...ad.php?t=21164

  5. #5
    JBL 4645
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    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

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    Quote Originally Posted by hjames View Post
    (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 lansing@audioheritage.org 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

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    thank you Fangio for the link !

    Quote Originally Posted by JBL 4645 View Post
    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 ..


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    Senior Member Doc Mark's Avatar
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    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
    The only thing that can never be taken away from you, is your honor. Cherish it, in yourself, and in others.

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    Heather [Senorita member] hjames's Avatar
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    Quote Originally Posted by Doc Mark View Post
    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
    2ch: RPi-4, Oppo, Acurus RL-11,Jolida 502,Valencias,JBL L212,Von Schw
    7: Oppo BDP103D, B&K, UREI 809A, JBL B460

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    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.

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    Quote Originally Posted by Hoerninger View Post
    There is a lot more to read.
    Which, evidently, no one is doing anymore.


    Well... they DO read Internet blogfests...

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    can you tell me if this pattern of connection you feel good and make corrections THANKS
    Name:  mm54_JBL_BX63A.jpg
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    Heather [Senorita member] hjames's Avatar
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    Quote Originally Posted by mm54 View Post
    can you tell me if this pattern of connection you feel good and make corrections THANKS
    Attachment 40534
    SHEMATIC

    There is a missing C in your diagram ...
    the word is Schematic -

    No flames are meant, take it just a gentle comment ...

    is it spelled differently en francais?
    2ch: RPi-4, Oppo, Acurus RL-11,Jolida 502,Valencias,JBL L212,Von Schw
    7: Oppo BDP103D, B&K, UREI 809A, JBL B460

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    Quote Originally Posted by hjames View Post
    SHEMATIC There is a missing C in your diagram ...
    the word is Schematic -
    thank you hjames schématique FR = Schematic US
    I think to connection error
    but you're right for C is identical in English and French

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