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Thread: What to do with my 4699b

  1. #16
    Senior Member martin_wu99's Avatar
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    4628B,4698b,4699B are very good sound systems, do some modification on the crossovers,you will find they are very good home HIFI systems
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    46 lover

  2. #17
    Senior Member martin_wu99's Avatar
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    some body make it home HIFI system
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    46 lover

  3. #18
    Senior Member martin_wu99's Avatar
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    Quote Originally Posted by Val View Post
    I happily now own a pair of 4699b Cabaret Series speakers. They are in good shape. Now I'm trying to figure out what to do with them. I don't really have much opportunity for the "sound production" that these are designed for. I then begin to think about what it would take to convert these to decent home system. The only thing I come up with seems very expensive. I post my idea here as I'd love some feedback.

    The problem is that the E155's and E110's are designed for sound production and not reproduction. So they are non-linear and add color by design. Great JBL Tech note explains this well:
    http://www.cieri.net/Documenti/JBL/T...ol.1, No.3.pdf

    But the E155's and E110's can be reconed (or traded I suppose).

    So here's the design goal: make a relatively small foot print DIY project for home listening

    Convert/trade the E155's for 2245H's
    Convert/trade the E110's for 2122's
    Sell/trade the 2370 horn for 2344 butt cheek
    Keep the 2426 (yep, it's the only component that would remain as-is)

    Then build a small-as-possible cabinet:
    2426+2344 on the top
    2122 crossover at 1300Hz @ 12db/octave
    2245H crossover at 290Hz @ 12db/octave

    Sort of a cross between 4345 and 4430 monitor.

    Thoughts?
    You'd better add a UHF(such as 2404/2405) on the top of your 4699B,and do some modification on the crossover,you will be satisfied by.......
    46 lover

  4. #19
    Senior Member Val's Avatar
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    Quote Originally Posted by turnitdown View Post
    JBL specs the E155 in a 6 cu. ft. box tuned to 40Hz. That should give you great bass in room. Build a small box for the mid and set the horn on top. Use the factory crossover, then tune to taste. Those should sound just fine for hi-fi. They come with the promise of compromise, just like any other speaker OR add a sub and leave as is. The components are decent, the box is too small.
    Existing cabs are about 9 cu ft. so 6 cu ft would be an improvement size-wise. Just wondering if anyone has any experience with non-tuned enclosures like H-Frame or W-Frame dipoles. I've built many tuned cabinets but never an open style. My interest is two fold; small size, and different, more open, sound.

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  5. #20
    Senior Member Val's Avatar
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    Quote Originally Posted by 1audiohack View Post
    Hi Val;

    Thinking about Lee’s suggestion, a 2342 biradial horn is the same size as the E110 and they look great stacked together and are naturally very nearly time aligned.

    That stackup E155, E110, 2426/2342 utilizing dsp like a dbx 260 or 360 with proper crossover, alignment and eq, the sound quality would surprize a lot of people. With some sub it would floor them.
    I've always liked the look of the 2342...but I have to say that I've become a little obsessed with the Bella Luna Diamante approach...and I have a friend with a wood lathe I can use. I'm super curious as to how something like this would sound. So who has a Bella Luna Diamante in California? Of course the pictured Diamante uses custom designed drivers for this setup...the 2425/E110 would be quite different. Still, might be a fun project.

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  6. #21
    Senior Member Val's Avatar
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    Quote Originally Posted by Earl K View Post
    The E155 & E110 can't be considered as serious music reproducers primarily because of the metal dustcaps and the lighter cones ( the light cone manifesting it's presence in too low an MMS figure for low bass > for the BL figure ).

    Both of the above factors are addressable to a great degree.

    Dust-caps can be changed out for whatever JBL type goes along with the ( 2123 or 2122 ) & ( 2240 / 2245 ) > or slathered in revoable window caulking goop .

    Cone weight can be added in the form of aquaplas ( or even some Hill-Billy Aquaplas by using something likeDuratex cabinet paint as a substitute ) .

    Since your in California, I think it'd just be easier to give all 4 drivers to Ken ( Edgewound > since he has the aquaplas on-hand ) and ask him to make them as HiFi ready as possible .

    I don't consider Xmax ( limitations ) as a deal killer here as long as the volume knob is kept in check ( & maybe using a higher overall box tuning on the 18" ) .

    Just Saying my 2cents.

    Ok. I was not considering that I could add mass to these cones. Is low mass the reason for the aluminum dust cover? Interesting. I'm not sure I'm down with the Hill-Billy approach but I did follow that link

  7. #22
    Senior Member Val's Avatar
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    Quote Originally Posted by 1audiohack View Post
    If you band limit E110’s with a bit of signal shaping they are pretty amazing.
    If I build something I will probably go the minidsp 4x10 route with tons of shaping...

  8. #23
    Senior Member Val's Avatar
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    Quote Originally Posted by RMC View Post
    Yours must be a more recent edition of 4699B with a 2426, since the initial ones came with a 2425 compression driver (See Cabaret Series brochure 12/86).
    I hope so, when I get a minute I'll pull the driver and take a look.

    Quote Originally Posted by RMC View Post
    It could be easier and cheaper to just replace the E-110 with another more suitable driver for mid reproduction, not necessarily from JBL because of availability/price.
    I hear you and agree with you, but, I like the challenge of holding to my design goal of smallest cabinet for these drivers.

    Quote Originally Posted by RMC View Post
    In my view, the E-155 crossed-over around 250 hz ... If money permits, you may even go the tri-amp way
    My 2405/375/LE15/2245 rig in the living room is quad-amped using a minidsp 4x10 so I would design these to connect to that rig for testing. That will allow trying different crossover frequencies.

  9. #24
    Senior Member Val's Avatar
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    Quote Originally Posted by martin_wu99 View Post
    4628B,4698b,4699B are very good sound systems, do some modification on the crossovers,you will find they are very good home HIFI systems
    I appreciate that! I'm impressed that you have those cabinets in the house. I couldn't swing that around here!

  10. #25
    Member turnitdown's Avatar
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    Thumbs up

    MAN! The speakers that have been sitting in the listening room. I was enamored with the Cabaret series for SR. They sounded nice at venue volumes. At home they were well-behaved at normal listening levels. You might try those just the way they are. With room reinforcement you may find they're just fine for you. When Henry Ford would have a meeting with someone at a restaurant, he would observe whether his guest/interviewee seasoned their food before tasting it and made judgements based on that. IOW - it's either - ready, fire aim or ready, aim, fire.

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