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    Altec VOT 828 - 816

    Hello,

    I have built a few Altec 828 cabinets and a couple of Altec 816 cabinets.
    The question is: is has anyone got any experience or advice on making something between the two?
    I'm thinking The...
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    But have you used those really expensive berylium...

    But have you used those really expensive berylium diaphragms inside a JBL driver before? Never even knew that was an option, albeit an expensive one! Thanks for the advice...
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    Nah, I got em here...

    Nah, I got em here in the end for $182 each which is bad enough... considering it probably won't fix it!
    I'll open it up and have a look inside... maybe you're right. That would be nice and easy.
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    JBL 2440 HF Loss

    Hello,

    I have a pair of JBL 2440's with JBL 2395 horns as part as an actively crossed over system (800-8000Hz 18db/oct).

    I have noticed a distinct decrease in HF output from one driver...
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    JBL manual

    Also see the JBL 'sound system design reference manual'

    PDF download is split into 2 parts for some reason:
    http://www.jblpro.com/pub/manuals/pssdm_1.pdf...
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    specs

    There seems to be quite a bit of confusion at the manufacturers/distributors end about the specified rating of this driver, but both these specs seem to show 200W (rated input power) 500W (maximum...
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    I have a similar problem and have looked at this:...

    I have a similar problem and have looked at this:

    http://www.geocities.jp/arai401204/Enclosure/E170/E170.html



    There's a sketch of it here, I think...
    ...
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    Or, maybe maybe I could build these... if there...

    Or, maybe maybe I could build these... if there were some designs for the TAD loaded cabinet as shown in this picture:

    56222

    which can be checked out on this nice page:
    ...
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    jbl bullet tweeters in the centre of the room ...

    jbl bullet tweeters in the centre of the room

    56204

    nice floor... definitely the highest quality finish on any bit of woodwork in the room!
    56205
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    Altec A7 + ported cabinet

    wanted to know what you guys thought of putting a TAD 1601B in a ported box below the A7's shown in these pictures:

    two stacks like this with 2441 on a 2390 lens and 2405 tweetrs:
    56199
    ...
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    caps

    you can also use protection capacitors...
    The JBL/UREI - 525 active crossover manual has some frequency/capacitance tables
    [/URL][U]UREI 525

    thanks
    tom
  12. and where would you buy VOT's from in england!?...

    and where would you buy VOT's from in england!?
    actually, maybe don't tell me - i decided to build mine and i would kick myself if originals were available!
    seriously though, where?

    Tom
  13. I'm just about to try some TAD1601 in A7 VOT...

    I'm just about to try some TAD1601 in A7 VOT cabs.
    Currently using 515 8GHP

    I will let you know how they sound (i know they sound great at low volumes, but can't turn it up yet due to not enough...
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    now i look closer at the TAD spec i see something...

    now i look closer at the TAD spec i see something else:




    Max. Excursion Before Damage (P-P) 36,0 mm

    Which would mean the driver...
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    Ha, yeah I live near where you lived... Look ...

    Ha, yeah I live near where you lived...

    Look at the A7 - the speaker is hidden partially behind the baffle.
    The Xmax of the TADs is 8mm
    The Xmax for the Altec is 0.12 inches or 3mm

    So i feel...
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    hey, i was just wondering how you crossed over...

    hey, i was just wondering how you crossed over your subs and at what frequency?
    do you have them as additional to the 515's low end, or is there a HPF on the 515's?
    I made 4 LAB Subs and also 4...
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    oh, i replied to an earlier post. i see you...

    oh, i replied to an earlier post. i see you finished them. i bet they sound great. are you happy with the sound?
    I never tried the tweeter you used - is it a 2404? maybe i should get hold of one......
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    Hey, they are nice... I have some with 515's in...

    Hey, they are nice... I have some with 515's in and JBL2440/JBL2395 lens horns... the tweeter is essential in my opinion i have tried JBL2405 and JBL2402 - i prefer the former.

    I run BGW 250 on...
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    I'm up in Leeds... where abouts in London are...

    I'm up in Leeds... where abouts in London are you?
    Yeah I use birch ply in all my speaker builds, not marine though - that's crazy expensive now...
    It might be nice to have a contact for this...
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    i actually did request 2 spare gaskets with the...

    i actually did request 2 spare gaskets with the tad1601b that i got. but i was warned off doing this by someone who used to work for a spkr mfr years ago. they said that the elastic modulus of the...
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    yeah i can probably figure a lot of stuff out,...

    yeah i can probably figure a lot of stuff out, but there's nothing like finding out off someone who knows or has come across this particular problem before... thanks for the help though.
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    unfortunately you can't mount the speaker in...

    unfortunately you can't mount the speaker in front of the baffle on the Altec voice of theatres.

    with the spacers you describe, assuming i don't want to glue them (so i can still swap other...
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    thannks...

    i recently got some 1603 baskets with the cones totally wrecked for £100 each on ebay, they were in the UK. I see there's 1 x 1603 on ebay and whilst it would come in at £200 from the US it does...
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    yeeeshhh... really?

    yeeeshhh... really?
    nobody got any advice on this matter?
    I tought that this forum would be THE place to turn for the TAD/Altec combo question...



    Thanks
    Tom
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    sure enough...

    yeah, got some TAD 1601B drivers and this is a problem... look at the difference between the altec gasket on the left and the TAD on the right...


    55930


    so it looks like i've got 6 or 7 mm...
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