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  1. Replies
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    Looks good! My question was just wondering in...

    Looks good!

    My question was just wondering in where having all the drivers together ( with ports out ) would increase the level further by coupling. I guess if there was an increase, it wouldn't...
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    Thanks Widget!

    Thanks Widget!
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    subwoofer placement

    When stacking a group of subwoofers, let's say, 4 4645c,
    Is it better to have all the ports together, or all the drivers coupled together, with the ports on the left and right of the array?

    Or...
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    2,897

    Two different microphones from different...

    Two different microphones from different manufacturers well most likely have differences even if they are both " omni " patterns.

    The patterns are most likely different, look at the polar plots...
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    I think the 70hz is a typo, everything previously...

    I think the 70hz is a typo, everything previously found points to 80hz, as the point where the mains roll into the subwoofers.
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    What would be the cause of a loud thump on power...

    What would be the cause of a loud thump on power down?

    We had an amp that went out during a show, got it repaired, and now makes a loud thump on the disconnection of AC at the end of the night....
  7. Thread: Altec MR64

    by rlsound
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    2,154

    Altec MR64

    Hi,

    I need some input into horn coverages. I have a room that's 32 feet x 60ish feet, and I was wondering what would be better? Would 90x40 coverage be better? I would like to use the MR64, but...
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    Wings are generally 1/4 wave.

    Wings are generally 1/4 wave.
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    17,640

    Adding wings to the A7 might take it down a few...

    Adding wings to the A7 might take it down a few cycles. Sure works well with the A4. :)
  10. My background is Cinema Audio, so I can give you...

    My background is Cinema Audio, so I can give you a little insight.

    The models listed by 1audiohack are good choices, but I would choose the models with the 2242 driver. The single driver version...
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    A BIG welcome to Jay!

    A BIG welcome to Jay!
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    6,437

    They were also used by Pink Floyd, during " The...

    They were also used by Pink Floyd, during " The Wall " tour in the 80s.
  13. Replies
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    Good find! I would say they are very rare,...

    Good find!

    I would say they are very rare, having never come across these before.

    There was an article years ago that talked about these, and the design behind them was using a HUGE box to push...
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    Has anyone done a L-C-R setup with 3 4355? or...

    Has anyone done a L-C-R setup with 3 4355? or 4350? Ultimately you need the same speaker across the front for the absolute match in tonality. Any harshness can be worked out with EQ.
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    Mmm thanks for the IMAX porn gentlemen, made my...

    Mmm thanks for the IMAX porn gentlemen, made my day!

    Remember, IMAX uses bass management so the subwoofer is matrix created from the main channels. 80hz would be a good spot to start, i can't...
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    What kind of subs did you get? If you get a...

    What kind of subs did you get? If you get a chance to snap some pics I'd appreciate it.
  17. Replies
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    The mid range is an 8 inch driver, also eminence....

    The mid range is an 8 inch driver, also eminence. The polarity is reversed on it, make sure positive is going to the negative terminal.
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    The references you have read about JBL and IMAX...

    The references you have read about JBL and IMAX are referring to the older systems that used four way clusters. These speakers you and i have are a very different beast. There are two different...
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    Are you sure there are JBL drivers in those? I'm...

    Are you sure there are JBL drivers in those? I'm restoring a set and they use Eminence drivers for the cones and TAD, B&C, or Celestion for the HF.
  20. Thread: JBL 4641 Subs

    by rlsound
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    This is known as the B6 tuning. Boost of 6 db, at...

    This is known as the B6 tuning. Boost of 6 db, at box tuning frequency ( in this case 25hz ) at a Q of 2.
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    Hi Joe, I'm not familiar with the RCA's first...

    Hi Joe,

    I'm not familiar with the RCA's first hand but have worked in cinema for years.

    100' run usually dictates 12 gauge wire or less ( 10 gauge for subs ) but I would be more inclined to...
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    Bi amping is the only way to use these speakers...

    Bi amping is the only way to use these speakers IMHO, cleaner highs and overall clarity you will gain.

    Is this for home theatre? L, c, R?
  23. subwoofers covering different bass frequencies

    I just had a thought,

    Say you have an array of four 18 inch subwoofers, two of them are crossed to cover 80 to 40 cycles, the other two are set up to cover 40 to 20 cycles. Is there any real...
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    Those dual 15" Subwoofers really move a lot of...

    Those dual 15" Subwoofers really move a lot of air. A 1000+ seat movie theatre downtown had those installed and it just filled the room with bass and more bass. The shootout scene from Heat was...
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    There was a link to a company that produces JBL's...

    There was a link to a company that produces JBL's horns. Anyone have that URL? I forgot to bookmark it!
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