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  1. I'd find a 12" mid bass driver to go between the...

    I'd find a 12" mid bass driver to go between the 18" and the 1" horn first. I'd then build a vented box according to the TS specs for the 18, a sealed box for the 12, mount the horn on top of the mid...
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    Much as I hate to say it, especially since I...

    Much as I hate to say it, especially since I actually had some Orban gear back in the day something like that paragraphic would require a great deal of care and feeding to be usable in even a fixed...
  3. Thread: KM2

    by Riley Casey
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    Well this certainly is an amusing thread but I...

    Well this certainly is an amusing thread but I gotta ask, what is a Greek Princess?
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    I hate to say it since those Orbans were current...

    I hate to say it since those Orbans were current when I was something like that would require an awful lot of care and feeding even if used in a fixed installation, in portable use it would likely be...
  5. Thread: KM2

    by Riley Casey
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    22,084

    Not sure what constitutes "quite a while now" but...

    Not sure what constitutes "quite a while now" but I've had seventy 2261s in portable service for almost twenty years without problems.
  6. Thread: KM2

    by Riley Casey
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    22,084

    Why give up on a cone midrange? A ten inch or so...

    Why give up on a cone midrange? A ten inch or so cone mid driver would allow the crossover point to move up to 1k2 -1k5 and allow the choice of a 1" or 1.5" high frequency driver that would provide...
  7. My experience with after market Chinese...

    My experience with after market Chinese diaphragms is that you may have to buy quite a few to find a matched set.
  8. Ive got dozens of 2262 drivers in a various...

    Ive got dozens of 2262 drivers in a various speakers that I’ve been listening to for over a decade. They work great and I love how light weight they are but I wouldn’t make them a first choice for a...
  9. The Sisyphean task of sorting thru the debris...

    The Sisyphean task of sorting thru the debris field that was my warehouse continues and in the process I turned up my 1985 JBL recone documents binder from my days of trying out my high school...
  10. What you want is an old copy of JBL's "goes into"...

    What you want is an old copy of JBL's "goes into" list. This was a list of cone kits that would fit and work properly in what frames with notes on changes or mods required to accomplish the...
  11. Every D, K or E140 I've reconed with factory cone...

    Every D, K or E140 I've reconed with factory cone kits in the last forty years has had vent holes in the voice coil former and none have been made from a solid black material. Now that's probably...
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    Sandwich the spade lug between a pair of washers...

    Sandwich the spade lug between a pair of washers and tighten down with a nut on a 6/32 bolt. Insert the bolt into the wire hole on the JBL spring terminal. Yes I've actually done this and yes it...
  13. Yes, no, maybe. The general consensus is that the...

    Yes, no, maybe. The general consensus is that the 2225s are not suitable for studio monitor use as their Fs is 40 hz and not as good a low frequency performer as say a 2235 driver. That said if you...
  14. A 500 hz crossover would make life awfully hard...

    A 500 hz crossover would make life awfully hard on that 1" compression driver even if the potato masher horn loaded the driver at that low a crossover.
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    It's easy enough to test the amplifier with test...

    It's easy enough to test the amplifier with test tones to confirm that there is or isn't a high pass filter acting higher than desired for your application. Put a meter on the output and sweep a tone...
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    Not sure where you found a recommendation for a...

    Not sure where you found a recommendation for a 24db per octave filter to emulate the original JBL 5235 analog crossover. AFAIK / remember the 5235 had second order 12 db per octave crossover ...
  17. The low pass filter on the woofer is a second...

    The low pass filter on the woofer is a second order 12db per octave slope. Assuming a crossover frequency around 250hz that puts 1khz down only 24db and easily audible with a sweep tone. All working...
  18. Sensitivity of any given driver is not an issue....

    Sensitivity of any given driver is not an issue. In an actively crossed over system its a quick adjustment of the gain setting for a passband. For a passive crossover its a simple addition of a few...
  19. Or you could reinvent the 4343 using the 2202 in...

    Or you could reinvent the 4343 using the 2202 in place of the 10" midrange. That would allow moving the low to mid crossover down slightly and probably lower the crossover point between the 2202 and...
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    With the boxes on the floor the interference lobe...

    With the boxes on the floor the interference lobe between the low drivers and the 100 degree HF horn hits a seated person in the mid chest. With the boxes stacked the lobe is probably a bit above...
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    I'd suspect from the presence of the metal...

    I'd suspect from the presence of the metal corners that these boxes started life in portable service for live sound use and were repurposed for install use when the original users discovered they...
  22. W1 is a jumper allowing Altec to change...

    W1 is a jumper allowing Altec to change configurations easily. Literally a piece of wire with a plastic sleeve around it. When you diagram the crossover you'll find that it shorts something out or...
  23. Post a picture of the network with the mystery...

    Post a picture of the network with the mystery part and perhaps someone will recognize it. Maybe someone got too enthusiastic about zener diodes. Stranger things have happened.
  24. Are the components potted in tar or something...

    Are the components potted in tar or something that prevents you from simply reconstructing the crossover schematic from the crossover in hand? Even complex passive networks are fairly simply...
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    If it sounds good it is good. That said the...

    If it sounds good it is good. That said the minimum crossover frequency specced by JBL for the 2344 horn used in that cabinet is 800hz and the stock passive networks have an effective crossover point...
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