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  1. 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...
  3. 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...
  4. 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 ...
  7. 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...
  8. 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...
  9. 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...
  11. 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...
  12. 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...
  13. 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.
  14. 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...
  16. I've never seen any JBL shop built 4530s with a...

    I've never seen any JBL shop built 4530s with a half inch corner round like. Are they fir plywood or baltic birch? Birch would definitely be a third party wood shop build. The triangle blocks for...
  17. I've never seen this particular model but the...

    I've never seen this particular model but the light bulb in series with a speaker driver is a widely used trick to prevent burn out. As the current thru the bulb rises the resistance increases and...
  18. For extra points use an FFT measurement app and...

    For extra points use an FFT measurement app and measure the arrival time for the woofer and horn driver individually if you want to get it down to a few mS.
  19. If there was a perceptible difference in the bass...

    If there was a perceptible difference in the bass response between a Rane and Ashly analog crossover one of them is broken. The circuitry just isn't that different. Did you test the suspect crossover...
  20. Based on my testing of Chinese knock offs of EV...

    Based on my testing of Chinese knock offs of EV DH1 diaphragms you have about a one in four chance of getting parts that match the original - or each other. Now that was ten years ago so perhaps...
  21. Because it looks good on the spec sheet and helps...

    Because it looks good on the spec sheet and helps sales to people who listen with their eyes and wallets rather than their hears
  22. That is the driver used in the current mid sized...

    That is the driver used in the current mid sized VTX20 line array box . If you've been to a show using those boxes you've heard lots of those drivers. In those boxes the drivers ( it uses three...
  23. " microdetail" in a compressed Youtube video ? ...

    " microdetail" in a compressed Youtube video ?

    There are probably ways to make valid comparisons that would involve recording with good microphones at specified distances from the baffle to...
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    Curious as to why you chose second order...

    Curious as to why you chose second order crossover filters when you had fourth order available and why you chose the 1/3 oct for the eq rather than the parametric.
  25. Waf ?

    Waf ?
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