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    If you know the transfer characteristics of the...

    If you know the transfer characteristics of the existing passive crossovers you can certainly duplicate those in the DSP as a starting point. If you have DSP settings for a similar model with similar...
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    Direct connection of the very low output...

    Direct connection of the very low output impedance of the amplifier to the voice coils will allow the best control of the speakers. The I Tech has output relay load protection that is far more robust...
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    What is a SET ?

    What is a SET ?
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    17,464

    The primary difference between the Ashly 1001 and...

    The primary difference between the Ashly 1001 and the older JBL 5234 is the crossover filter slope. 4th order with the Ashly and 2nd order with the JBL. The 2nd order filters would be as specced by...
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    It helps to remember that the very lowest...

    It helps to remember that the very lowest frequency of interest to a portable sound vender be it Clair Bros doing arena rock tours or your local bar band is the 40 hz low E on a bass guitar. Trucking...
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    Nice to see a clear explanation of the reason to...

    Nice to see a clear explanation of the reason to crossover into the 2344 no lower than 1K2 hz.
  7. Thread: Jbl 4520

    by Riley Casey
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    By the time JBL published the W18 horn plans it...

    By the time JBL published the W18 horn plans it had become pretty clear that the 4520 in either a stock dual 15 but even more so with the dual 18 versions were really unwieldy in portable use and...
  8. Modding 2226 drivers for more better LF performance

    I've been listening to a pair of 2226H drivers as the low end of my living room stereo for years now. The boxes are some 5 cubic ft enclosures originally designed for Altec 604s. I added ducts to the...
  9. Thread: Jbl 4520

    by Riley Casey
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    3,499

    Dual 18 versions of the 4520 were popular with...

    Dual 18 versions of the 4520 were popular with portable rock concert sound vendors in the late 1970s. I know that RCI Sound near Washington DC was one company that built those and I[d imagine...
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    The BSS crossovers were game changers at the...

    The BSS crossovers were game changers at the time. They were the first widely available crossovers to use the 4th order LR filters The crossovers widely available prior were the Ashlys using 2nd...
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    I have a 2202H that I reconed with a factory kit...

    I have a 2202H that I reconed with a factory kit in 1987 ( old enough to have used the brown glue ) and the speaker sat in a box in my shop ever since. I found another 2202 frame a couple of years...
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    TBH this is where a DSP implementation shines as...

    TBH this is where a DSP implementation shines as all of this functionality can simply be one of many presets. Conceivably one could implement a digitally controlled analog device for the diehards a...
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    Aside from the silly stuff like the .5db 100 step...

    Aside from the silly stuff like the .5db 100 step attenuator thats a pretty good description of the old BSS FDS360 crossover.
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    Connecting a DVM to the speaker terminals simply...

    Connecting a DVM to the speaker terminals simply tells you that there's a coil of wire in there, reassuring but not terribly useful. If you want to ascertain that the woofer is doing something useful...
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    While the MiniDSP is certainly very capable if...

    While the MiniDSP is certainly very capable if you want to stick with analog the circuitry in the B63 is much more 'repairable' than a Crown amp. Might give that a try first.
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    It would be good to describe exactly what your...

    It would be good to describe exactly what your application is. Large folded bass horns are a relic of the days when high powered amplifiers delivered 100 watts to speakers that barely survived 60...
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    How are these not tuned ports?

    How are these not tuned ports?
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    " Install the diaphragm and with the securing...

    " Install the diaphragm and with the securing screws only finger tight ... "

    Sorry if that wasn't clear enough. My suggestions are based on decades of repairing speakers & installing...
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    Yes connect the smart phone headphone jack output...

    Yes connect the smart phone headphone jack output to the amp with a mini plug to RCA plug adaptor cable. Works fine although may be about 6db higher output than most hifi equipment so again start low...
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    This is an excellent phone app for anyone who...

    This is an excellent phone app for anyone who wants to test speakers of any kind. The basic app does everything you would need for what you're trying to accomplish here but some of the add ons are...
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    B&C makes some nice horns. 2380s and 85s were...

    B&C makes some nice horns. 2380s and 85s were very widely used here in the US so lots of them out there if you wanted to pay shipping.
  22. From a signal to noise perspective running the...

    From a signal to noise perspective running the sound card just below full output and keeping the power amp level lower should yield best results. I'm not familiar with most of the model numbers...
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    I'm a fan of a lot of the shows on WOWD in Takoma...

    I'm a fan of a lot of the shows on WOWD in Takoma Park but it's pretty low bit rate stream. Bob Boilen who does the Tiny Desk shows on NPR has a show with a good selection of music I've never heard...
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    The Apple lossless format is indistinguishable...

    The Apple lossless format is indistinguishable from FLAC for me and if you're already in the Apple ecosystem it makes life easier to stick with the iTunes / Apple Music app universe. AAC compressed...
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    Nice mass ring there too ;-)

    Nice mass ring there too ;-)
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