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  1. Thread: the 4th!

    by edgewound
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    269

    Hear, Hear!, Happy Independence Day!

    Hear, Hear!, Happy Independence Day!
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    It's an Electro-Voice. Probably DH1A

    It's an Electro-Voice. Probably DH1A
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    Application took some times to get the viscosity...

    Application took some times to get the viscosity right. Getting the amount right to apply takes practice. It can take a few applications to get it right. My target is within 5% of Engineering...
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    Its actually on both sides.

    Its actually on both sides.
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    Yes. Actually more accurate moving mass than...

    Yes. Actually more accurate moving mass than factory cones.


    https://www.facebook.com/UplandLoudspeaker/videos/161569375265078/

    ...
  6. 50 watts is pretty miniscule for 4345. 300-400...

    50 watts is pretty miniscule for 4345. 300-400 watts would be better.

    As for the recordings, these speakers will reveal good recording vs. not so good recordings. Actually, most any decent speaker...
  7. A couple of things come to mind from the pics. ...

    A couple of things come to mind from the pics.

    These have been refoamed. I wonder if the foam dust screen over the motor vent on the top plate has rotted and migrated into the gap. The rotted foam...
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    Maxi-Cure CA with accelerator by Bob Smith...

    Maxi-Cure CA with accelerator by Bob Smith Industries.

    FYI...that is an aftermarket recone. This is not a bad thing, with suitable parts, as long as glue joints such as this don't come apart. The...
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    Looks to me like a subwoofer/satellite system....

    Looks to me like a subwoofer/satellite system. Pretty cute, though.
  10. I responded. I produce a True Reproduction...

    I responded.

    I produce a True Reproduction recone kit for the 2245H.

    See my website for eBay links or order directly. See also my https://www.facebook.com/UplandLoudspeaker/ for videos and pics...
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    Ah yes. Your 2425 ferrite. My bad. 2420/21 AlNiCo.

    Ah yes. Your 2425 ferrite. My bad. 2420/21 AlNiCo.
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    First of all....stay safe. Have you checked...

    First of all....stay safe.

    Have you checked the L-pads for wear on the element?

    Mike Caldwell has a point about the foam pads falling apart inside and the condition of the voice coils.
    ...
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    Yes! and Thank you! I just did this for a...

    Yes! and Thank you!

    I just did this for a customer with a pair of 4320 Studio Monitors. Resuspended a pair of 2215B with new spider and surround, Full Service Teardown/Cleaning/Recharge of motors,...
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    The JBL titanium driver is more durable for live...

    The JBL titanium driver is more durable for live sound, the Radian 1225-8/1225-16 is a drop-in replacement and simply sounds better for playback monitors in the studio of hi-fi.
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    Loss of magnetic strength results in lower...

    Loss of magnetic strength results in lower sensitivity, output, damping/control of the moving assembly, loss of high frequency extension.
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    I haven't done one in the last 20 years. The...

    I haven't done one in the last 20 years. The replacement part from the factory was the a preassembled cone/voice coil/felt suspension on the cast aluminum mounting frame. Remove/replace was...
  17. That's a good choice. Maybe I can simplify the...

    That's a good choice.

    Maybe I can simplify the differences between all these different diaphragms...and drivers.

    Regardless of diaphragm impedance...The later 375, 2440, 2441, 2445, 2446,...
  18. The only difference between those two drivers is...

    The only difference between those two drivers is the exit.

    2450 has a snout flare exit of 2"

    2451 has no snout and 1.5" exit.

    Same basic motor and Coherent Wave Phase plug.

    To go further...
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    The voice coil for this kit linked is for a G125A...

    The voice coil for this kit linked is for a G125A with a winding length of .400", way too long. The winding length for the 2122H is .170". Since edgewound voice coils for the particular driver are...
  20. They are on their way back to you. Thanks, again!...

    They are on their way back to you. Thanks, again!

    https://www.facebook.com/UplandLoudspeaker/photos/pcb.2792007510889671/2792007457556343/?type=3&theater
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    Just replace it with industrial style...

    Just replace it with industrial style velcro...hook and loop fastener. As long as it holds, that's all that matters.
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    Here's what a properly reconed D130F looks like...

    Here's what a properly reconed D130F looks like with an E130 style True Reproduction recone kit.
    ...
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    Definitely an aftermarket recone. Whoever did it...

    Definitely an aftermarket recone. Whoever did it saved the factory cork gasket, as proper cork aftermarket gaskets weren't available until the last 10 years or so. Pretty decent job.
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    I just serviced a pair of L150s in the shop....

    I just serviced a pair of L150s in the shop. Reconed the 128Hs with factory C8R128H and reconed the PR300 with a True Reproduction recone assembly. The previous repair person did an awful job of...
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    Best of luck with your rebuild. The only way...

    Best of luck with your rebuild.

    The only way to make sure a speaker in that condition is going to last after a recone is to remove the top plate from motor...which will discharge the magnet by at...
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