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Agreed.

 

Though there is perhaps one more thing to try for cheap.  A 60 Hz tone should get cleanly through the crossover to the woofer and is both easy to find and easy to measure the voltage of.  In order to check the low-pass section without a test bench, I'd be inclined to "play" (only) some hum to the speaker and compare the AC voltage levels between the crossover input and woofer output.  Should be very nearly the same both places.  If there's substantial difference then I'd get the test bench involved.

 

Also, prior to disassembling the speaker further I'd get a calibrated mike (gonna need it anyway) and run some sweeps just to see if I was really hearing what I thought I was.  If I'd been listening to, say, old Cerwin Vegas and switched to something else, then thought the bass was lacking, well, it might not actually be...

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Desoldering was bad advice. You could have easily damaged the VC leads or the insulation on the VC itself.

 

The capacitor in parallel in the low pass part of the filter has zero effect on a DCR measurement. The coil in series would be minimal.

 

If you haven't changed out the batteries in your meter(s) in a while, do it now. Make sure you zero out the meter before taking the measurement. 

 

You can take the DCR measurement using the unused terminals (tabs) on the woofer(s). No need to desolder anything!

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1 hour ago, Deang said:

Desoldering was bad advice.

 

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4 hours ago, Deang said:

Desoldering was bad advice. You could have easily damaged the VC leads or the insulation on the VC itself.

 

The capacitor in parallel in the low pass part of the filter has zero effect on a DCR measurement. The coil in series would be minimal.

 

If you haven't changed out the batteries in your meter(s) in a while, do it now. Make sure you zero out the meter before taking the measurement. 

 

You can take the DCR measurement using the unused terminals (tabs) on the woofer(s). No need to desolder anything!

 

I will give it a try, but the digital meter is brand new with brand new batteries, and while the analog one is NOT new, it, too, has a fairly new battery....  They were both giving me the same reading....

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Where are you located.  Maybe someone can visit.

 

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If you connect  a 1.5 v battery to the woofer does it move the cone in/out relatively freely.. ?

 

 Just thinking resistance measured seems a little off so if woofers were overdriven the voice coil could be damaged and somewhat frozen. 

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How/where were they stored?  Any chance there are critter nests blocking some passages? 

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19 hours ago, glens said:

How/where were they stored?  Any chance there are critter nests blocking some passages? 

 

Clean as a whistle.  I've got got both bottom enclosures open right now, and not so much as a spider web inside.....

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Dang!  That would've been easy and cheap were it the problem.

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20 hours ago, mikebse2a3 said:

If you connect  a 1.5 v battery to the woofer does it move the cone in/out relatively freely.. ?

 

 Just thinking resistance measured seems a little off so if woofers were overdriven the voice coil could be damaged and somewhat frozen. 

 

That would seem to be a possibility...  Especially since the wrong fuses were in them (but what do I know...?)

 

Haven't tried that yet.  I will try it...

 

Thanks again  to all for all the ideas!

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Here's another tip

 

if you dismount your K33E, try to gently push the membrane on the side of the dome dust cover: if you hear a sound of rubbing is that the coil rubs in the air gap. If so, you can repair the speaker or change it, if possible make it on the 2 speakers 👍

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to understand look and especially listen to this video, especially around 0: 22s until 0: 28s

 

 

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