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What can I do with these???

Hello again, I want to bug you guys again, if you remember, I just fixed these JVC speakers as the seals were gone on the plexiglass. Now that's fixed, I've been noticing that when I play almost any song past volume 20-22 I can really notice a lot of turbulent noise from the tubes, and it's not the seals this time, they seem to be holding out. It just sounds punchy and the noise coming from the tubes kind of ruins the fact that I fixed the seals already, theres 4 screws around where the tube goes into the subwoofer chamber, but I tried taking it out, but it still wouldn't come off even though the 4 screws were removed. Does anyone have suggestions on how I could make these speakers sound better??

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NachoMahma8 years ago
. Stuff a little light-weight insulation in the tube
Punkguyta (author)  NachoMahma8 years ago
Really? I have some old yellow insulation I pulled out of some psb's, would that suffice?
. Worth a try. You may end up blowing the insulation out into the room. . As per KJ, check that nothing protrudes into the airway. . You're probably overdriving the speaker.
Punkguyta (author)  NachoMahma8 years ago
>You're probably overdriving the speaker. . No, I watch the subwoofers when I turn it up, they don't start pounding even close to their full excursion until the volume is turned up to 26-28 (max is 32). These little woofers have some thrust to them, I should have taken pictures when I removed one of the drivers, they had surprisingly large magnets for being 6" woofers.
. How do you know what the proper excursion is? Do you really think you can tell by eyeballing it? If they sound crappy at higher volume, then you're overdriving them (or the amp). Doesn't matter where the volume knob is set or how big the magnets are.
Punkguyta (author)  NachoMahma8 years ago
Well I figure overdriving a driver is when they're close to bottoming out, these subwoofers are no where close to bottoming out when I drive them. They are also paper cones, would could explain why they sound odd to me, compared to my poly 12" car sub.
Ya but if you overdrive an Amp it basically outputs DC, and this sounds horrific and it can also overheat your voice coils and damage the speaker, or even distort the coil which will end up causing it to drag against the magnet (( this sounds horrible to, but if you can push the speaker in and out and you hear nothing it's probably ok ))
Punkguyta (author)  Big Bwana8 years ago
Isn't it the other way around? It outputs too much AC?
. Nope. BB is talking about [http://en.wikipedia.org/wiki/Clipping_(audio) clipping].
Punkguyta (author)  NachoMahma8 years ago
I just fired these up today, and apparently one of them has developed yet, another vibration, the left one again actually. It's the tube this time, if I push down on the elbow it stops, I just tried tightening the screws but apparently that did nothing.
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