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I have something here that needs fixing ASAP Answered

Well I have this Gigatube stereo that I am borrowing from a family member. That site in the link isn't very descriptive, 55 watts per main channel..lol. We have the higher end model (they made different models of the gigatube series at the time of purchase, btw that pocket too).

Apparently from sitting up in our attic here not being used (yes it was in it's original box however), it appears to have developed a leak in the left sub's chamber. You can hear it when you turn it up anywhere past volume 10, but if I push on the plexi-glass, it stops making a vibrating sound, and it sounds fine from there.

I tried tightening up the 6 screws around the plexiglass plate, underneath the front cosmetic plate (they're actually better designed than it looks from the picture, and produce some of the cleanest notes I've heard from a stereo of it's size). Anyways, that didn't fix things, and being they screw into plastic, I did not want to over tighten anything.

Just today I took the screws out and the plate literally just fell off the speaker (if I didn't explain before, the plexi-glass seals around the front, allowing you to see the sub, but it bounces the bass back up the tube and it comes out there, from the looks of it, it's a 3rd type bandpass box). It looks like JVC glued these things on with something hard and flaky like superglue or something similar.

So here I am now, and I'm wondering what I should use to glue it back on so it makes a TIGHT seal, I have a squeeze tube of this Clear silicone transparent adhesive sealant, would this be suitable? I found this tube after my father handed me a tube of caulking and I told him only a fool would use caulking on a sub, especially one of these pups.

Sorry for the long, long, long post as usual, but I like to try to explain everything up front so I can get a answer sooner without having to wait for replies to "what is that" or lack of specifications, whatever. There's some pictures to enjoy below, don't worry I'm not bugging you guys for nothing :P

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killerjackalope (author)2008-11-01

Nacho's hit the nail in the head, the only other thing that could work but maybe not as well is hot glue from a glue gun, I've used it to plug a hole in the side of a speaker box before, it got shot. It worked just fine there but there's always a chance the plastic mightn't take kindly to the heat.

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user

I'm not sure I would want to use hot glue on these O_O. These cost my sis like $600 back when we bought them (around 700 after the tax :-( ) and that to us at the time was A LOT of money to spend on a stereo. Especially one that was rated as a "bookshelf" stereo system :S.

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Fair enough, didn't realize how pricey they were, nacho's suggestion seems safe enough anyway, I'm about to embark on a little project with a little Alba, making a nice big speaker box for it, a big long one rather than twin, the player unit shall be put in to the middle somehow, but not formed in to it unless I can figure out a way of completely rebuilding the whole front electronics without destroying it...

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Hmm.. Do PM me if you need any help/have any questions

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Well I have to figure out a way to smash the speaker box open, unless I saw the corner off one side, my main fear is that there could be a little filter for the speakers since it's got a big sub then a much smaller midrange and tweeter, the boxes are heavy so I suspect there's something other than speakers in there, granted there's still only two wires going in.

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user

. Which model Alba's do you have?

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I'm not sure, however I'm no longer able to do it with the Alba, now using the Bush which is suspiciously similar, same wonders about the speakers but some new problems to fix, starting with the fact that the Alba player unit was a good bit lighter... they're both reasonably low end bookshelf hifis, we have several, all of which are similar but different makes, I'm kind of looking to have htis project as a low risk practice project, hence why I've been demoted to the bush which is a bit rougher... The Alba I will find out about, we have all the documentation for the junk somewhere but no obvious signs, I'll do a quick google to find out... Some day I might get my hands on the Kenwood...

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NachoMahma (author)2008-11-01

. Your silicone sealant should do a good job. . Since it doesn't dry/set (it cold flows), caulking is not a good solution.

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NachoMahma (author)NachoMahma2008-11-01

. And, yes. Get rid of as much of the old glue as you can.

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Punkguyta (author)NachoMahma2008-11-01

Thank you nacho! I will do. And if all goes well, I might as well crack the seal on the other one and do that too. I'm sitting here right now listening to it just as it is, and the bass just rumbles so far even with the volume down, it's rediculous. Is it just me or am I the only one that's bought/seen one of these units?? I've only met one person that has seen a pair and that was in the store, and he thought they were "just okay" too like I do. But meh, I'm happy this stuff will work.

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NachoMahma (author)Punkguyta2008-11-01

. For normal home use, I'd say leave it alone. As hard as you drive them, it would be a good idea to "fix" the other one. . . I've seen vaguely similar designs (I have a set of BIC Venturi Formula 4's from the mid-/late-70s), but not that particular one.

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Punkguyta (author)NachoMahma2008-11-01

okay I hate to copy, but I like the way you format your messages, makes things easier to read through. .For normal home use, I'd say leave it alone. As hard as you drive them, it would be a good idea to "fix" the other one. > Yes I do like my bass, but really, you have to turn it up a good 6/8th of the volume to actually move the subwoofer cone. I just finished gluing BOTH of them, that was.....something I don't ever want to have to do again. It's rather tedious and trying to squeeze the silicone out of the tube has made my thumbs hurt like hell. They both look good and like they have a good seal, they're both sitting with the biggest books I could find sitting on top of the plexi. It says 24 hours to cure, but I'll probably leave them longer just to BE SURE. I don't want to ruin anything, and I certainly don't want to have to re-glue things, that would just suck.. I also spent quite the time trying to get all the glue off, I tried my best nacho, but only time will tell if it worked. . I've seen vaguely similar designs (I have a set of BIC Venturi Formula 4's from the mid-/late-70s), but not that particular one. > I've never heard of such a thing, could you take a picture?? Sounds interesting coming from 70's. I was thinking of emailing JVC and telling them of their fault with the glue in the subwoofers, perhaps I should ask them where they got the design.. :P

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NachoMahma (author)Punkguyta2008-11-01

> 24 hours to cure, but I'll probably leave them longer just to BE SURE
. At room temp (~75oF), 24 hours is plenty. The books will help - good idea.
.
> I tried my best
. As long as you got rid of all the loose stuff, you should be OK. I'm guessing that high heat and/or humidity caused the failure of the original sealant. Keep speakers in a controlled environment whenever possible.
.
> picture?
I don't have a functioning camera right now, but here's a brochure on EBay that shows with the grille installed (mine are long gone).
Driver layout is different than this Formula 6, but mine have the same tone controls and the bottom port (tuned, just rectangular). You'd probably like them - a bit heavy on the bass (I usually ran them with the tone controls set to max treble) and very efficient.
. I don't use them anymore - the bass and treble drivers need to be re-coned. But they make great stands for the smaller set of modern speakers I have. :)

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Punkguyta (author)NachoMahma2008-11-02

. At room temp (~75oF), 24 hours is plenty. The books will help - good idea. > Okay, so it's 1:30pm as of now, so they should be okay to hook up and try?? . I'm guessing that high heat and/or humidity caused the failure of the original sealant. Keep speakers in a controlled environment whenever possible. > I'm guessing that too, I'm not entirely sure what caused it, but I do know the whole attic heats up like an oven in the summer time, and it's been up there for a couple seasons, when I went to go get it this time, it was out of the box, and sitting on the dusty flood :-( My father must have forgot to put it back in the box last time he had it out.. I do plan to keep em in a controlled environment, my room :p .I don't have a functioning camera right now, but here's a brochure on EBay that shows with the grille installed > Aha, so that is what you have, I was looking around last night on google and found a picture of both the formula 4's and the F 6's, both look rather large and old. However, how do they sound? Oh.. shoulda read on a but further, needing recone-ing eh? That can be a difficult task, if I can remember the place in the states that I called up, they sell cheap cheap cheap re-foaming kits (well I assume they do the entire cone), or you can send it into them for a heftier price to do it for you. I'll try to remember the place's name, it was some company down in orange county I think, really nice lady I spoke with, but they didn't have any mirage kits :(

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NachoMahma (author)Punkguyta2008-11-02

. The midrange drivers were OK last time I checked, but the woofers and tweeters need new cones and suspension. . Unless it's dirt-cheap, I doubt if I will rebuild them. A friend of mine bought them new (~$300 in mid-70s dollars, IIRC) and them blew out one of the mid-range drivers. I bought them for $20, spent another $40 or so on drivers, and used them for many years. . If you want them, come get 'em. All I'm using them for is to hold up a newer set of speakers that are ~1/10th the size/weight and sound almost as good.

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Punkguyta (author)NachoMahma2008-11-02

Unless you live up in canada, I doubt either one of us would want to pay the shipping on something that big :-S

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NachoMahma (author)Punkguyta2008-11-02

. Yep. They are HEAVY. . . Glad to hear it worked out.

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Punkguyta (author)NachoMahma2008-11-02

Oh yeah and btw, I hooked the speakers up this afternoon, and they sound GREAT! Just like they did when we bought them out of the store.

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