How can i ......


get a woofer out of the cabinet ?

I have a good sized subwoofer with a 15" driver that i'd like to do some internal mods / repairs to. In order to do this, i have to take the woofer out as it is the only reasonable sized access point to the internals. The problem is, i can't get the rassafrassin' driver out of the box. I have tried everything that i know to do this without going "bonsai" on it. I almost think that the driver was not only screwed in but also glued in place.

The woofer is a JBL 2235, so it is a sturdily built driver. All of the screws have been removed that hold the driver in place and the rear hatch for the binding posts have been removed. Having done that, i can push directly on the rear of the driver and NO luck what so ever. I have even tried pushing on the driver from the rear while my brother tried to pry the driver out from the front using a large screwdriver as a wedge. The only result of that effort was a small amount of damage to the baffle from the screwdriver digging into the wood. Luckily, that is all hidden under grille cloth.

Short of resting a 2 x 4 on the back of the driver and whacking it with a hammer a few times, has anybody got any suggestions ? This one has been a real ....... to say the least and i want to get it out of the house. It is a gift for my Dad, so it can take up space over there once i can figure this out and get it done. ANY help or suggestions appreciated ( short of a stick of dynamite ) : ) Sean
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sean

Showing 3 responses by sean

Thanks for the ideas guys but i forgot to mention one very important detail. That is, the woofer is flush mounted i.e. countersunk so that the outer edge of the woofer is flush with the baffle. As such, you can't really get behind the edge of the basket with anything, hence the small "chunking" of the cabinet when we were trying to pry the driver out. As such, the filet knife ( very sharp and thin blade, which was great thinking ) would probably just snap off due to the severe angle that would be required.

As far as the heat gun goes, i don't think that i can get one in from behind the driver as there just isn't any room to get into the box any other way. That's why i have to remove the driver to begin with i.e. to get access to the internals. There is no way to heat things up from the front without doing massive damage to the surround of the driver. That was a good suggestion though.

How about "round 2" now ? : ) Sean
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Thanks for all the help and suggestions.

As for attachments from the rear of the driver, i can't find anything. As it is right now, i have limited access to getting into the cabinet though. This makes everything rather difficult. The funny thing is that this is an older subwoofer and all of the glue that was used on the binding post plate and ports ( 2 of them ) is still holding like it was freshly applied. I had a helluva time just getting into the box at all. I guess that they built things to last 15 years ago and didn't plan on having to do maintenance EVER : )

In case you are wondering, this is a big, old Sumo Samson that i found at a local shop. It is about the size of a big end table ( 29" long x 22" tall and 19" deep ) and weighs 120+ lbs. I can't believe how good of shape this thing is in, especially for its' age. Factory specs show 25 Hz - 120 Hz +/- 1.5 dB's and with the JBL that it has inside of it, should produce GOBS of output and take a real beating.

Due to the physical size and the fact that it is passive ( requires external amplification), they couldn't give it away to the "make it small, simple and hook it up for me" HT crowd. As such, i was able to snag it for $40 and they even helped me load it into the vehicle : ) At that price, i couldn't pass it up as i could sell the JBL ( which looks brand new ) for 2 - 3 times what i paid for it. Since my Dad doesn't have a sub and only has two 10's and two 8's in his HT mains ( how it must feel to be deprived ... ), i figured this would help him out : )

If worse comes to worse, i will probably end up cutting a section out of the back panel, installing a high quality "plate" amplifier and adding stuffing to the cabinet to make up for the loss of internal volume that the amp takes up. Does anyone have suggestions here in terms of a good plate amp ? Obviously, i'd like something that is well built, offers great control and a "good" amount of power. Clickable links would be nice and yes, i'd like fries with that too : ) Sean
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Gunbei: Maybe i was thinking of "bon voyage" due to the thoughts of having to hit the driver with a hammer / 2 x 4 to dislodge it : )
Audiophanatik: I'll have to try that.

Corona: kind of "advanced but still gentle" thinking. I like it. A lot more work than a hammer and 2 x 4 though : )

All you other guys are gonna have me either high ( using chemicals ) or destroying the driver or cabinet : (

I'll see what i can come up with Friday as i have the day off. Hopefully, i can get this done and catch up on a few phone calls to "fellow Agoner's" that probably feel that i've "neglected" them and their problems. As you can see, i've got a few of my own.

Thanks for all the help so far and feel free to continue on : ) Sean
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