Eco Friendly Sub Project

XEagleDriver

XEagleDriver

Audioholic Chief
While walking my AmStaff, Mr. Buddy Coltrane, in the neigborhood I saw a subwoofer at the curb for trash pick-up the next day. On a whim, I carried it home to investigate.
Upon getting home I found it was an Optimus SW-12 ported, passive subwoofer.

Nothing to get too exicted about, but it was free.

Fearing if it might have a short and damage equipment I actually paid for, I took it apart to visually inspect for damage, burnt parts, etc.

I found the following:
1) Both inductor coils in the crossover/filter were loose and hanging only by their wires (probably rattling when used). :(
2) There were nine inhabitants inside the sub: three Scooby Doo's, two Shaggy's, one Vlema and three LEGO men (construction worker, astronaut, and dude with a baseball cap and life vest ??). :confused:
Must be from a house with boys, who else would bother to turn a sub over and drop toys inside the port? :D
3) The limited amount of subwoofer fill it had come loose.
4) The woofer itself looked to be in perfect condition and there were no other obvious signs of trouble. :)

The sub was repaired by re-installing the inductors with silicon cement , gluing the fill back in place, and taking the extra step to seal all accessible interior edges with silicon caulk. To test the sub I ran a pair of speaker wires from an extra slot on a speaker selector switch to the subs input and set it in the corner of a room with no sub.

Low and behold, it works like a champ for what it is and now has a permanent home in the corner of a family room previously with just a 4.0 system of inwall speakers. Luckily, the previous homeowner had ran a set of speaker wires to the far corner of that room to support a passive sub. I never expected to use this option since:
a) Most subs these days rarely support high inputs anymore,
b) More importantly, my wife has put the cabash on A/V spending until our daughter's wedding is paid off!

Cheers,
XEagleDriver
 

Attachments

Adam

Adam

Audioholic Jedi
Very cool!

You have me envisioning a couple of boys taking turns, reaching underneath the sub and shooting figures up the port with a rubber band. :D
 
j_garcia

j_garcia

Audioholic Jedi
2) There were nine inhabitants inside the sub: three Scooby Doo's, two Shaggy's, one Vlema and three LEGO men (construction worker, astronaut, and dude with a baseball cap and life vest ??). :confused:
I laughed out loud so hard at that.

I brought my pair of A/V-1s back from the other house and when I went to rebuild them, I found that someone had taken up residence in one of them at some point. They had created a nest out of the rock wool (which must have really been unpleasant actually). I found the dried body of a small lizard, so I am figuring that is who it actually was.
 
XEagleDriver

XEagleDriver

Audioholic Chief
UPDATE: R&R X-Over

UPDATE: Did some internet research and learned the crossover is the main weak link in this product, with a crossover freq of ~240 Hz. I can only guess the original purpose was to match with some very small satellite speakers.

As luck would have it Audio Advisor had a Parasound in-wall subwoofer passive crossover , 120Hz, 12dB slope, on clearance.
Took a chance and installed it instead of the original.

Bass noticeably better, now I am able to use the sub to filter the lower freqs away from the L/R mains.

XEagleDriver
 
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