Attaching a plate amp on sonosub ?

Neil Joseph · 10-02-2003, 04:12 PM

Going to make another sub. This time I want to attach a plate amp onto the back on the sonotube. What is the best way to do this?

TimForman · 10-02-2003, 04:18 PM

Amp box ala Patman.

Neil Joseph · 10-03-2003, 12:29 AM

How do you attach a plate amp and do you have to seal it against leaks. Trying to secure a flat amp to a curved surface is posing some design challenges.

Patrick Sun · 10-03-2003, 08:50 AM

Yes, you will need to make sure there are no air leaks if you go down this road of installing a plate amp to the side of a sonotube enclosure.

It's a really pain because you have to carve out pieces of MDF/wood that have a curvature that follows the tube, and incorporate that into a "sink" type of structure that would be attached to the hole for the amp on the side of the sonotube. If you've ever seen a SVS subwoofer, they have some nifty plastic injection molding for their plate amp attachment "harness".

One of our member did this with MDF/wood, but I can't remember who it was.

Pete Mazz · 10-03-2003, 08:58 AM

If you use a 1/4" bit to route the circular end caps, just use the fall off as your curved ribs.

Pete

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Brian-K-Owens · 10-03-2003, 09:25 AM

I build mine as Pete says. As you cut the caps, use a couple of sections of the drop off to build a stand-off for the amp. But, this is the opposite of the SVS enclosures. Looks like their method could be done by cutting two pieces of wood with the same radius as an inner cap along with a backplate. This is actually how I plan to build my next one so the amp does not protrude out of the tube.

My web browser is screwed up, but here is a link to the picture of the SVS if you have not seen it:

http://www.svsubwoofers.com/images/s...cplusrear2.jpg

Brian

Tommy T · 10-03-2003, 09:51 AM

I did mine by cutting an extra endcap out of MDF. Then it was just a matter of sanding it down a little to make it flush.
Once you screw it onto the tube it's pretty sturdy. I made sure I used glue when attaching it and after the glue dried, I went around every seam, inside and out with sealant. It looks a lot more difficult than it actually is.

You can see images of how I did it on my webpage.

Tommy

Dustin B · 10-03-2003, 09:55 AM

Warren did an excellent job flush mounting an amp to his.

http://members.optushome.com.au/wcal...nstruction.htm

Check out my Tempest construction page if you want to see a way of mounting to the tube without needing to worry about air leaks as much.

Neil Joseph · 10-03-2003, 11:57 AM

Dustin, in your example, is the entire plate amp on the outside of the sonotube? If so, is that enclosure enough to allow for cooling of the amp? And did you simply make a small hole in the sonotube to allow the cables to pass through to the driver?

Please, more details?

Patrick Sun · 10-03-2003, 01:57 PM

Plate amp use their fins for the cooling. So as long as the heat sink fins are exposed and aren't closed off to air flow, cooling shouldn't be a problem.

Neil Joseph · 10-03-2003, 02:07 PM

So if you build a box just large enough for the plate amp to fit inside then this is sufficient cooling for the unit, right?