Just received Parts Express 250 watt plate amp and... (1 Viewer)

[Jim A. Banville]

...it doesn't have a "box" covering the internal electronic components. Isn't this the same basic amp as the Adire AVA250? I could've sworn I saw a picture of that amp with a box sealing the internal parts on that amp. I also don't see anything on either Parts Express website or the paperwork for the amp that refers to it being air-tight. I can also see light when looking through the RCA jacks, and since the internal parts are made of clear plastic, it must not be air-tight. I guess I'll have to build a air-tight compartment in the back of my sub's cabinet :frowning:
Jim

 

[Greg Yeatts]

I built an airtight compartment in my sub box too. Even if it did have a box, they are usually flimsy plastic. Why go to the trouble of building a non-resonant sub box to mount a flimsy plastic box on one wall.

It is a bummer though.

 

[Nathan_M]

Jim, I have this amp and have built a sealed sub with it. I have held a tissue to the amps edges and knobs and never gotten air movement. I didn't think it would be airtight when I saw it either but it apparently is. Sub sounds awesome too.

 

[Jedd]

I can also see light when looking through the RCA jacks

Are you sure you are not missing the preamp part?
RCA's and all ins/outs and switches should be inside of the plate&rubber box.

 

[Jim A. Banville]

Are you sure you are not missing the preamp part? RCA's and all ins/outs and switches should be inside of the plate&rubber box.

The circuitboard with the RCA jacks is attached to the plate. When I hold the amp up to a window in a dark room, I can see in-direct light coming through the center of at least one of the RCA jacks. I don't see an rubber box you mention. Should there be one? My amp's backside is completely un-covered (you can see all the circuitboards, etc.).

 

[Jedd]

This circuitboard with the RCA's should have rubber borders 1/4" wide and 1/2" hight, so you can screw 'em tight to the metal plate.

Hope this helps.

P.S.

Amp's backside is uncovered, it's only preamp part which is sealed. Maybe you do see light through the plate?

 

[jeff lam]

I know the 120W amp has a plastic case. I don't know why they left it off for the 250W model???

 

[Jim A. Banville]

Disregard! The light I was seeing was actually shining through the translucent pre-amp ciruitboard. The seal is there around the pre-amp board. Whew!

 

[Pete Mazz]

Adire's version doesn't have an enclosed back, either. I mounted it in a seperate box so it wasn't an issue.

Pete

 

[Jedd]

Disregard! The light I was seeing was actually shining through the translucent pre-amp ciruitboard. The seal is there around the pre-amp board. Whew!

You should be safe then.
If you going to flush it into the sub, you might think about some sort of enclosure for it, but imo it's overkill.
If you going to use it outside - you need to build a box anyway.

 

[Rick Guynn]

I think this question was raised on the PE forum a while back. The PE guys said it *is* sealed. You can go search through the archives over there if you want to be sure..

 

[Ron D Core]

Even if it was sealed, would you really want to cut out a 12" square from your nice strong box and slap a thing metal thin in its spot anyways? You could do what I will do and make a plate for the amps to sit in and hide it behind something like a couch or desk or something.

 

[Rudy H]

I have my 300-794 running open backed in my 15inch DVC's box, and I already modded it twice, no air leak problems at all!