BillFitzmaurice.info

fitzwaddle wrote:

tomsza wrote:I bought the Bash plate amp for this thing and I'm thinking of adding a plywood panel to put in front of panel #10 and mounting the amp to that. Is there anything wrong with doing this? Like vibration damage?

You mean mount the amp in that long / sealed triangle next to the mouth (between 9, 10 and the side)?

Here is where I was thinking. Excuse the crude illustration and incorrect scale.

Seems like it would work - but of course you'd need to work out a path to run the wiring from the amp to the driver chamber, and seal off those holes - not sure if that's OK or not. Seems like the amp would be OK since its a sealed off part of the cabinet - assuming its deep enough.

Caveat: I'm just speculating, Bill or one of the builders feel free to tell me I'm full of it.

tomsza wrote: Here is where I was thinking. Excuse the crude illustration and incorrect scale.

If it fits, no problem. Like it was mentioned before, you might have a ground loop problem.

The biggest problem with an in-cabinet plate amp will be ground-loop hum, as the sub placement will, in all likelihood, be nowhere near the rest of the components.

DJPhatman wrote:The biggest problem with an in-cabinet plate amp will be ground-loop hum, as the sub placement will, in all likelihood, be nowhere near the rest of the components.

In my case, this monster is going behind my ht stuff in a corner.

Last peek at the innards before I button up the side.

Let the putty and sanding begin. The spot for the amp looks pretty good.

I put on the first coat of satin black last night and this puppy looks great. I read that for down firing, the mouth should be a minimum of 18" from the floor. Is there an optimum distance from the floor for this horn? I'm going to weld up a stand and I'm wondering if I should make it capable of height adjustment.

tomsza wrote:I put on the first coat of satin black last night and this puppy looks great. I read that for down firing, the mouth should be a minimum of 18" from the floor. Is there an optimum distance from the floor for this horn?

That depends on whether it's wall or corner loaded and the cab width. You don't want the area of the opening between the bottom of the cab and the floor smaller than that of the mouth.

Bill Fitzmaurice wrote:

tomsza wrote:I put on the first coat of satin black last night and this puppy looks great. I read that for down firing, the mouth should be a minimum of 18" from the floor. Is there an optimum distance from the floor for this horn?

That depends on whether it's wall or corner loaded and the cab width. You don't want the area of the opening between the bottom of the cab and the floor smaller than that of the mouth.

It appears it will be corner loaded (see illustration 5 posts up).

So if corner loaded, with a cabinet opening area of ~18"x26", it appears the minimum height would be ~10.64". That would save me some metal.

What about having the mouth pointing up instead?

Simpler to build, less visual impact (it'll sit lower behind the TV), and it'll still be corner-loaded by the ceiling corner.

Just put a screen on the mouth ("pet screen" or similar) to keep anything from falling into the horn.

Michel Goudeseune wrote:What about having the mouth pointing up instead?

Simpler to build, less visual impact (it'll sit lower behind the TV), and it'll still be corner-loaded by the ceiling corner.

Just put a screen on the mouth ("pet screen" or similar) to keep anything from falling into the horn.

That is an option. This room has a 12.5' cathedral ceiling and was thinking I might get better sound quality down firing. Reversing it would be more visually appealing. Where I plan on mounting the amp, it would still be out of site.

I like up firing with that nice angle corner seems like it may be the perfect extension to the horn path.

subharmonic wrote:I like up firing with that nice angle corner seems like it may be the perfect extension to the horn path.

Sounds like a plan to start with. I just put the second coat of black on the cab. Tomorrow I'll do a little driver break-in and this big guy should be ready for prime time on Sunday.