Mounting DR piezo arrays with wooden trim

[Tim A]

One done.

Hopefully, #2 by tomorrow evening. The red isn't quite so bright in person, the flash made it a lot brighter.

[LelandCrooks]

Very nice

Your arrays look really good. They can be little b**trds to mount. Nice job.

[horst]

oh wow that looks really superb, love the contrasting shade of carpet
and the red inside just makes it beautifully ominous

[Art Coates]

I like the piezo array trim!

[DAVID_L_PERRY]

Tim, they look fantastic.

Nice to see a very clean and detailed finish. Been following your progress as and when you have posted. Plenty of work gone into those. What happened to the black port outer baffle that you detailed up ?

Dave

[Tim A]

Thanks guys!

Re the ports: I just decided to go this route. I was getting too much stuff on it with all the colors and I was afraid it would look junky. This was a bit cleaner.

Re the tweeter trim: Those are actually clamps. The tweeters are not hot glued in, I can remove them if needed.

The center piece is simply a a length of 1/2" quarter round. The outer pieces are modified Stop. I ripped them down to the width I wanted, and routed a notch on th back. The notch is slightly shallower than the tweeter frame so when it's tight it clamps the array against the cabinet.

It works great! No leaks or noise.

[Art Coates]

The tweeters are not hot glued in, I can remove them if needed. ... It works great! No leaks or noise.

I like the idea

[Tim A]

I must be going nuts. I swear this was in the DR forum titled 'Almost'.

[Bill Fitzmaurice]

I must be going nuts. I swear this was in the DR forum titled 'Almost'.

Yes, but it's too valuable a reference not to save here instead. BTW, these mounts are almost identical to those I used with ribbon tweeters on the first DR250.

[bgavin]

I must be going nuts. I swear this was in the DR forum titled 'Almost'.

The moderators move threads to the appropriate area all the time.

[Tim A]

I must be going nuts. I swear this was in the DR forum titled 'Almost'.

The moderators move threads to the appropriate area all the time.

Yes, but it was 7:00 am when I posted the response to Art and I was in a hurry for work.

I just want to make sure I'm not nuts!

[Tim A]

Number 2 complete.

Dang, these things are involved. Tedious right to the very end.

[BillyG]

Nice job. It really shows off the form.
Tim Ard wrote:Dang, these things are involved. Tedious right to the very end.
They do take a bit of time to build and there are a large number of parts. I built a sailboat a while ago and said the same thing.Worth the effort!!

[Tim A]

I had some time today so I thought I'd make this thread more helpful. Here are some shots that will hopefully clear things up for those who have questions.



The center is simply a piece of 1/2" quarter round


The trim sets on the tweeter rims and screws through the center sandwich them tight to the cabinet.


The outer trim is a piece of 1-1/4" stop ripped to about 1-1/16" wide


A rabbet makes the notch for the tweeters


The rabbet is wide enough to let the trim cover most of the tweeter rim.


The rabbet is about 1/16" shallower than the edge of the tweeter. This is important. If it's too deep, it won't push the tweeter down tight enough to seal. Too shallow, and there will be a gap beneath the trim and carpet which could result in cracking the trim when tightening the screws.


All the screws are counter sunk. I painted the entire assembly with plastic formula paint by Rustoleum called 'Hammered Metal' in black. A light coat of clear satin finished them off. NOTE: The tweeters were protected from paint spray by small wooden disc laid in the bottom of the horn. The array assembly was flipped over to let the discs fall out immediately after spraying to avoid sticking.

[Art Coates]

On my latest project, I'm framing the piezos in with aluminum "U" channel.