Read the plans, and look at the right sketchup!

[sine143]

i'm glad you noticed an increase in output. would you say around 3 db? (doesnt need to be exact, just rough?)

[Keryn O'Shea]

Yes mate, ultimately after doing a proper test with the v-plate, but l'd say your on the money!

[sine143]

cheers! thats like adding another cab to the stack!

[Keryn O'Shea]

Yes mate, more like getting one back!

[Chris_Allen]

Good to see you have got an improvement. Still annoying though, having to rip it apart and do modifications.

[Keryn O'Shea]

Under test with the v-plate, l noticed it had vibration, would a brace underneath be of any help? Or not in the horn path? Also thinking of one for the driver access panel.

[sine143]

o lordy. a vibration could mean a bunch of things

is it from the vplate? if thats the case, add gasket to your vplate, and handbolts so you can bolt it to the t30s.

If its not from the vplate... one of your new braces may not have been proper glued in... meaning you may have to go cab surgeon on it again

[Keryn O'Shea]

When I say it had vibration, I meant the actual v-plate vibrates but without sound, you can see it moving half an inch in the middle at 30volts, The cabs are dead to the touch up to 35 volts! They spent the last week hooked up in the shop running all day anywhere from 1 to 40 volts, and they are silent (!), my neighbour called in today to see if a new set of subs had been built because they sounded like a different set, he said it was a lower, punchier sound... he's 800 meters away & could tell that from sitting in his office!!!!!!!!! I'm going to brace the crap out of everything from now on..
I've a Wharfedale MX218B here (dual 18, 3200wrms) which I used to think was the bomb, and just for shit's & giggles, lined it up against these T30's at 30v...
absolutely no competition, the MX is greedy, heavy and lacks the feel of the horn!

[Bruce Weldy]

I put this type of weatherstripping on my v-plate....

http://www.amazon.com/M-D-Building-Prod ... 70&sr=1-59

You can get it at any HD or Lowes. Put it on the plate, then crank the screws down tight. I don't get any vibration out of the plate.

[Keryn O'Shea]

Appreciate the advice, but in light of the increases in output due to the addition of required bracing, the question I'm asking is: Would there be a potential gain in cross bracing the v-plate and driver chamber? Just like the bracing added to Omnitop rear doors. There's no vibrational noise coming from the subs or v-plate, only that the v-plate moves when the subs are put to work, that movement could be translated to output (?), rather than the v-plate soaking up the energy?

[Bruce Weldy]

Appreciate the advice, but in light of the increases in output due to the addition of required bracing, the question I'm asking is: Would there be a potential gain in cross bracing the v-plate and driver chamber? Just like the bracing added to Omnitop rear doors. There's no vibrational noise coming from the subs or v-plate, only that the v-plate moves when the subs are put to work, that movement could be translated to output (?), rather than the v-plate soaking up the energy?

ahhhhh.....so the plate is flexing? What did you build it out of? Mine are both made with two pieces of laminated 1/2" ply - to end up with a 1" thickness. They don't flex.

[Keryn O'Shea]

Yes that's it! A laminated v-plate would definately be stronger, but heavier? Is a brace inside the horn path going to affect anything? One could be fitted to the top, just have to rip the carpet off!

[Bruce Weldy]

but heavier?

Nah.....I used that special vaporwood.

Light as a feather....


With a handle in 'em, they aren't that heavy.

[Chris_Allen]

Yes that's it! A laminated v-plate would definately be stronger, but heavier? Is a brace inside the horn path going to affect anything? One could be fitted to the top, just have to rip the carpet off!

Adding a brace won't do anything noticeable but if the cabs aren't flexing, there is no need.

You could either add another sheet of ply to your VPlate or if you are worried about the 100% increase in weight, some strips of wood (maybe 3/4"?) with the ply running at 90 degrees to the top (are they called ribs?), should be enough to stop the flexing though they would be fragile in transport.

[Chris_Allen]

With a handle in 'em, they aren't that heavy.

V-Plate 9.JPG

Why does your V-Plate look better than my cabs?