JBL 4343 build.....

[NWCgrad]

Build is looking really nice. I am watching your bracing scheme with interest as I am currently building a rather large enclosure.

What do you plan to use for the seal of the rear panel opening?

[quindecima]

Build is looking really nice. I am watching your bracing scheme with interest as I am currently building a rather large enclosure.

What do you plan to use for the seal of the rear panel opening?

I don't think he needs to do that, those cabs are vented and a nice fit of the rear panel should be all that is needed. but WDIK

[NWCgrad]

I don't think he needs to do that, those cabs are vented and a nice fit of the rear panel should be all that is needed. but WDIK

Most likely more than I on the topic. I was thinking of using a 1/16" layer of cork for a similar opening. Wouldbe nice to eliminate one more purchase.

[grumpy]

big hole(s) in the front aside, you might be surprised at the level of non-static pressures in a bass reflex box...
enough to cause noises and annoying whistley(?) sounds in some cases. Some sort of pliable gasket should be ok,
as opposed to depending completely on precisely flat joining surfaces and uniform sealing pressure.

... it's possible to leave out gaskets and be ok/lucky, but note it's cheaper (long term) for mfgs to use them (or they wouldn't).

[NWCgrad]

big hole(s) in the front aside, you might be surprised at the level of non-static pressures in a bass reflex box...
enough to cause noises and annoying whistley(?) sounds in some cases. Some sort of pliable gasket should be ok,
as opposed to depending completely on precisely flat joining surfaces and uniform sealing pressure.

... it's possible to leave out gaskets and be ok/lucky, but note it's cheaper (long term) for mfgs to use them (or they wouldn't).

AM I wrong to assume they used cork for the 43xx models? I have not read anywhere what JBL used back then. Speaker gasket material (ala Parts Express seems a little to thick).

[ARMED]

As far as braces, i think im done. I used 1 inch baltic birch plywood, should be thick enough..im not going to use it in a club or something, so it shouldnt flex. Just home listening. I might turn it up once in a while when i get drunk..
For the small rear panel, i have some leftover cork sheet that used when I did my flooring..ill use that..I will also use that for the front panel. The front baffle will be removable with T nuts...

need to find some fiberglass/sound dampening and veneer....then paint

[ARMED]

almost there

[ARMED]

oorah

[Odd]

Looks very nice.
Good work!

[quindecima]

The front baffle will be removable with T nuts...


Those things suck! use threaded inserts, much nicer.

[ARMED]

i might do that, ive never used them before..

[quindecima]

Easy to use, measure the shank of the insert and drill a hole that size or a tad smaller and screw them in. Much nicer.

[NWCgrad]

Easy to use, measure the shank of the insert and drill a hole that size or a tad smaller and screw them in. Much nicer.

Do you recommend the tapered hex drive or the brass slot head versions?

[quindecima]

I have used both in different applications but I like the Hex drive a little better, I used them in my Altec build's and my 4351.

[Chas]

[QUOTE=ARMED;396336]As far as braces, i think im done. I used 1 inch baltic birch plywood, should be thick enough..im not going to use it in a club or something, so it shouldnt flex. Just home listening. I might turn it up once in a while when i get drunk..

Ah, drinking and JBL four ways.... There isn't anything much better than that!
Enjoying your build, great work.