Big Blue

[edgewound]

Hi John,

Have you considered turning a UHF waveguide for a 2407?

I think that would air out the top end nicely. Just an idea for you.

I love looking at your work

[John W]

Hi John,

Have you considered turning a UHF waveguide for a 2407?

I think that would air out the top end nicely. Just an idea for you.

I love looking at your work

Thanks Edgewound, what driver would work well for a waveguide tweeter? I haven't had much experience with anything other than the ring radiators.

[edgewound]

Thanks Edgewound, what driver would work well for a waveguide tweeter? I haven't had much experience with anything other than the ring radiators.

Well, John...

The 2407 is a ring radiator with a mylar diaphragm. Do a search for 2407.

Zilch has done some testing on them and seems very impressed with their extension and transparency....out to 30kHz. 2406 and 2407 are both mylar ring radiators, the 2407 being a very neat, tiny neo mag driver you could hold in your fist. 2406 is a ferrite version.
I have both the 2435 and 2407's. I haven't done actual testing on them, but listening to their respective smoothness with a sweep generator really raised my eyebrows. Best I've heard from JBL...period.

Both have 1 3/8 18TPI thread mount.

I bet you could physically time align them with your 2435's.

[Izzy Weird]

Wow, are those pretty horns or what?

I hope someday to hear these speakers. I also really like the traditional JBL monitor look you gave them.

Beautiful !!!

[UreiCollector]

Impressive craftmanship on the horns!! I'm impressed!

[spirou38]

I ordered a Behringer DCX2496 digital crossover yesterday so I can hook these babies up to some amps that I am more familiar with and tune in the response a little better. I’ll have to hold off on a more expensive crossover for now.
When it arrives I plan on using the digital link from the cd player and setting up some sort of 6-way volume control between the crossover and the amps. I don’t know exactly what this will look like just yet, probably 3 stereo analog pots connected with gears and a small chain or something.
Anyone done anything similar?

Hi John,

Great job

The Thierry MARTIN DCS2496 tweaking website ( in french or english ) :

http://www.dcx2496.fr/index.htm

Best regards from France.

Pascal

[John W]

Thanks for the link.
So far the dcx2496 is working out nicely. I read that one possible cause of the “frying bacon” problem was the output stage circuit board could possibly flex with the tension from the many cables and short out with the bottom of the chassis. After opening up the case this seems quite possible, since there isn’t much clearance.
The one tweak I made was gluing a stiff plastic insulation sheet between the output board and the metal chassis to prevent this from happening. I was a little surprised Behringer hadn’t done it already. I guess only time will tell if this actually prevents anything bad.

[Zilch]

"Fish paper" is commonly used for the purpose:

http://www.oliner.com/fishpaper.htm

[At the hardware store.... ]

[spwal]

your speakers are simply gorgeous. i wish i had those kind of wood working skills.

[johnaec]

So far the dcx2496 is working out nicely. I read that one possible cause of the “frying bacon” problem was the output stage circuit board could possibly flex with the tension from the many cables and short out with the bottom of the chassis.

Check this message: http://srforums.prosoundweb.com/inde...%22#msg_165617

Also, a search for "frying bacon" at that site will turn up TONS of info on this.

John

[JBL 4645]

“I love the smell of bacon in the morning” I especially liked the DIY on the fader device to control the outputs form the DCX2496. Isn’t there any off the shelf multi fader, control units that you can buy at relatively affordable prices?