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I agree 100%
Thanks!

Yes, I have a couple of different sweep systems. If it causes a simple recursive frequency response problem I can fix that with an IIR filter but if it causes a polar pattern problem like a bunch of...

I’m working on three different high-end speaker systems using JBL, TAD and Radian drivers. I was the head Engineer for Equator Audio and love to use DSP to correct some errors but I believe that...

Yes, but what I was refering to is the impedance plot. A horn acts as an impedance matching device and a waveguide is just a patern controlling device. In the plots I saw there is a little ripple...

I'm sorry, but the 2220 is a poor woofer for normal enclosures. The only place that I have found that they work well in is a horn loaded situation like a klipsch corner horn. The Q is so low that...

Recone one of them. It's just not going to work well for you to mix 8 and 16 ohms, especially trying to get equal output. Although, I suppose you could run them across different frequencies. For...

Very interesting. You can see from the plots that it loads the driver less than the 2383, but I guess that's why they call it a waveguide not a horn. The overall responses look really good. Thanks...

Hi guys,
I'm looking at some 2385's that I picked up and have a question. I can see that the slot is about the same area as the throat. Does this cause any distortion, having the flare rate go...

Why did they opt not to use a CD design on these? I assume it was to keep the depth at a minimum, but is there any other reason?

I have just confirmed this story.
I opened up a 077 and pulled out the diaphragm. It was an original blue JBL diaphragm and under a microscope you can clearly see the pen mark. It goes all the way...

I wonder if this is because people are bypassing parts in the passive crossover that provide EQ'ing for driver correction? I know they padded down the horn but I suspect that there is probably a...

With the 2405's on top, assuming you rolloff the top end of the multi-cell, you should have no problem with lobing. The 2440's with the old softer Al diaphragms were really nice, rolling off on...

Just remember that granite can ring like a bell. I worked on a system that had a spherical granite enclosure and it was resonate! The thing would ring with a very high Q. We had to use a lot of...

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Yes, this looks good to me. Just remove both C5 caps, cut the lower 1/4" jack trace leading from it's tip connection and jump it over to the woofer connection. This isolates the lower...

Here's another 2405 story I was told.
When 2405 production was stopped due to running out of metal phase plugs they used to just grab 077 plastic phase plugs and spray paint them black. I know it...

I have heard that in the "old" days JBL used a softer alloy. Then in an attempt to enhance the life span of diaphragms and increase high freq. resp. they went to a harder alloy. The older...

Your second option is the winner.
Pull the sub off the passive crossover and drive it from a seperate amp with active crossover. The only issue will be that the mid will still be high passed so...

Hi guys,
I'm building a "mostly" JBL system and I want to hear your advice.
Firstly, here is the system:
4-2235's (20Hz - 80Hz) Sub
LCR are
2-2206H (80Hz - 600Hz)
1-TAD 4001 on 2385...

Thought you might get a kick out of this, hopefully it's new info for you.
One of the guys I work with (he shall remain nameless) working at JBL Pro for over 20 years and over the years went from...