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ADDENDUM

A few more recent lists just made their way into my hands.

2417H (757 16X) is there on recent lists.

2415: it says no equivalent

2416H: 2416H-1 is an acoustic equivalent

Quickly, checked some JBL listings for whatever equivalent or replacement, no luck. Plus 2417 not on it so no hope there. However 2415 and 2416 are present.

FYI, diaphragm wise 2415 is D8R2415,...

Hi arivel,

RE Is the design patent freely accessible?

Generally, a patent should be available to the public at the patent office in the country where it was filed.

You might even be able to...

peppes,

There's nothing wrong to try doing it yourself however its preferable to have some knowledge and/or a written reference you can trust.

Attached are pics of JBL's official recone...

peppes,

BTW, looking at your kits picture.

My all original 2205H woofers appear to have a little more cone ridges than your left 2225H recone. Maybe a couple more. The last ridge on the 2205H...

The author of the Thiele-Small parameters listing on the Unofficial Altec Web site seems to have dropped the ball for a half-dozen or so woofers i'm interested in, regarding their cone excursion Xmax...

Regarding a 24 hz Fs driver being sort of a waste to load in the A7 horn box.

To illustrate this point analogy is made here to a number of older JBL woofers being provided with quite low Fs, even...

Members may have noted that in my previous post i practically didn't say anything about these often used drivers in the A7. This wasn't an oversight, i thik these woofers require more than a line of...

.

This horn loaded Powered Altec 1209B is part of their Sound Reinforcement arsenal. This type of enclosure isn't intended for ultra low bass, its mainly designed for high output, more so when...

patallen,

The mass issue with DATS has been with us for a while now. A way to bypass the problem and getting an idea is to do your usual routine in DATS, BUT SKIP the weight step causing causing...

RE Mine looked like that a few years ago I just use a damp terry cloth rag and very carefully wipe the rubber. They look like this now. I did Google EPDM Cleaner and found the following - My advice...

MoD,

RE "LE 15 spider has (I think) less stiffer spider"

True, but it applies to spider and surround. The LE15A Vas parameter of 736 L represents a large volume of air and as such it is more...

.

The unidentified woofer doesn't appear to come from the same mother (lol), and even the GPA 416-8C as well as the 416-8B have no back vent...

Alex,

You need to know for sure what you have on-hand before thinking about any loudspeaker cabinet. This is essential since woofers don't usuallly go into any box that crosses your mind, if you...

Hi Alex,

RE "Want assembled altec 19 or other model . Cannot find plans for 19 . Can you help me ?"

Unfortunately, after checking i don't have a true Altec # 19 cabinet plans, though i've got...

MoD,

RE LE15A recone in E145 basket

I don't intend to rain on your project, i assume you know what you are doing and the risks involved.

This is a "unorthodox" mix you are trying to achieve,...

Alex,

I have many Altec plans, but i need to check in my stuff if i have one for model 19 or close to. Maybe i have something.

I don't have time for this right now but i'll look into this...

Hi Spellcaster,

I have most of the info the for the JBL D/K/E series, however the older the drivers are (e.g. D series) the lesser spec sheet details available.

For all JBL MI woofers the most...

+ 1

e.g. since you require a 12" and very low bass you might want to look at the Dayton Audio offering. A quick search on Dayton's site has shown various models available for that size and duty.

MoD,

I forgot to mention the following in my previous post.

Don't be surprised by the cab you were considering. There's a number of PA and SR cabs having an F3 bass "cutoff" in the 50-80 hz...

Hi MoD,

The -10db is likely applicable at both frequencies indicated considering the way its presented in the SR series brochure.

The cab is loaded with two 2226H (in paralell therefore 4...

Based on my JBL drivers listing

128H is 12" black, Aquaplas on cone

128H-1 is 12" black, with black Aquaplas on the front of the cone

As for passive radiators there's a bunch of them:...

Bedrock,

Other good reasons to go with the L100T in your case.

Your intended use fits more with an Hi-Fi application than control monitoring.

Going with the 3-way you'll enjoy lower...