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See above. Three years later, I'm gonna get right on it! Cross yer fingers for 2020.

I haven't touched it since posting. I have to visit edgewound Ken soon to pick up a pair of drivers he was working on. I'll try to remember to take the Altec binder with me, show it to him. Maybe...

That's exactly right. The rub: a technical expert really should go through it with a fine tooth comb. I could hack away, scanning, typing headings like "Two 730-C drivers on 329-A horn" because...

Crazy thing is not that they were laying on the tarmac at ham swap but that I was late and it was still laying there. In fact, I nearly turned the car around half way there figuring it was too late....

Rescued Altec primary documents at LA ham swap yesterday. Have a peek at a trove of test results. Haven't counted but I'd guess a thousand or more. All the drivers we know and love, tested in and on...

I've been using the pictured crossover for over a year and I like it. Please note that I forgot to sketch in the 1uF cap in series with the 2405.

Previously, I'd used the same 13uF and 1uF cap...

I use a pair of 123As in my own vented boxes crossed via autoformers and caps to LE85s on 400hz Le Cleac'h horns and JBL 2405s rolling in above 12k. Recently, while blasting something, I detected...

Thanks Rob. Don't do windows, though. and cabinets are built.

Let's review the question. How does one determine the frequency at which the woofer enclosure's port is tuned? How do I decide a...

I've been using 4312 (mid-ranges and tweeters removed) with LE85/horns and 2405 bullet tweeter combo for a year now. First order series caps and on each compression driver, L-pads to waste dBs. No...

I've been scheming along the same lines, using the mighty thread to push them out. Lacking such a slick jack--the one in my trunk won't work--I'm currently figuring a way to rig a pony clamp and a...

How on earth do I remove 12-inchers from 4312 cabinets without trashing either the cabinet face or the driver?

I tried removing the tweeters, reaching inside and tapping on the frame. Dicey,...

My hifi pal talked me into ebaying what look to be a minty pair of 4312s. Seller claims alnico, unmodified, excellent cabinets, and my preference, all paper drivers.

I downloaded the service...