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I've been pondering building a 4350/55 TM-3 type clone, adding a 10" mid bass and tweeter...

Not that I need such a thing. The originals look to have always been a 2-way and the horns are oak, So...

The drivers appear to be in excellent condition. I don't have any other photos of the Gauss, but these...

eso

Interesting reading through this whole thread.

I stumbled across these and am working on saving them from the wrecking ball. With the pot gone from the baffles I'm thinking these converted to...

Edgewound is Upland Loudspeaker Service, isn't he? We're connected on FB, so I sent him a message asking...

Thanks,
eso

Question for the driver experts here.

Can LE 10A motors recone as 10" midbass like a 2122?

Thanks

eso

Further Charge Coupling question: has anyone tried a mismatched series of caps to get a capacitance value in between standard values?

I.E. on a tweeter 1uF is a standard, so in charge coupling we...

The 801A used an Altec 604 8G and had the original blue Urei radial horn, not the Mantaray.

The mantaray horn was introduced on the 604 8K which was the platform for the 801AA, hence the tiny...

It's slightly confusing, but the original version of the Urei duplex was based on a 604 8G driver and was called an 801A. It was used in the 811, 813 & 815 monitors.

The 811A, 813A and 815A...

I'm surprised no one here has any input.

Having these 801AA duplexes to study has raised more questions than they have answered.

I can certainly clone this horn and mounting in my wood horns,...

Done, Thank you!

The forum platform does not seem to be allowing me to update my signature line. That system is out-of-date and I'de like to revise it, but I can't seem to find a way to do that.

Anyone have...

It's been a while since I've been here, but I need help from some of the brains here.

For many years I've been playing with and building Urei 801B duplex drivers and custom horns. The parts are...

Thanks, that is implied, but why not just draw it into the schematic?

So like this? Or doI just need one battery charging both the mid and high filters?

Old thread, but it seems like I could get the answer here.

All of the schematics I see show the point where the 9V is applied between the caps, but where does the other end of the battery land?
...

Ha! I just came across this photo linked in the Chilean Audio forum.

I made the pair of Yuichi's with the Burgundy mouth stripe. Are those Ricks? I sold them on Ebay years ago as a part of some...

The C series is tricky because Harmon completely redesigned the crossovers with the Tapped inductors making them very hard to replicate.

To stay passive and time align might require modifying the...

I haven't posted here in ages. I built a new pair of 840 crossovers at the beginning of the year. The parts count is very high, and as a result the cost is too. But they were worth the effort. Prior...

If you look further in that sig line you'll notice a 130 midbass horn. That is what I'm looking into a current production driver for. The horn design produces a very flat 65-500Hz bandwidth at about...

Do any of you know if there is a current production JBL driver with specs matching or very close to a D-130?

ThankS

eso

Try the link now. For some reason it didn't post correctly the first time.

eso

https://dl.dropboxusercontent.com/u/4500648/Audio/811B crossover.pdf

While it doesn't say so, this is the 830 crossover schematic which is the correct crossover for 1 801B duplex in an 811B...

The dimensions are there, and they accurately describe an exponential flare, not a radius. You will have to draw it up full size to make a pattern for the ribs that the skin is formed on anyway.
...

While not really germane to where the thread has gone, the 2425 drivers where used with a PAS 15" to create the coax that was the core of the Urei "B" series studio monitors. So I'd say they can be...

I'm not sure the dimensions. I did these over 10 years ago. I believe I sized them to 100 Sq. In. This is an A5 system: 515b, 288b, 1005A (tar-filled). The way I've current got them configured in my...

Not to get too specific, but the 801C 15" coax was the heart of the 811C, 813C and 815C monitors which had a single coax, a coax plus a helper woofer, and a coax plus 2 helper woofers respectively.
...