2-ways

[89-300ce]

That's one hell of a thread. I think I'm learning things.
How would those drivers work on Barcelonas?

Jorg

[Zilch]

Nope. Barcelona's 500 Hz. 4552 don't play that....

See this new post re: Altec drivers/diaphragms measured today:

http://audioheritage.org/vbulletin/s...&postcount=812

[89-300ce]

O.K.
4552 crosses at 1200hz?
Other than LE14H what LF drivers go there?
Would using the Altec 288-8K drivers cross lower and thus allow more flexibility, or does that open up a whole new can of worms?
I notice that no one suggested 075's. Is this a horn preference or is the 075 more suitable to 3-ways?

Jorg

[louped garouv]

the 075 is more of an ultra high frequency (relatively speaking) device, whereas the other drivers mentioned are more upper midrange devices...

[Zilch]

4552 crosses at 1200hz?

Well, it will "play" down to 800 Hz, but that's a determination you'll have to make for yourself. I don't use it below 1 kHz.

Other than LE14H what LF drivers go there?

Anything that will play to your liking in the 1 kHz region and also provide extended bass response. Altec Model 19 is crossed at 1200 Hz.

Would using the Altec 288-8K drivers cross lower and thus allow more flexibility, or does that open up a whole new can of worms?

Yes, and yes. You're locked into an oddball throat diameter on a custom/scarce horn. If you work with 1" drivers instead, you retain significant flexibility in driver and horn options.

I notice that no one suggested 075's. Is this a horn preference or is the 075 more suitable to 3-ways?

That's a UHF driver for 3-way, and just about nobody's favorite. 077 is generally preferred for that, crossed at 8 kHz or above, but I'd look to more contemporary alternatives if it came to that.

[89-300ce]

It looks like I'm getting some LE14H cores given to me so if they are suitable I'll get them reconed and use them.

The time alignement issues are a result of the horn driver being so far back? Can a cabinet like

http://www.lansingheritage.org/image...ign/page14.jpg

solve that using the 14's? Build it narrow and deep and recess the LF driver?

Jorg

PS.
I can also get either an 075 or 077 down the road. Is it worth adding if I use a 4552 driver on the horn?

[Zilch]

That's a bass horn, and yes it may mitigate the time alignment problem.

It's an entirely different technology and has it's own set of difficulties and compromises.

LE14x won't work like that, no.

You will not likely need a UHF driver with a BMS driver, but you may want to try the combination ultimately.

[89-300ce]

One more question.
How high would a sensible person bid on some 511b's without drivers in average condition? I wouldn't be doing any building until next winter so I have time to miss a few bids.

Thanks again

Jorg

[louped garouv]

they seem to hover right around $100,
sometimes a bit more, sometimes a bit less

[Tom Brennan]

Jammin Jersey wants $150 each for 511 greenies in what they claim are like new condition. Blackies are cheaper, $125 I think.

[John]

Are either the Altec 19's or JBL 4430's considered collectable if a person where to source some originals?

Thanks

Some guys seem to think so, but even thou I own both I like to think of myself as being an owner of these speaker systems and I enjoy listening to music with them.

By the way where in Canada are you located?

[JBLRaiser]

if you decide to go with the 511B horns, be aware that it seems to be common practice to dampen the horns to help eliminate them ringing "like a cowbell"

If they are screwed down or in a box, I've not heard any ringing. I've got 811's in my 19's and no ringing yet. No foam around the opening either.

[John]

If they are screwed down or in a box, I've not heard any ringing. I've got 811's in my 19's and no ringing yet. No foam around the opening either.

Having the horns screwed to a baffle will reduce the ringing ,but it is still there but at a reduced amount. This slight ringing could be adding to the sound that all the 19 owners seem to enjoy???

[Tom Brennan]

"Having the horns screwed to a baffle will reduce the ringing ,but it is still there but at a reduced amount."

So you say.

I dunno, I don't hear any difference with the 811 screwed to the baffle and screwed and damped with non hardening modeling clay. I wonder if the energy from the driver is sufficient to excite the horn ringing in the first place, especially with the horn mounted to a baffle and only running above 1200hz as in the Nineteen.

[JBLRaiser]

Having the horns screwed to a baffle will reduce the ringing ,but it is still there but at a reduced amount. This slight ringing could be adding to the sound that all the 19 owners seem to enjoy???

to measure this ringing? Now you've got my interest. I'm all ears.