2435HPL vs. 435Be

[johnaec]

Don't they use the 2250 in a front "slot" loaded enclosure? I wonder how it'll sound as a plain direct dadiator? 'Probably real good, at least in its range...

John

[speakerdave]

Hey, John,

Yes, that's right, and I'm not aware of another application. That and the 2435 are really very raw material. It's a challenging project, but with some prospects for significant success. The 2250 might actually be the key element.

I don't have much in the way of test equipment, but I do have a VTVM so I suppose I could begin by ascertaining the resonance point of the 2435.

David

[subwoof]

I'm thinking of customizing a pair of 2102H by replacing the surround with foam and relaxing the spider...but that 8" 2250J looks nice...

Or maybe getting the 10" 2251J as used in the HLA..?

2405
2332 / 2435HPL
2012H*
1400Nd
1400Nd

enclosure of soild ash and similar to the 250ti in appearance.

has preliminary spousal acceptance factor ( at least it's not the 4345 "refridgerator" look... but cost for those mids....ouch

sub

[jim henderson]

See http://www.dovecanyontech.com/personal/jbl2435-2.htm

Sandwiching the 2332/2435HPL between a 2012H and a 2405 might work perfectly. The upper crossover point should probably be near 9 KHz. What crossover freq would you use for the 2012H?

[subwoof]

Well a urei 525 will be used in stereo 3 way so it will be passive to the 2405's at around 10K.

The 525 will have seperated ( cocentric ) freq controls to allow under / overlapping and independant freq counter switches. The coupling caps will be bypassed, the transformers ( and totum pole ckts ) will be bypassed and the usual powersupply stuff....

sub

[jim henderson]

subwoof says the 2435 diaphram should *stay* in the driver when the cap is removed. My 2435 diaphram stayed in the cap. How should the diaphram be affixed?

[tomp787]

Hello,

Is the aquaplas 2430 mentioned above available from JBL?

Thanks,
Tom

[mikebake]

Originally posted by subwoof
Well a urei 525 will be used in stereo 3 way so it will be passive to the 2405's at around 10K.

The 525 will have seperated ( cocentric ) freq controls to allow under / overlapping and independant freq counter switches. The coupling caps will be bypassed, the transformers ( and totum pole ckts ) will be bypassed and the usual powersupply stuff....

sub

Mike;
Let me know when/if you end up with a realized design; maybe something for me to copy if you like it.
MBB

[Don McRitchie]

Originally posted by tomp787
Hello,

Is the aquaplas 2430 mentioned above available from JBL?

Thanks,
Tom

Not to my knowledge. JBL had offered to do this as custom work just for Project May until they offered us the 435Be driver instead.

[speakerdave]

Originally posted by subwoof
I'm thinking of customizing a pair of 2102H by replacing the surround with foam and relaxing the spider...but that 8" 2250J looks nice...

Or maybe getting the 10" 2251J as used in the HLA..?

2405
2332 / 2435HPL
2012H*
1400Nd
1400Nd


sub

Subwoof,

Looks as though we've been thinking along similar lines.
Couple of questions:
Why the 2332 instead of the 2313?
How are you using the 2 1400nd?

David

[speakerdave]

I think the JBL speaker closest to what we're talking about here is the 4348.

Interesting to note that they used the 2251J (10" neodymium) and not the 2250J (8" neodymium).

Can anyone identify the midhorn used in that speaker? Is it available as a part over here? It looks like it might be just the horn for the 2435.

They used the 435AL driver. Does anyone know the differences/similarities of this driver and the 435Be or the 2435 or 2430? Functionally, I mean?

David

[subwoof]

OK - what's the 2313?? I am not near my library due to home remodeling projects...

I have some 2352's if size isn't an issue..

The 2332 is a nice size ( real close to the 2308 footprint on a baffle ) and is black... 90 degrees and minimum vert dispersion.

Haven't decided on the 1400 chamber issue but look at this thread:

http://audioheritage.csdco.com/vbull...highlight=1400

I have (9) urei 65-5 amplifier modules to power all this with so I *can* eq a bit...

sub

[speakerdave]

subwoof: "OK - what's the 2313??"

Isn't that what you called your shortened 2307?

David

[subwoof]

oh yeah.....it's been a REAL crazy 2 months here....those are STILL sitting on a shef awaiting installation....:0)

And I never have been real crazy about using plastic / metal plates to obstruct the sound either...

mike

[speakerdave]

Well, I personally think the "2313" is a gem of an idea.

I understand about the remodelling projects. My speaker plans are months behind because of a big plumbing project that needed to be done. And to some people a grown man messing with speakers looks like a person in need of some suggestions.


David