[Wrager]

Here's the 2450SL phragms being installed in my 2447H's. This diaphram is aquaplas coated Ti. Not quite as good as Be, but a lot less expensive.

 

[tuxedocivic]

Those look rad.

 

[kingpin111]

It's a shame all the cool looking stuff always get covered up and out of sight.

 

[michaelddd]

It's a shame all the cool looking stuff always get covered up and out of sight.

Agreed. For some reason, those pics reminded me of the internals of an automatic transmission. A very complicated piece of machinery.

 

[MKtheater]

Looks great, I love the sound of the 2447's.

 

[Scott Simonian]

Sweet! Tell us how you like em once you had some time listening.

 

[Wrager]

I really need to take some measurements before and after as well as swaping in the 2352 horns. I'm not real proficient with measurements. I guess it's all abot practice and trial. If nothing else, I'm sure the CD's will benefit from new phragms. Heck the originals are probably 10 years old. That's a lot of abuse. Most of these JBL drivers were used in pro sound so I'm sure (like my 2242's) were ridden hard.

I'm really curious to see if James would prefer the Radian aluminum phragms over the original Ti. I sold mine or I'd send 'em to you.

 

[MKtheater]

How much are they?

 

[Wrager]

Not very expensive, roughly $110 each. The JBL originals are twice that.

 

[Scott Simonian]

Wow! Yeah, that's way cheaper than the standard Ti from JBL.

Have you put any time into these yet?

 

[Mfusick]

 

[Wrager]

I will take some measurements. If I really get ambitious, I will compare all of the CD's I have including:
2430 (original Al for 4622HF), 2431 (Al), 2447 (Ti), 2450SL, 2447 with SL phragm. And I have the 2352, and 2380 horns.


I spent the last two days building/rebuilding my subs. With the help from gpmbc, I decided to replace the 2x2242's with EV-X180B's. I also put the TD18h+ in a 5 cu ft sealed enclosure. I had 2 MJ18's left around, so I put those in an IB manifold in the back of the room. Wow, the bass is now over the top. Not as "in your face" as before. It's just everywhere. So, crazy as it sounds, I have a tapped horn sub (DTS-10), huge ported sub (20 cu ft), sealed sub and an IB. Yikes.

 

[AV Hack]

I will take some measurements. If I really get ambitious, I will compare all of the CD's I have including:
2430 (original Al for 4622HF), 2431 (Al), 2447 (Ti), 2450SL, 2447 with SL phragm. And I have the 2352, and 2380 horns.


I spent the last two days building/rebuilding my subs. With the help from gpmbc, I decided to replace the 2x2242's with EV-X180B's. I also put the TD18h+ in a 5 cu ft sealed enclosure. I had 2 MJ18's left around, so I put those in an IB manifold in the back of the room. Wow, the bass is now over the top. Not as "in your face" as before. It's just everywhere. So, crazy as it sounds, I have a tapped horn sub (DTS-10), huge ported sub (20 cu ft), sealed sub and an IB. Yikes.

 

[gpmbc]

Glad your subs are on point once again!

 

[tsloms]

I will take some measurements. If I really get ambitious, I will compare all of the CD's I have including:
2430 (original Al for 4622HF), 2431 (Al), 2447 (Ti), 2450SL, 2447 with SL phragm. And I have the 2352, and 2380 horns.


I spent the last two days building/rebuilding my subs. With the help from gpmbc, I decided to replace the 2x2242's with EV-X180B's. I also put the TD18h+ in a 5 cu ft sealed enclosure. I had 2 MJ18's left around, so I put those in an IB manifold in the back of the room. Wow, the bass is now over the top. Not as "in your face" as before. It's just everywhere. So, crazy as it sounds, I have a tapped horn sub (DTS-10), huge ported sub (20 cu ft), sealed sub and an IB. Yikes.

Were you ever able to complete these measurements? I'm mostly interested in the 2447 compared to the 2450sl diaphragms.