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View Full Version : 128h-1 replacement in L65 Jubal



bob wood
08-28-2009, 08:55 AM
Back in April, I asked the members of this forum about re-coning my 126A's or replacing them with 128h-1's. Because of the level of technical expertise in the forum, I got a LOT of information. ;-) Thanks, again.

I wound up finding some 128h-1's (from Dave Miller at Speaker Works in Tulsa, OK) and replaced the 126's last night. Then spent a pleasurable evening listening to favorite recordings and hearing the audible improvement the 128h-1s provide. Some time ago, I had replaced the LE-5's with a Pioneer mid-range speaker (Heresy? It seems to have an expanded range that I enjoy, so it was a good move in retrospect), and the new combination works quite well.

I notice that the 128h-1's articulate the bass in a way that the 126A's simply couldn't. The bass notes are cleaner and have better definition. I'm very pleased.

I bought these L65's when I got out of the Army in 1975, and still love them. I've heard better speakers (Dali Helicons come to mind), but I guess my old ears have grown accustomed to these things. They have a distinct personality all their own -- they're anything but neutral -- and I suppose I've always loved that classic, bright JBL sound.

So, after that homage to Mr. Lansing, I'd recommend the 128h-1 replacement for anyone who owns and loves his Jubals.

Earl K
08-28-2009, 10:30 AM
I notice that the 128h-1's articulate the bass in a way that the 126A's simply couldn't. The bass notes are cleaner and have better definition. I'm very pleased.

,,,,,,,,snip ,,,,,,,,

So, after that homage to Mr. Lansing, I'd recommend the 128h-1 replacement for anyone who owns and loves his Jubals.


You know, I feel the same way about my le14H woofs vs the earlier le14a .

I figure it is JBLs' SFG magnetic circuit that gets the credit for this .

I love the extra bit of articulation ( & I do suspect their are some here who would interpret this somehow as "less bass" ) .

( I'm not much of an alnico guy for this very reason / except of course, when selling ;) ) .


>< cheers :)

boputnam
08-28-2009, 02:23 PM
I notice that the 128h-1's articulate the bass in a way that the 126A's simply couldn't. The bass notes are cleaner and have better definition. I'm very pleased.

So, after that homage to Mr. Lansing, I'd recommend the 128h-1 replacement for anyone who owns and loves his Jubals.I've done the same, and went a few steps further after modelling predicted that the 128H-1 was a better alternative to the 2213H and 123A. I stuffed 128H-1's into both L100's and the 4312's, wired as-is-appropriate. It is a measureable improvement.

I cannot speak to the use of a Pioneer mid-range - I know nothing of it's response characteristics nor how it will mesh with the involved passive networks. The 128H swap is, however, a wonderful option. :)

midlife
08-28-2009, 02:43 PM
Any significant difference in a 128h as compared to a 128h-1 ?

boputnam
08-28-2009, 04:23 PM
Any significant difference in a 128h as compared to a 128h-1 ?White cone vs black cone, respectively. Otherwise AFAIK, the T-S parameters are identical.

BMWCCA
08-28-2009, 04:38 PM
White cone vs black cone, respectively. Otherwise AFAIK, the T-S parameters are identical.

:hmm:

The 128H (4411, L112, L150, L150A) had white aquaplas on the cone. The 128H-1 (4412, 120Ti) had dark aquaplas on the cone. Greg did tweak the 128H-1 a bit with respect to the voice coil and suspension but I doubt most people would be able to hear the difference.
:dont-know

midlife
08-28-2009, 04:41 PM
:hmm:

:dont-know!

boputnam
08-28-2009, 05:58 PM
:hmm:

:dont-know

!As I said, AFAIK, and from the db checks I can make, there are no different T-S parameters offered.

(edit)

BMWCCA has referred you back to a parallel thread you started.