Difference between the 2235 and 2234.

[Midnight]

I was just told that the difference between the two drivers is the suspension.
The 2234 uses a foam suspension or surround and the 2235 uses a ridge or cardboard suspension.
Other then that, they are both identical. Does anyone know if this is true.

[Robh3606]

The difference is the 2234 does not have the mass ring attached at the apex of the cone right above the voice coil. The suspensions are the same. To make a 2234 all you do is order a 2235 kit and not install the ring.

Rob

[Guido]

Rob is (as always) fast and right.

Same Basket
Same suspension
Same cone
Same dustcap
Same Spider

BUT
No Massring

This result in higher efficiency 96 (2234) instead of 93 dB (2235) and not so extended bass response than the 2235.

[4313B]

http://audioheritage.csdco.com/vbull...ight=2234+2235

[Midnight]

As always, you guys have all the answers.
Thanks

[sebackman]

Hello Midnight and everybody else.

I have used both the 2234 and the 2235 and, as shown in “Giskards” excellent diagrams, there is a real difference in the ULB area between them.

Sound wise, IMHO, the -34 versions feel snappier and more responsive to transients, especially in the high bass/low mid area. -Of course at the cost of some low-end bass. I preferred the 34’s, as the sound was more homogenous and better “connected to the next driver in the system

We compensated for the loss of low bass by making a somewhat larger cabinet than called for, and also to port it somewhat lower that the calculations and measuring indicated. We also designed the speaker so the reflex ports were formed as horizontal slots at the very bottom of the baffle. That meant that we got some significant help from the floor to recoup some of the bass loss.

We did some tests with the 34’s in our cabinet and compared it to a 35 in an “optimal” cabinet with the tube style ports as in the 43xx monitors. The differences were not cumbersome in the low bass area but in the high bass/mid area the 34 clearly sounded better to us

When we ran the MLSSA on the two cabinets the differences in ULB area was significant smaller than seen on the diagrams on the Forum. We did the measurements in a large warehouse with high ceilings so I think the measurements results were reasonable accurate. We used an Urei 6290 amp with one cabinet on each channel so we could equalize the difference in sensitivity.

If you have an opportunity to play around with the cabinet design and the tuning I think you could get very close to the bass output of the 35 and still enjoy the, in my view, improved high bass and mid response of the 2234 version.

Best regards
//Robert

[jbl]

Hi sebackman,
I too feel that the 2234/2225 offer a greater "attack" compared to the 2235. In my system (2225, 2425, 2370, 3110A) in A 4507 5ft3 cabinet, the slight loss of low bass is a small price to pay for the more live sound I get with the 2225's. With a larger cabinet, the 2235 can't be beat for it's bass output. There is a compromise either way.
jbl

[4313B]

Well, maybe that's why JBL doesn't make any dedicated VLF transducers anymore

Get out your EQ

[4313B]

Originally posted by Midnight
I was just told that the difference between the two drivers is the suspension.
The 2234 uses a foam suspension or surround and the 2235 uses a ridge or cardboard suspension.
Other then that, they are both identical. Does anyone know if this is true.

If I remember correctly you were running 2225H's in your 4435's before you got your 2234H's reconed?
I thought you were happy with the increased performance from the 2234H's?

*****

Again, the 2225H, 2234H, and 2235H are not interchangeable. They are three distinct transducers designed for three distinct applications. They are all outstanding transducers when used for their intended purposes.