18" woofers

[Jakob]

This weekend I've tried an 18" -woofer for use with my 250 ti's. It's a non-JBL PA driver in a box tuned to about 40 Hz. I thought it would sound terrible, but no, it sounded really good. It seems it has a quick response, and though tuned at a rather high frequency, still seems to have a lot to give down to 20 hz.

Now I'm wondering: Why should I go for the 2245? I've been told that the 2245 is a rather "slow" driver, is this true? Would the 2241 or 2242 be a better driver for me? I want deep bass of course, but not in exchange for the tightness.
I love the bass in the 250 ti's, I just want more if it!

B.R: Jakob

[4313B]

The 2242H and 2245H are excellent 18" transducers. If the 2245H seems "slow" then someone needs to look at a change in amplification. There is nothing remotely "slow" about a 2245H. The LE14H-1 in the 250Ti is considered one of the finest JBL low frequency transducers ever made. That is what you are trying to augment, and dual 2245H's would be an excellent choice.

"I love the bass in the 250 ti's, I just want more if it!"

Yep, I know exactly what you mean...

[boputnam]

Originally posted by Giskard
If the 2245H seems "slow" then someone needs to look at a change in amplification.

And by that, I think you mean increased damping factor / output impedence and not necessarily watts - 'cause we know how efficient these badboys are!

[speakerdave]

There's also the reality that woofers sold as separate drivers will often be heard poorly cabineted and the driver will get tagged for the fault.

David

[4313B]

Definitely.

[scott fitlin]

If your looking at the 2241 or the 2242 I would choose the 42, because it has better midbass transient response, and in the proper cabinet, will have that fast snap you are looking for! The 42 is an excellent high power 18, while I have listened extensively to the 2241 and dont care much for that model!

The 2242 is also one of the MOST reliable drivers, and will never blow, unless you really , really abuse them!

In a properly tuned cabinet, with the proper power, the 2242 will rock your world!

[Jakob]

I wasn't sure before, but You are ALL in fact working at JBL's sales department, right?

Well, since JBL chose the 2245 for the B460, what can go wrong?

Are they easy to overdrive compared to f.e. the 2242? I don't want the woofers to go "pop" against the backplate just when the fun begins.

I'm thinking of driving them with a JBL/Urei 6290, this should be enough power, right? My only concern is that this amp has a 2-step fan, and I have no idea how noisy it is?!

Any other PA amp you could recomend?

Thanks for Your input!

[4313B]

Originally posted by Jakob
I wasn't sure before, but You are ALL in fact working at JBL's sales department, right?

Well actually, no.

Originally posted by Jakob
Well, since JBL chose the 2245 for the B460, what can go wrong?

The 2245H was also used in the original Synthesis subwoofer and the 4645 subwoofer. It has since been replaced by the 2242H in both of those applications.

[Niklas Nord]

Are JBL going to release some new 18" driver soon?
When will we se a replacement for the 2242?


How about these new Vertec-subs ? Is there not a new
18" driver there?

[4313B]

Niklas, I asked and was told there is no replacement for the 2242H in the works. It will remain the premium go-to 18-inch transducer for "best of class" VLF applications.

[Oldmics]

"Niklas, I asked and was told there is no replacement for the 2242H in the works. It will remain the premium go-to 18-inch transducer for "best of class" VLF applications."

However

There is a newly designed speaker (2268H) using the DCD technology.

These are in the new SRX 700 Series speakers.Specifically the SRX 718S.

Makes me wonder what sales is up to?,and what will ultimatly be the best?

I have seen the new series but have not seen the driver or heard any of them.

Follow the link for a peek.

Oldmics


http://www.jblpro.com/srx700/index.htm

[4313B]

"SRX718S - 18" subwoofer"

Something tells me those won't be replacing the 4645C any time soon. I could be wrong though...

*****

It appears I wasn't. The 2268H is listed as the replacement for the 2241H as of 22-MAR-2004.

Re = 5.3 ohms
Fs = 33 Hz
Qts = 0.36
Qms = 3.8
Qes = 0.39
Vas = 328 liters
no = 2.8 %
Sd = 0.1269 sq m
Mms = 168 grams
Bl = 21.5 T*m
Pe = 800 W

Xmech = 23 mm (spider bottoms on gap sleeve)

Very nice transducer!

[John Warren]

Niklas, I asked and was told there is no replacement for the 2242H in the works. It will remain the premium go-to 18-inch transducer for "best of class" VLF applications."



18" McCauley 6174

Fs 20Hz
Vas/Qes = 1928
n =.66%
94dB/W/m
1kW RMS thermal dissipation
ship wt. 45lbs.

[4313B]

Why quote me and then post a McCauley driver? JBL isn't using McCauley drivers to replace the 2242H.

[scott fitlin]

Originally posted by John Warren
Niklas, I asked and was told there is no replacement for the 2242H in the works. It will remain the premium go-to 18-inch transducer for "best of class" VLF applications."



18" McCauley 6174

Fs 20Hz
Vas/Qes = 1928
n =.66%
94dB/W/m
1kW RMS thermal dissipation
ship wt. 45lbs.

Have you ever heard the McCauley 6174?

If you heard it you might not post about it so fast! Inefficient, 20hz rated but you dont really get anything above 60hz out of it. Takes a ton of power, and needs a ton of power just to do something. Lacks punch, lacks just about everything!

This McCauley woofer was being featured in a pro folded horn, called Bassmaxx, to be blunt, it sucked!