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matsj
11-22-2006, 12:35 AM
Is there any new driver i can use instead of 2235. I have 2226h to my other speakers and i want to build something with my 2450+tractrix horn and midbass driver. My 2226 doesnīt go so low in hz and i think the 2235h is good but old, so is there some other driver i can use ( 1500al :D but expensive)

regards mats

Guido
11-22-2006, 05:21 AM
There is no real substitude for the JBL 2235H :(

But they are available from time to time on ebay and recone kits are also available. Why substitude?

I would like to correct your sentence:
They are old but good!

toddalin
11-22-2006, 09:45 AM
Is there any new driver i can use instead of 2235. I have 2226h to my other speakers and i want to build something with my 2450+tractrix horn and midbass driver. My 2226 doesnīt go so low in hz and i think the 2235h is good but old, so is there some other driver i can use ( 1500al :D but expensive)

regards mats

Yes, you could use a W15GTI. I've done testing on ours and find that it has better bass response than my 2235s, yet still goes out to 1KHz. You give up about 1 dB of efficiency, but with its 700 wrms rating and greatly extended cone excursion, it can actually go a few dBA louder. Still not cheap, but readily available.

And, I don't think you ever need to replace the surround, so in the loooong run, you may save $$$.


http://www.largescaleonline.com/eimages/lsolpics/Team_Member_Pics/toddalin/center-2235-w15gti.jpg

Robh3606
11-22-2006, 10:09 AM
Is there any new driver i can use instead of 2235. I have 2226h to my other speakers and i want to build something with my 2450+tractrix horn and midbass driver. My 2226 doesnīt go so low in hz and i think the 2235h is good but old, so is there some other driver i can use ( 1500al :D but expensive)

That's a tuff one. There are not that many drivers that can cover the same bandwidth as well. Since you are going to be using a midbass driver why wouldn't you use them?? You can always go to 2245's if you have the room. Looking at new drivers the Le-14H-3 comes to mind but it's not all that easy to get and you loose a little efficiency.

Rob:)

matsj
11-22-2006, 10:24 AM
Robh3606: I have 4 2245h and 2 2243h.

I just want to make a nice speaker such as Array 1400, but with 2450j+tractrix horn and a woofer under.
I have found 2 2235 for a good price and i think i will go with them.
I must search for how big the box will be.

Toddalin: I have looked at w15gti and think itīs a great driver, but it needs power. And i donīt want a big amplifier to this system.

I feed my cinema system with 9,5kw.

mats

matsj
11-22-2006, 11:54 AM
I have search the forum for a box to 2235h and i found a 5 cu ft box tuned to 29 hz. I want it to play from 800hz and down as far it goes.
Am i right that the 5 cu ft box isnīt is a sub box or ?

mats

Zilch
11-22-2006, 12:56 PM
Yup. Think 4430, but tuned a little lower than them. 2235Hs run in 5 cuft here, mostly....

matsj
11-22-2006, 12:57 PM
Is there 2 versions on 2235 ? A friend says he doesnīt have foam surround on his 2235.

mats

Zilch
11-22-2006, 01:04 PM
No. They are not 2235s w/o foam surround.

matsj
11-22-2006, 01:12 PM
Thanks zilch.

I hope i can buy some wood on saturday. How about the ports , in the fronts or back. I can have them 1 meter out from the wall.

mats

toddalin
11-22-2006, 02:27 PM
Toddalin: I have looked at w15gti and think itīs a great driver, but it needs power. And i donīt want a big amplifier to this system.

mats

Maybe you or me is missing something here. The W15GTI does 92 dB@1m/1watt. The 2235 does 93 dB @ 1m/1watt. So at the same power level, you loose 1 dB across the band. I can't really see how a 1 dB difference would require you to super-size the amplifier.

Now consider that the W15GTI does 4-6 dB MORE than the 2235 down between 20-35 Hz, and it seems to me, you could see a net benefit with the W15GTI. :blink:

toddalin
11-22-2006, 02:31 PM
Is there 2 versions on 2235 ? A friend says he doesnīt have foam surround on his 2235.

mats

It's possible/probable that he has 2225s or a prior owner had 2225 cones put on 2235s. If the latter, it is easy to see how one would think they came this way from thje factory and come to a similar conclusion.

Thom
11-22-2006, 08:48 PM
Is a w15gti actually an effective subwoofer in a 1.5 foot box like I've heard? Kind of interested in just what the optimum box is. I've been led to believe that sealed is more acurate. Was making a box about the size of a side by side refer for a pair of 4240 and marrage wasn't in jeaperdy but this will be better.

mikebake
11-22-2006, 08:57 PM
Maybe you or me is missing something here. The W15GTI does 92 dB@1m/1watt. The 2235 does 93 dB @ 1m/1watt. So at the same power level, you loose 1 dB across the band. I can't really see how a 1 dB difference would require you to super-size the amplifier.

Now consider that the W15GTI does 4-6 dB MORE than the 2235 down between 20-35 Hz, and it seems to me, you could see a net benefit with the W15GTI. :blink:
What about transient response for this driver vs. 2235. That might be a different story, yah?

Zilch
11-22-2006, 09:04 PM
http://manuals.harman.com/JBL/CAR/Boxes%20and%20Parameters/W15GTi_rev_f.pdf

http://manuals.harman.com/JBL/CAR/Boxes%20and%20Parameters/W15spl_f.pdf

matsj
11-22-2006, 10:06 PM
Itīs a lot easyer to find 2235h here in sweden. I have to pay 200$ for a 2235 and if i find a w15gti they want around 700$ for it. I donīt think they have sold more than 5 w15gti here in sweden :( .


mats

mikebake
11-23-2006, 01:38 PM
What I meant was more like "is the w15gti capable of the resolution of the 2235"?

johnaec
11-23-2006, 04:42 PM
What I meant was more like "is the w15gti capable of the resolution of the 2235"?I'm curious about this also. The Sub1500 has similar suspension/usage characteristics, and while it'll do 1Khz easily in my live bass guitar setup, (even though I have a 2118H for this range), I'd really be concerned about its transient response much above around 150-200 hz.

John

mikebake
11-23-2006, 05:30 PM
I'm curious about this also. The Sub1500 has similar suspension/usage characteristics, and while it'll do 1Khz easily in my live bass guitar setup, (even though I have a 2118H for this range), I'd really be concerned about its transient response much above around 150-200 hz.

John
Yup. I mean, c'mon, it wasn't designed for it anyway, right? It is a higher mass sub driver. I've not bothered to even listen to mine above 150, but then again, particularly in your application, who cares? It's still possibly better than alot of what else is out there in the higher regions. That drivers like the 2235 gave great performance up high is still such a neat thing in my book. I'm kind of a diehard 3+way guy, though. Giskards ideas on a 1200Fe/435Be two way sure sounds enticing though, in a scenario supported by a nice sub.

matsj
11-27-2006, 01:10 AM
I bought 2 2235h in good shape and i will get them in the end of this week :D . Can jbl 3110 crossover be a good choice if i only want 1 amp?
I will have a 2450j with a tractrix horn above.

Jumble here on Lansing is selling 3110 crossovers.

regards mats

Zilch
11-27-2006, 03:04 AM
It depends upon whether you're going to add a tweeter on top, and if your Tractrix horn will support VHF.

3110A will provide adjustable HF boost, which MAY work for you better than the older 3110. With either, you'll likely have to pad down the HF an additional ~6 dB.

Read this thread for two-way:

http://audioheritage.org/vbulletin/showthread.php?t=12420

And this one for three-way:

http://audioheritage.org/vbulletin/showthread.php?t=9221

matsj
11-27-2006, 03:48 AM
Thankīs zilch. The 2-way thread is looong.

Iīm not going to add a tweeter on top on this project. Only 2 way. I will have a integrated amplifier to this speaker in the beginning. Maybe a old Mcintosh, Accuphase or something similar if i can find someone to a nice price.

I have to check the diffrence for 3110 and 3110A. I donīt think i need a HF boost, maybe a LF boost and a VHF boost :D . Where is the HF boost in freq ?

regards mats

Zilch
11-27-2006, 12:49 PM
http://audioheritage.org/vbulletin/showthread.php?t=5376

matsj
12-01-2006, 09:02 AM
Thanks again zilch.

My speakers didnīt show up this week :( , i have to wait untill tuesday :) . I bought 2 in good conditon and 2 baskets for reconing.

Now i canīt deside if should go with active or passiv crossover :blink: . I can buy 2 jbl 3110 from jumble in Finland or i can buy one amp more with Dbx driverack 260.

If i go active i can adjust the levels to each driver, and if i go passiv i donīt need so much equipment :blink: .

regards mats

HipoFutura
12-01-2006, 12:41 PM
Matsj, I have a pair of 2235H's packed away waiting for me to build a pair of enclosures. To get the most out the the 2235H in a small enclosure (5 cu ft) it needs a db boost in the 25 hz range. This is documented in several previous posts. If you put the drivers in a larger enclosure you wouldn't have to make this compromise. I picked up an Ashley EQ which can give a 6 db bump at 25 hz. Don

Thom
12-03-2006, 03:06 AM
How did you treat your w15gtI, ported, closed stuffed, empty?
I'd like to know. I got a sheet suggesting how I might get the most spl at the cost of sound quality hardly what I was looking for. Small box, sealed, stuffed almost no time doesn't appear to be very efficient at all. (comparing to a cheap klipsh sub not efficient JBL's. Just curious.

toddalin
12-03-2006, 10:52 AM
How did you treat your w15gtI, ported, closed stuffed, empty?
I'd like to know. I got a sheet suggesting how I might get the most spl at the cost of sound quality hardly what I was looking for. Small box, sealed, stuffed almost no time doesn't appear to be very efficient at all. (comparing to a cheap klipsh sub not efficient JBL's. Just curious.

My W15GTI is used as a sub and shares the cabinet with my center channnel (2235/LE175/075). The cabinet has three chambers, the two aoutter chambers are each 4 cu ft with the W15 in one and the 2235 in the other. Both are ported to the front with a 4" dia x 9.5" long PVC pipe. The inner chamber is 2 cu ft and includes the horn/tweeter/x-over. This chamber is ported to both outter chambers, also with a 4" x 9.5" pvc pipe and is ported to the front (with a 4" x 9.5" PVC). (Cabinet used to have two 130As with one used as a sub.)

I'm about to replace the N1200 crossover with the "keeper" and when I have the cabinet apart, I may open the center chamber to the 2235 side (making it about 6 cu ft) with two ports and block the port from the center to the W15GTI side leaving it at 4 cu ft with one port.

This would probably add some bass to the 2235. The W15GTIs are made to operate in cabinets of 4 cu ft so this shouldn't be a problem.

http://www.largescaleonline.com/eimages/lsolpics/Team_Member_Pics/toddalin/center-2235-w15gti.jpg

toddalin
12-03-2006, 03:11 PM
Rob3606,

The components were purposely mounted low in the cabinet because my Mits 45" table top used to sit on top. The extended distance from the components to the top of the cabinet helped reduce (but did not eliminate) color aberations. And yes, all drivers are Alnico. Now that I use front projection with a Stewart screen sitting on the cabinet, it would be nice to have the components mounted higher. (Notice the black stand underneath the cabinet that was added at the time the projector to raise the drivers a little.)

The cabinet angles back (like an L200 but not as much) so it's not a simple matter of flipping the cabinet over. The baffleboard would need to be flipped and it's screwed/glued in place, so that's not gonna happen.

Robh3606
12-03-2006, 05:02 PM
The cabinet angles back (like an L200 but not as much) so it's not a simple matter of flipping the cabinet over. The baffleboard would need to be flipped and it's screwed/glued in place, so that's not gonna happen.

Yes that's why I deleted the post. The 075 would end up lower.

Rob:)

matsj
12-05-2006, 10:58 AM
I got my 4 2235h today and they are so nice as the seller said they were.
I have to recone 2 but thatīs in the future.
Yesterday i bought 2 2242hpl to my collection of 18" drivers. Now i have 4 x 2245h, 2 x 2243h and 2 x 2242h :D .

Hipofutura: I have some 18" subs if i donīt they play so low as i want. I think the 5 cu ft is a good compromise.

regards mats