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Thread: Building an Enclosure Around a D.A.S D-401 2395 Clone

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    Building an Enclosure Around a D.A.S D-401 2395 Clone

    I bought a pair of D.A.S. lenses and horns which are the same size as a 2395. I am thinking of building a 4350 box and replacing the mid with the D-401 and using a 2402 for the high. Would this work? I would have to use woofers that go up to 800 Hz. What woofer would work, and would the port size have to be changed?
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    Last edited by robertg; 08-02-2017 at 11:03 AM. Reason: changed 4530 to 4350

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    Nice did you just get those off eBay? I have the same horns. D.A.S had those and another model that was a very similar to the smaller Jbl lense. Spec sheets are on the web if you search. The horn as far as I know is identical to the shape of the jbl horn. There are some pics somewhere on the web with dims comparing the horns with dims. Gary Stewart tipped me off on the D.A.S horns awhile back. If you don't end up building enclosures at the very least you want to cover up the backs. I did mine by replacing some of the spacers with small wood blocks which gave me something to attach to. I used some 1/8 thick wood that I lined with felt. I'm not home now but I'll snap a pic when I can.

    Al

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    Senior Member RMC's Avatar
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    Hi Robert,

    2395 and 4530 are short-throw devices (up to 75 feet for 4530) whereas 2402 (40° conical dispersion) is a long-throw tweeter... You'd be better off using the 2405 type tweeter for better balance, dispersion and similar "reach". The original compression driver for 2395 horn/lens assembly was the JBL 2440. The original recommended drivers for the 4530 boxes were JBL 2205H (replaced by 2225H) and E-140 15" which may be difficult to find in original state or with original recones... So, then look-up Thiele/Small parameters on JBL's Web site for the best drivers (2205H/E-140) and try to find a new driver with as close as possible T/S to those to load your 4530 boxes, as well as with response > 800hz for x-over purpose. The 2225H was not recommended by JBL for 4530 use (see T/S) but some people did use it with success they said, and it was the only "suitable" (closest) one left at that time in the JBL catalog.

    There is no port in a 4530 but rather a rear-loaded folded horn (scoop). No need to change the dimensions of that. If you did it may not work correctly (according to specs).

    Richard

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    I got them on ebay a couple of weeks ago for $300.00. They have a bit of road rash on one corner, I might have to round all of the corners to match, or find a good welder. I found the spec sheet and it says they are good from 800 hz to 4000 hz. Hopefully I can find plans for a cabinet that has enough room for them and two 15 woofers. I really don't want to try to design my own cabinet.

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    Senior Member RMC's Avatar
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    Two woofers is not a 4530 but rather a 4520 cabinet...

    Richard

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    Quote Originally Posted by RMC View Post
    Hi Robert,

    2395 and 4530 are short-throw devices (up to 75 feet for 4530) whereas 2402 (40° conical dispersion) is a long-throw tweeter... You'd be better off using the 2405 type tweeter for better balance, dispersion and similar "reach". The original compression driver for 2395 horn/lens assembly was the JBL 2440. The original recommended drivers for the 4530 boxes were JBL 2205H (replaced by 2225H) and E-140 15" which may be difficult to find in original state or with original recones... So, then look-up Thiele/Small parameters on JBL's Web site for the best drivers (2205H/E-140) and try to find a new driver with as close as possible T/S to those to load your 4530 boxes, as well as with response > 800hz for x-over purpose. The 2225H was not recommended by JBL for 4530 use (see T/S) but some people did use it with success they said, and it was the only "suitable" (closest) one left at that time in the JBL catalog.

    There is no port in a 4530 but rather a rear-loaded folded horn (scoop). No need to change the dimensions of that. If you did it may not work correctly (according to specs).

    Richard
    I changed the original post to 4350, I'm dislexic at times.

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    Forgot to mention I use mine with a bms
    coax so I don't use a uhf driver. I agree with RMC a 2405 or a 2404 would be a better match.

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    So what drivers would work if I built this cabinet? The 4350 came with dual 2331 drivers, but I believe they were use only to 200 Hz. They probably are difficult to find also. I have a couple of E145, but the next two might take a while to find.

    The cabinet should be approximately 12 cubic feet with six 3" ports.

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    Quote Originally Posted by robertg View Post
    So what drivers would work if I built this cabinet? The 4350 came with dual 2331 drivers, but I believe they were use only to 200 Hz. They probably are difficult to find also. I have a couple of E145, but the next two might take a while to find.

    The cabinet should be approximately 12 cubic feet with six 3" ports.
    Hi Robert,

    Since the 4350 came with 2231H you may want to try to find that driver's successors which are 2234H and 2235H, the latter being easier to find. But there's a wrench in the wheel if you want to build a pair of boxes: you have a pair of E-145 (musical instrument driver) and the 15" 2235H is more of a studio monitor/Hi-Fi driver with different specs than E-145. That would mean different low-frequency sound from the two boxes..., even supposing both drivers would be a good match for the box you plan to build (which may not be the case) !

    Maybe you'd be better off looking for two more E-145 to minimize costs ? (vs 4 x 2235H), since logically you need four of the same thing for a pair of 4350 type boxes. Then you have to run driver data in speaker design software to see what proper box you can make with each pair. Box volume and port number/dimensions may or may not be as you had planned, specially if they are not the original 2231H...

    An even better/cheaper solution would be to build boxes for a single E-145 along with your horn/lens and tweeter devices. Simpler/cheaper all the way.

    Richard

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    I was thinking about going to a single driver, but I like the symmetrical look of two 15" drivers in such a wide cabinet. Mounting a 36" wide horn on a narrow cabinet doesn't look right to me.

    After doing a bit more of research, it looks like the 4508 cabinet will work with dual E145s and the more common 2225. I could build a cabinet based on it.

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    Senior Member RMC's Avatar
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    Quote Originally Posted by robertg View Post
    I was thinking about going to a single driver, but I like the symmetrical look of two 15" drivers in such a wide cabinet. Mounting a 36" wide horn on a narrow cabinet doesn't look right to me.

    After doing a bit more of research, it looks like the 4508 cabinet will work with dual E145s and the more common 2225. I could build a cabinet based on it.
    You are right about 4508 cabinet being suitable for both E-145 and 2225H drivers as per JBL. But you still have two issues remaining: Your lens at 36" wide are still much wider than a 4508 at 26.5" wide and the sound differences between one cab with 2 x E-145 and the other cab with 2 x 2225H...

    BTW there's a small difference (1 db) in sensitivity re each driver (times two drivers = 2 db, which is noticeable) and different response curves for the drivers... Also 4508 dimensions have varied berween 1980 and 1982 as per JBL depending where you looked at them (Compare JBL "Low frequency Enclosures" 05/80 brochure vs the JBL 1982 Pro catalog). Also have a look at JBL Pro Enclosure Guide for other alternative boxes.

    Richard

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    I would turn them sideways and mount the horn and tweeter on top, probably end up with a cabinet thats 35" x 41". I would also use four matching woofers, preferably E-145. If I could find a deal on 4-2225 woofers, that would work also.

    The top section of the cabinet would be wasted space, just housing the horn and tweeter.


    Model 4508 Bass Reflex Dual Driver
    The 4508 is a slim-profile, vented enclosure that offersoutstanding low frequency reproduction in a very compactpackage. Frequency response is uniform to 45 Hz withusable response to 35 Hz. Net weight, less drivers, is 49 kg(108% lb). 1060 mm x 667 mm x464 mm deep (41in x26
    in x l8 in deep).

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    Senior Member Lee in Montreal's Avatar
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    Hey Robert

    Perhaps of inspiration. If I were in your shoes, I'd go this way. ;-) But not with a bullet but a 2405 tweeter crossed at 8Khz
    Make the cab as deep as your horns.


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    I've seen that picture before, I think it's on Pinterest. I still like the look of the bullet, but I'll have to try a pair of 2405 tweeters one day. I think they have the same mounting pattern as a 2402, however if I use my 2482 mid drivers, I have to use something that crosses over at 4k. My horns and drivers are 17.5" deep, so most of the cabinets are 18" deep or more. I wasn't planning on having the horn in the same space as the woofers anyway so the backs will be open.


    Quote Originally Posted by Lee in Montreal View Post
    Hey Robert

    Perhaps of inspiration. If I were in your shoes, I'd go this way. ;-) But not with a bullet but a 2405 tweeter crossed at 8Khz
    Make the cab as deep as your horns.


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    Senior Member berga12's Avatar
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    If you want a good "Modern" alternative you can use 4x2226h, much lighter than 2225h, suitable also for some horn loaded cabinet, easier to find, modern technology and nice sound.

    I used 4 in place of the 2235h in the meantime I was waiting to get them, and they are able to produce until 38-40hz flat on a 4350 cabinet (with shorter port) with a big punch and clean sound.

    Ofcourse if you have enough money the market is full of alternative, for example TAD1601

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