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Thread: Picked up a pair of 4560A cabinets loaded......

  1. #1
    Senior Member wpod's Avatar
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    Picked up a pair of 4560A cabinets loaded......

    with the correct (2225H ) woofers and 2425H compression drivers mated to a 2470A horns (3110A crossovers). Apparently they spent their entire life inside a performing arts theatre in NYC, so the cabinets are in super nice condition. I haven't even listened to them yet , but I know that I'm going to want to experiment with different woofers for starters. Can the 2235 be horn loaded with good results in these cabs? I was also thinking of removing the horn and driver from inside of the cabinet and mounting it on the top for starters. I then have a pair of 2441s and 2350 horns that I'd like to try on top although I think that the 2350 horns are a bit too wide and will overhang the cabinet a couple of inches, so I probably won't like the look. I guess the next size down would be the 2345 horn, but I think that will only bolt up to the 2425 driver and not the 2441. Does anyone have a pair of 2345 horns that they would be willing to part with ? Also thought of trying a "Smith" horn on top, but once again, I don't currently own a pair. Suggestions anyone? thanks, Paul
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    Senior Member 1audiohack's Avatar
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    Welcome to the 4560 club haha.

    I have a pair of older ones that also came out of a permanent install. Mine have 2205's, 2420's on 2345's and 2405's.

    Like you I doubt I will be happy with a one inch driver and doubt the 2345 is going to cut it but I haven't even run them yet but that is going to be my first step, some day, soon?

    I'll be interested in how you go.

    All the best,
    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

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    Senior Member Lee in Montreal's Avatar
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    Hi wpod

    The 4560 was often used with a woofer sporting an aluminum dome. Probably that is what allowed the woofer to reach high enough for the 1" driver and 2345 horn. I have, among other horns, a set of 2350 and definitely love their personality. I love listening to jazz trumpet with those. They have a tendency to be beamy, or rather sound different depending on your distance with the horns. But it is part of the charm.

    As for using a 2235, well, check what volume the cabinets are. Maybe it will work if you only keep one vent to help tune lower. Initially, that cabinet was not designed to go low. Maybe 50 Hz at most. With the horn to put the emphasisis on 100Hz and over


  4. #4
    Senior Member wpod's Avatar
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    Thanks for that info about the tuning.....

    I got them fired up yesterday, and that was one of the first things that I noticed, that the lower bass was lacking a bit. I then removed the horn and driver from the cabinet and covered that opening with a piece of plywood. I then mounted the 2350 horn coupled to a 2440 driver on top and immediately noticed the improved bass response. I didn't have any test equipment with me ,so I can't report any real numbers at this time, but it definately sounded better to my ears. These cabinets have a second set of binding posts in the rear near the top, so I connected the high frequency leads from the 3110A crossover (previously connected to the 2425H ) to the back (inside) of the these binding posts. It was then , just a simple matter of running a short run of wire from these binding posts up to the 2440 on top, very easy! The allure of these cabinets to me is their effeciency. I have a few low powered (2 watts) single ended tube amps that I'm dying to try with these. I'll probably end up using the #45 tube amp on the compression driver and a more powerful tube amp on the woofer through an electronic crossover. Having a lot of fun so far! Thanks, Paul
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    try a pair of 2226h they have a deeper bass than the 2225h, maybe an E145
    Angel

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    Senior Member wpod's Avatar
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    I have a pair (actually two ) of the 2226J woofers (tent sale)

    and I didn't know that they would play lower than the 2225H. Question, is it possible to "pad down" the 2226J (16 ohm) to give it the same DCR as the 8 ohm 2225 H so that I can continue to use the 3110A crossover? I also have a pair of Altec 515E woofers which I know will love being horn loaded due to their use in the VOTT. Just don't know how low they will go. Do you happen to know if the 2235 was ever used in a front horn? thanks, Paul
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    Ok I have used 2225H 400 watts back in the 80's in a 4530 with big power amps and when the 2226h 600 watts came out they had much deeper bass in the same speakers and used Crown Macro Tech 2400. The 3110A is 8 ohms for the bass and 16 ohms for the highs, so stick to 8 OHms for the bass. No for the 2235H, they are meant for reflex speakers with duct and work great there. I used the 4560 with the 2225H and gave decent bass, however I used electronic crossovers and powerful amps and EQ. I also seen the 4560 used for mid bass, and big 4520 or ASH6118 for subs, lots of power. But if you are using a 3110A is meant low power, go for the E145 and Mac and you will be happy.
    I hope this helps
    Angel

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    Senior Member wpod's Avatar
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    Just remembered that I also have a pair of LE-15A......

    How would these do in the front loaded horn cabinet? Does anyone know what the volume is for this 4560A cabinet? It measures 36x 30x23 7/8 externally, but then you have to subtract the volume of the front horn. I'd really like to know this so that I can figure out the correct porting for each woofer that I plan on trying. Thanks again, Paul
    JBL 4343, JBL L300 Summit, UREI 811, JBL 4311, JBL 4301, JBL L5, JBL L50, JBL L100 , to name a few

  9. #9
    Senior Member Kalle's Avatar
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    How about trying some Coaxialspeaker? Like Ehmmm.... Beyma? 15 XM? I know that Beyma 15xa38 is used in expensive HIFI-hornloaded speakers that people says sounds very nice.

    Personally i have 2 Beyma 15xm I don`t know what to do with. http://www.diyparadiso.com/datasheet...beyma/15xm.pdf

    Regards
    Karl

  10. #10
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    4560

    As I recall and I may not be correct...... from memory of long ago projects about 6 ft ^3 or if you prefer 160L

    Cyclotronguy

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