JBL 4825a baby bums
Printed From: Speakerplans.com
Category: General
Forum Name: Show Off Your Sound System
Forum Description: Show of your gear. Post pictures of your Sound System here...
URL: https://forum.speakerplans.com/forum_posts.asp?TID=74990
Printed Date: 27 March 2026 at 3:28am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: JBL 4825a baby bums
Posted By: discodave
Subject: JBL 4825a baby bums
Date Posted: 07 January 2013 at 12:41pm
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finialy got hold of a 4 of theses jbl concert series 4825a i think that's right any way some think there ugly with there baby bum 2344a radial horns but i like them i love all the vintage jbl stuff. so when i come across these i just at to have them! they have got all 4 original hf drivers which are the jbl 2426j the lf not so original 1x 2206h with genuine jbl cone 1x jbl 2206hp with aluminum dust cap so a recone along the way 1x jbl i think its rather a 2202 or a k120 im not to sure im gonna up load some photos so im sure some one will know they have got the muitli pin cannon plugs on at the moment so im in the process of changing them to speakon 4pin 2x had crossovers in im not sure if there original or not i think not im going to give them a good clean down and upload some photos
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Replies:
Posted By: discodave
Date Posted: 07 January 2013 at 12:44pm
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Posted By: discodave
Date Posted: 07 January 2013 at 12:49pm
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< ="RDVideo" ="application/x-rn-downloaderpepperflashvideoshim-plugin" ="" width="300" height="0" -offsetleft="6" -offsettop="15"   its the one above im unsure about this one seems original? below   and this one has had a recone   cant wait to get them up and running im going to try and get 3 2206 so all the low end is the same would any one happen to know any cross over settings to theses? < ="RDVideo" ="application/x-rn-downloaderpepperflashvideoshim-plugin" ="" width="300" height="0" -offsetleft="2" -offsettop="5586"> < id="_npwlo" ="applicationpwlo" height="0">
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Posted By: jbl_man
Date Posted: 07 January 2013 at 1:12pm
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Nice find,from top to bottom,top one is an older 2204.middle one is later 2206,but not sure what is going on with that last driver,it appears a 2206 chassis with an E120 cone plonked in it? Either way that one is wrong. If i remember,i think the crossover is 1200hz. ------------- Be seeing you. |
Posted By: King George
Date Posted: 07 January 2013 at 1:32pm
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Yeah, crossover point is 1200hz. I have some similar boxes, Sound Power I725ap (have foam grilles to hide that ugly horn!) I have mine Loaded with the 2206 and BMS 4550, running bi-amped. Sound civilised yet can be very loud when they need to be! You won't be disappointed when you get them running!
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Posted By: discodave
Date Posted: 07 January 2013 at 7:33pm
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there seems to be a lot of variations of this box some with the 2022 driver in is there a lot of difference how the BMS compare to the jbls?   iv now added the speakons which is a job in its self removing the old glue    and after a good old scrub  im going to remove the horn driver and give the flare a good clean and to mack sure there's no harmful stuff in there then play with cross over points < ="RDVideo" ="application/x-rn-downloaderpepperflashvideoshim-plugin" ="" width="300" height="0" -offsetleft="2" -offsettop="674"> < id="_npwlo" ="applicationpwlo" height="0">< ="RDVideo" ="application/x-rn-downloaderpepperflashvideoshim-plugin" ="" width="300" height="0" -offsetleft="2" -offsettop="5986"> < id="_npwlo" ="applicationpwlo" height="0">
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Posted By: colint
Date Posted: 07 January 2013 at 8:01pm
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I loved the early sound power stuff, I had some of the 4726ap's ugly box but sounded real nice especially when mounted on top of the square 2 x 15 jbl cabs I bought with them mine were loaded with the later 2206 drivers and 2226 in the bass cabs. (AP behind the model number normally means passive crossover) http://www.jblproservice.com/pdf/Sound%20Power%204700%20Series/4726A.pdf These were the bass cabs I used with them an awesome combination http://www.jblproservice.com/pdf/Sound%20Power%204700%20Series/4745A.pdf ------------- Never criticise another man until you've walked a mile in his shoes. Once you have, call him what you like, you're a mile away and you've got his shoes! |
Posted By: King George
Date Posted: 07 January 2013 at 8:23pm
Nice work, what will be driving these and what will you be using them for?
I cant comment on how the BMS compares to the 2426.... When I bought mine, someone had replaced the originals with maplin peizo's, woodscrewed onto the back of the horn
 . I dont want to begin to think what that sounded like, especially crossed over at 1200hz...I couldn't get hold of any 2426's at the time, the 4550 fitted my needs and Tony was a helpful chap. Seemed like a logical progression. As far as compression drivers go, the 4550 seems quite efficient and sounds smooth, even approaching full chat, has a nice sparkle after a little eq. I'd say it's a good unit! |
discodave wrote:Posted By: discodave
Date Posted: 09 January 2013 at 10:59am
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I loved the early sound power stuff, I had some of the 4726ap's ugly box but sounded real nice especially when mounted on top of the square 2 x 15 jbl cabs I bought with them mine were loaded with the later 2206 drivers and 2226 in the bass cabs. (AP behind the model number normally means passive crossover) http://www.jblproservice.com/pdf/Sound%20Power%204700%20Series/4726A.pdf These were the bass cabs I used with them an awesome combination http://www.jblproservice.com/pdf/Sound%20Power%204700%20Series/4745A.pdf I loved all the old sound power stuff to the 4726ap looks very similar to slightly different horn Iv got 4x jbl 2x15's to mine are loaded with the 2032h tho not so good I think there do the job 2x of mine have crossovers in but I don't think there Original I would of rather run them passive really Next job is to save and get 3 more 2026 |
Posted By: discodave
Date Posted: 09 January 2013 at 11:07am
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Thank you guys iv been changing them ugly cannon plugs over what ever are they there seems to be a lot of variations of this box some with the 2022 driver in is there a lot of difference how the BMS compare to the jbls?[/QUOTE] Nice work, what will be driving these and what will you be using them for? I cant comment on how the BMS compares to the 2426.... When I bought mine, someone had replaced the originals with maplin peizo's, woodscrewed onto the back of the horn . I dont want to begin to think what that sounded like, especially crossed over at 1200hz...I couldn't get hold of any 2426's at the time, the 4550 fitted my needs and Tony was a helpful chap. Seemed like a logical progression. As far as compression drivers go, the 4550 seems quite efficient and sounds smooth, even approaching full chat, has a nice sparkle after a little eq. I'd say it's a good unit! All I hear is good things about the BMS stuff so I bet they sound good I'm be running them of a m2t1000 for now and probley a phonic 2500 for the top end We own a funfair so just going to put them on my ride These have had there bass drivers all changed along there life I understand why some one would mismatch them tho beats me |
Posted By: King George
Date Posted: 09 January 2013 at 3:40pm
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I'm guessing the bass cabs you have will be the MS125? This setup will be great on a ride... will make a nice change to those boxes with 'disco' sprayed on the grille I seem to remember seeing at fairgrounds!
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Posted By: discodave
Date Posted: 06 February 2013 at 8:59pm
| Yes that's the ones |
Posted By: djpetewilkes
Date Posted: 19 January 2014 at 9:35pm
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Sorry to hijack the thread, but I've just got a pair of 4726APs, containing a 2206H and 2426J. Any suggestions on crossover points/EQ/delay when using them with an active crossover, or alternatively refurbing the existing passive crossover? Thanks in advance |
Posted By: King George
Date Posted: 03 February 2014 at 1:31am
| Crossover point is 1200hz, keep them active, they will sound much nicer. As far as I recall they are physically time aligned so there is no need for delay. |
Posted By: djpetewilkes
Date Posted: 03 February 2014 at 10:33am
| Thanks King George, I'll give that a go. |
Posted By: shaun1264
Date Posted: 03 February 2014 at 2:12pm
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I have a pair of the 4825a. (2204 12" and 2425 compression driver) I crossover mine at 1200hz too. They don't have much extended top end, but with a little EQ they can get there. I high pass mine at 80hz. They can get very loud for their size .
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