Members jahman Posted December 11, 2011 Members Share Posted December 11, 2011 hi guys, i plan to modify four sr4722a for foh use. i can get two horns to fit, one is 60x40 and the other is 90x40. for those who have used those boxes, which horn is best. i will use two for clubs/ small gigs and four for large gigs. how many people would four cover outside? i plan to power them with a qsc plx 3402. any help will be appreciated. Link to comment Share on other sites More sharing options...
Members dboomer Posted December 11, 2011 Members Share Posted December 11, 2011 which horn is best. Depends on the coverage you need. The best would be the one that covers your audience. Are you planning to bi-amp? The passive crossover is not the same depending on which horn pattern you choose. Link to comment Share on other sites More sharing options...
Members jahman Posted December 12, 2011 Author Members Share Posted December 12, 2011 i plan to run full range, but would bi-amp if it made a big difference in the sound. Link to comment Share on other sites More sharing options...
Members agedhorse Posted December 12, 2011 Members Share Posted December 12, 2011 i plan to run full range, but would bi-amp if it made a big difference in the sound. Maybe, maybe not. It depends on the passive crossover. If you are redesigning the cabinet, expect to redesign the crossover. Link to comment Share on other sites More sharing options...
Members jahman Posted December 12, 2011 Author Members Share Posted December 12, 2011 i'm not changing the driver, just the horn. do i need to change the crossover? Link to comment Share on other sites More sharing options...
Members agedhorse Posted December 12, 2011 Members Share Posted December 12, 2011 Possibly. Try it as is but I would use the 90 degrree horn (closer to what was there) and be sure you can get the proper mounting set-up. Link to comment Share on other sites More sharing options...
Members Just Mike Posted December 12, 2011 Members Share Posted December 12, 2011 I worked for a company that used to use 3 per side for bigger shows and they had the 60 deg. horns to reduce coupling. If you're using one per side, use the 90's. Link to comment Share on other sites More sharing options...
Members jahman Posted December 13, 2011 Author Members Share Posted December 13, 2011 hi just mike, thanks for the info.do you pictures of the setup? i want to be sure you a talking about the jbl sr4722a with the baby butt cheeks, also do you know what manufacture horns were used? Link to comment Share on other sites More sharing options...
Members Just Mike Posted December 13, 2011 Members Share Posted December 13, 2011 Sorry, I was talking about the x's. Link to comment Share on other sites More sharing options...
CMS Author Craig Vecchione Posted December 13, 2011 CMS Author Share Posted December 13, 2011 hi just mike, thanks for the info.do you pictures of the setup? i want to be sure you a talking about the jbl sr4722a with the baby butt cheeks, also do you know what manufacture horns were used? Sorry to nitpick, but to be clear, the 4722a has a "buttcheeks", where the 4732 has the "baby buttcheeks". Your has the fullsized HF horn, the smaller horn was for the UHF driver. I'm curious why you're planning to modify these speakers, as they are already a FOH design. Link to comment Share on other sites More sharing options...
Members jahman Posted December 13, 2011 Author Members Share Posted December 13, 2011 i'm thinking of modification, because the are 100x100 horns and i was told those horns have a short throw and would not work well for outside shows. Link to comment Share on other sites More sharing options...
Members agedhorse Posted December 13, 2011 Members Share Posted December 13, 2011 If it were me, I would sell those boxes and but something more appropriate. Probably would end up better off $$$-wise in the big picture. Link to comment Share on other sites More sharing options...
CMS Author Craig Vecchione Posted December 14, 2011 CMS Author Share Posted December 14, 2011 I agree that selling would be much better than modification. The SR series still get decent resale for their age. Once you mod the box, it's worth very little, and it may not work as you intended. Regarding the short throw; it's only important if you're forced to cover an audience *from* a distance, in other words that the distance from speaker to the front row is great. You aren't going to cover a substantial audience size with one or two pair of these boxes regardless of the horn configuration...they're relatively small speakers for outdoors. All things considered, if you haven't actually used them and found them lacking for your actual needs, I'd do just that...give them a try. If your audiences are larger than they can handle, you should be earning enough $$$ to purchase substantially more gear anyway. Link to comment Share on other sites More sharing options...
Members dennis a Posted December 14, 2011 Members Share Posted December 14, 2011 I agree that selling would be much better than modification. The SR series still get decent resale for their age. Once you mod the box, it's worth very little, and it may not work as you intended.Regarding the short throw; it's only important if you're forced to cover an audience *from* a distance, in other words that the distance from speaker to the front row is great. You aren't going to cover a substantial audience size with one or two pair of these boxes regardless of the horn configuration...they're relatively small speakers for outdoors. All things considered, if you haven't actually used them and found them lacking for your actual needs, I'd do just that...give them a try. If your audiences are larger than they can handle, you should be earning enough $$$ to purchase substantially more gear anyway. The length of throw is only half of the picture. A 100x100 pattern sprays sound all over the floor, walls, and ceiling at the same time...less than ideal. Link to comment Share on other sites More sharing options...
CMS Author Craig Vecchione Posted December 15, 2011 CMS Author Share Posted December 15, 2011 The length of throw is only half of the picture. A 100x100 pattern sprays sound all over the floor, walls, and ceiling at the same time...less than ideal. Not outside it doesn't. Reflection is going to happen regardless of the pattern width. The only difference is where the initial reflection occurs, and I can't imagine that being important. Link to comment Share on other sites More sharing options...
Members agedhorse Posted December 15, 2011 Members Share Posted December 15, 2011 There will be some additional losses for sound dispersed outside the desired pattern but outside it won't usually cause problems. You may however run out of high end by the time there is adequate HF at a distance as the padding on a 100x100 deg will be about 6dB relative to a 90x40... meaning that it will take roughly 4x the amp power at a given distance for the HF. This is accounted for within the passive crossover design but places added stress on the driver. Link to comment Share on other sites More sharing options...
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