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help replacing/fixing a horn driver

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  • help replacing/fixing a horn driver

    I have an old compression horn 5"x15". got it second hand , it doesnt have any branding. it does say japan on it and has some random numbers.

    the diaphragm has a hole in it. I am thinking getting a whole new driver would be better then trying to find a diaphragm that fits.

    im not really sure what I should be measuring . the magnet is 3" and the diaphragm (including the coil around it) is 2". I think this one would fit. ?
    http://www.amazon.com/Pyle-Pro-PDB782-Titanium-Driver-4-Bolt/dp/B000MCEL2Y/ref=sr_1_5?s=musical-instruments&ie=UTF8&qid=1323414107&sr=1-5

    advice anyone?

  • #2
    its all about how the driver attaches to the horn, some are threaded and some use a flange, measure the threads if it unscrews and buy the right size, 1-3/8"-18TPI is the most common

    but old horns can be pretty poor geometry you may be better off buying a whole unit or getting a real cheap driver from partsexpress,
    http://www.parts-express.com/wizards/searchResults.cfm?searchFilter=&srchExt=CAT&perPag e=99&sortBy=3&layout=GRID&page=1&srchPrice=&srchCa t=279&srchMfg=&srchPromo=&srchAttr=

    people really like the cheap Selenium drivers like the D250-X

    Comment


    • #3
      I did consider getting a whole new one. the problem is I didnt see any the same size. I would like it to fit in my box.

      mine has 4 bolts/screws holding it on. i took it off.. it looks like the hole on the horn (where the driver attaches to the big metal part) is 5/8th" what part am I supposed to measure ? because I dont see any 5/8" drivers...

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      • #4
        I could really use help with this. is it just to old or what..

        Comment


        • #5
          pictures plz!

          Comment


          • #6
            yea i dont have a camera.. ill try and borrow one.

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            • #7
              I know the pictures kind of suck, but i had to use a quick cam.






              Comment


              • #8
                ugh its the older flange mount driver... I find some Pyle pro drivers with 4 bolt flanges
                http://www.parts-express.com/pe/showdetl.cfm?Partnumber=292-2544
                BUT they for a square bolt pattern inscribed in a 60mm dia circle and my math suggests that's a 42.4mm bolt spacing or 1.67" which seems bigger than yours seems closer to a 36.5mm bolt spacing

                Others will know more but this looks like an "orphan interface" to me...

                if you have a machinist friend they could likely make an adapter but otherwise you may just want to put a new one in.

                this might fit
                http://www.parts-express.com/pe/showdetl.cfm?Partnumber=270-099
                http://www.parts-express.com/pe/showdetl.cfm?partnumber=264-270

                An L-pad is a good investment too so you can match the crazy efficient horn with the speaker

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                • #9
                  it does have an l-pad on it.. ill get a whole new horn i guess.
                  I have a matching one that works. the only reason not to just keep replacing the speakers is the box. idk anything about cabinets , they look pretty good to me though.

                  thanks

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                  • #10
                    hmm.. im looking and all i see is that goldwood one. its plastic . the one I have is metal. it would be nice to get a metal one. **************** I wish I could just fix the damn driver.

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                    • #11
                      Unless you could find the same driver so you're going to have a mismatch no matter what.
                      Plastic horns dont affect the high frequency sound, it just makes them lighter.
                      If I were you I'd replace them both so they match.

                      If you go with a pair of bolt on type, You may be able to redrill the horn flance so the screws line up.
                      I dont see that being a big deal. Even of theres some slop there because of the hole enlargement, some washers should
                      take care of that. You could even epoxy them on for that matter. Just be sure the wattage is doubble your application.
                      The old driver blew because it was over powered most likely so having a higher wattage driver is a safety factor.

                      Comment


                      • #12
                        the hole on the horn is smaller then any of the drivers I have found, idk if thats going to be a problem, im guessing sound will still go through.. I can definitely drill new holes though.

                        the woofers are GT152 JBL 150W 300W max. im guessing the woofers will go pretty quick after I replace the horn and start using them =/.

                        I have no idea how many watts the horns are . based on the the woofer im sure a 200W horn is enough. ill only be using a 200w amp anyway. I think ill get one of these

                        edit , i ended up just wiring it up to another half working speaker. if i want a good set of pa speakers ill buy some new ones.

                        Comment


                        • #13
                          Looks like an old Foster driver, this may be the original part number: B5623100

                          You will need to find a speaker repair shop or reconer who is old enough to remember these. I don't recall seeing any replacement diaphragms available in years. I don'tthink the H25 type diaphrams will fit but I haven't seen one of these in probably 15 years. The mounting is non-standard, though Foster still uses an ~5/8" throat on some products.

                          Foster used to make some killer 15" cast frame speaker products too, again, long gone.

                          Comment


                          • #14
                            Looks like an old Foster driver, this may be the original part number: B5623100

                            You will need to find a speaker repair shop or reconer who is old enough to remember these. I don't recall seeing any replacement diaphragms available in years. I don'tthink the H25 type diaphrams will fit but I haven't seen one of these in probably 15 years. The mounting is non-standard, though Foster still uses an ~5/8" throat on some products.

                            Foster used to make some killer 15" cast frame speaker products too, again, long gone.


                            by odd coincidence Partsexpress is selling a Foster tweeter!
                            http://www.parts-express.com/pe/showdetl.cfm?Partnumber=279-102&FTR=foster

                            Comment



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