A while back I bought some old Interdyn speakers (made in Aus) which use SEAS H-211 and 25 FE-W with a simple 2nd order crossover.
Sadly one tweeter was toast, the woofers stopped working and the boxes had moisture which made them swell and crumble, so I took the drivers out and decided to experiment with rebuilding them.
The woofers had corrosion on the frames, and the speaker terminals had fallen out of the mounts. I cleaned them up, glued them in place and all was good again. I used Glycerol to recondition the rubber surrounds.
For the tweeter that wasn’t working, I ordered some new domes/voice coils from AliExpress, replaced one and it worked ok, so I put the drivers away thinking I could use them as spares for some other speakers I had.
About a month ago I saw some old empty Philips boxes for sale, which were the right volume for the woofers and with holes roughly the right size, so I thought that I’d have a go at restoring them.
The boxes had a nice veneer but quite thin timber so I added some internal panels and bracing.
I replaced the caps in the crossover, hooked them up and was pleasantly surprised with the sound.
I ordered some ferrofluid for the tweeter that had the new dome and it was better again. So I replaced the voice coil on the old tweeter, and to say I’m impressed with the result is an understatement.
Sadly one tweeter was toast, the woofers stopped working and the boxes had moisture which made them swell and crumble, so I took the drivers out and decided to experiment with rebuilding them.
The woofers had corrosion on the frames, and the speaker terminals had fallen out of the mounts. I cleaned them up, glued them in place and all was good again. I used Glycerol to recondition the rubber surrounds.
For the tweeter that wasn’t working, I ordered some new domes/voice coils from AliExpress, replaced one and it worked ok, so I put the drivers away thinking I could use them as spares for some other speakers I had.
About a month ago I saw some old empty Philips boxes for sale, which were the right volume for the woofers and with holes roughly the right size, so I thought that I’d have a go at restoring them.
The boxes had a nice veneer but quite thin timber so I added some internal panels and bracing.
I replaced the caps in the crossover, hooked them up and was pleasantly surprised with the sound.
I ordered some ferrofluid for the tweeter that had the new dome and it was better again. So I replaced the voice coil on the old tweeter, and to say I’m impressed with the result is an understatement.
Last edited:
Most new boxes seem to be narrow and deep, whilst these ones are wide and shallow, which go well in my garage!
Grille cloth will go on once the new clips arrive.
Grille cloth will go on once the new clips arrive.
