I have a pair of JBL model CF120 speakers. Yesterday while listening to the system a ground wire came loose and the next thing I realized the right woofer was out. These speakers are protected by a couple of TC 2.5A fuses. One of these fuses screws into a threaded holder, (and it was open) and the other clips into a two prong connector. Since I didn't have a small size TC fuse I swapped the good fuse into the threaded holder and I soldered, (piggy backed) a 2.5A AGC type with pigtails onto the open TC fuse and clipped it back into the socket.

So the TC fuse indeed protected the speaker, and I'm very grateful for that.. I fixed the ground problem and until I can pick up the correct fuses this will work. However I was wondering if this TC type fuse is anything special? They are two different physical sizes but how does it compare electrically with an AGC type? In theory would AGC fuses be adequate protection for these speakers? I have boxes of them.

One interesting thing I thought I'd mention was that coming right out of each speaker output on the amplifier there is a 2 amp MDX fuse that never opened. I know that the MDX is some type of time delay. Don't even know why that was in there. I would appreciate any comments on this. Thanks, Lenny