Subwoofer troubleshooting

My dad has 2 15" Q power subs. They are 8 Ohms ecah and are bridged to 4 Ohms into a 1600watt Boss amp. The other day while at almost full volume the subs started to crackle and fade. He adusted the balence and fade to center. Then thay just faded to nothing. The whole system works. We checked all the amps and theyer all fine. we checked all the conections, inside the enclosures, and out. He has a stock head-unit also. Everbody localy says thyere blown...but they never made any exsessive noise, just faded away. Any help on figureing this out would be greatly appreciated, thanks in advance.

get a mulimeter and put it on the resistance dial. check to see if you read an 8 ohm resistance on each sub. if so they could should be ok. if that checks out ok i would check the rca inputs to the amp. you could have fried the inputs going to it. you could have friend the line out converter ( the little box that takes a speaker level input and steps it down to a line level input) never run any head unit at full volume, you will get distortion and that will cause any system to fry. get a high voltage output head unit, this will lead to a cleaner sound going into and out from your amp. but most likely the subs are blown. good luck

did u check the amps channels, u could have fried those, just because the amp turns on doesnt mean that somethin else internally isnt fried, otherwise i'd say check all your grounds, more than likely something blew whether its somethin inside the amp or the woofers. if you dont think anything is blown then maybe the amp just overheated and needs to cool down for a day. thats what a friend of mine did a couple years back when he had a simular problem.

It is possible that amp cant take that load for an extended period of time.Even though it is only a 4 ohm bridged load that amp is inexpensive and may not take it.My suggestion is to hook up a different sub and see if the amp works.You may have blown the output transistors.If another sub works then you know it's not the amp,although you probably did that already I hope.That is a lot of power for even 2 15's.You could have melted the voice coil or caused it to come off of it's former or something

Well thanks for all the helpful input, but we measured the power going into the subs and there 1ohm each....blown. So, does anyone know of any cheap 15's that are worth there money... and i do mean cheap. Thanks.