Blown 20watt 4.7uf on soft start board

[ben62670]

I blew the 3 of the 4 speaker out fuses with my Polk SDA speakers when hooking it up blindly. I realized my mistake, but wanted to finish my listening session. So I stuck 2 15a, and a 20a fuse in. Fix the speaker wiring. Turned it on, and poof. I looked for damage, and found none. So I busted out my mm found power on the soft start board. Unplugged it. Started testing resistors. The big 20watt 4.7uf was open. Took a hammer to it. Found the burnt spot. I am scared to just replace the resistor( I have 2 10ohm 10watt resistors). I don't want to blow anything else. What caused the resistor to blow after installing the speaker fuses?
Should I raplace the rail fuses, and give it a go with 5ampers instead of 10ampers?
Thanks Ben

 

[Greg Erskine]

Hi Ben,

Sorry to hear about your problems, but I think you need to take it to a professional before you do more damage to it, or yourself.

regards

 

[djk]

Polk SDA speakers will blow up mono-bloc and bridge output amplifiers.

This includes dual-mono amps like the Adcom GFA555.

 

[SY]

This includes dual-mono amps like the Adcom GFA555.

For bridged I can see trouble in a common-ground wiring, but why dual mono? I've had a 555 for years and hooked it to all sorts of wiring schemes (including common-ground) with no problem whatever.

 

[ben62670]

Killed this thread, and started another. Due to lack of sleep I rated a 4.7 ohm resitor a 4.7uf. I gotta watch stuff like that