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Old 28th October 2014, 04:27 AM   #1
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Default Definitive prosub 60 issues

So I have a definitive tech sub that keeps blowing fuses. As soon as I put in a new fuse and plug it in I get a one half second burp from the woofer and then nothing. I received it this way for free, good price right. So I took it apart to start checking things. First thing I noticed, if there is no load on the amp (woofer is disconnected) then the amp will stay on all day no problem. Once I hook up the amp outputs the the woofer leads the amp goes to sleep. I measured the woofer impedance and it fluctuates a bit but sits right around 60 ohms!!! I know that some of the def tech subs that were built into the towers had high impedances but not sure if they were this high. Would this cause the amp to blow a fuse? Thoughts?

Couldn't find published TS parameters of the driver so not sure what proper imp should be. It's a prosub 60 by the way. 8" woofer with a 150 watt rms woofer.

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Old 28th October 2014, 05:47 AM   #2
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edit: FWIW, when I searched 'Definitive prosub 60 blows fuse' I found numerous postings about bad amps that were either DOA brand new or would blow fuses frequently until the amp died. Some folks tried slow blow fuses, but it didn't solve the problem long term.
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Last edited by GM; 28th October 2014 at 06:06 AM.
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