Giging on sat night, pluged in my mackie sub - Bang (not really) but the power went dead in it. tryed new leads but no joy.

Before i open it up has anyone any advice on this ?

Look at the fuse.

Probably a 3amp quick blow fuse


TAKE A LOOK AT THE FUSE AND REPLACE WITH A SIMILAR RATING.

ive got the same sub and it blew the plugs fuse at a gig few months ago when first turned on....it was the "starting" surge i think coz i put a 5 amp in and all ok

I Think these babies need a 13 amp fuse in.

All the kettle leads have 13 amp fuses, the leads are ok as when i plug them in to the 450's there ok. Does anyone know if their is an internal fuse ?

There should be an internal fuse yes!

Regarding internal fuses generally, it is always tempting to replace a blown one, but remember they are put inside for a reason! You may be lucky and it works beautifully, but as an engineer, I wouldnt just replace any internal fuse without first checking basic things like the rectifier and output transistors, etc. Even so we normally 'wind-up' fuse blowers on the variac whilst monitoring current just to be safe.

If the internal fuse blows a second time (or more if you're reckless..) you may in fact be doing additional damage everytime you feed it with fuses. To the layman, it may look like you've just blown another fuse, hey-ho, but you may be clocking up the repair price with each attempt.......

Good luck anyhow.

PS Many powered speakers shake components off their amp PCB's (Mackie tend to shed their power resistors) and this may blow internal fuses.

Thanks all for the advice.

Took the plunge and removed the back panel. Little word of advice - i opened the wrong hex nuts - these held the pcb unit onto the panel. After figureing what screws to remove i unpluged the wires and got at the fuse.

Yep it was the fuse a 250v 4A type. Replaced it no problem reassemble and happy days.

Tec