REL Q400E hum: what caps to use?

[XsamuraiX]

Bought a old REL Q400E, first use I noticed a tiny hum in the driver but didn't take much notice until a few weeks after use it annoyed me, so I popped the backplate off, all seemed ok but the last main electrolytic capacitor was all buldged on top.

So it'll need replacing, but I think it's best to do all 4 at the same time.

Any thoughts on replacements?

 

[yodog]

What size caps does it use and how many?

 

[XsamuraiX]

Quite big and 4 of them. They have no value on them and REL do not give out service manuals

 

[richie00boy]

Try contacting BK Electronics in southend, I think they provided the electronics for these subs. Failing that, measure the voltage on them and buy new ones with similar physical size and 10,000uF or more and with same pcb pitch.