[quote name='derrenleepoole' post='839656' date='May 17 2010, 12:08 PM']A few names to check out are East, a UK outfit with lots of kudos but not cheap. Audere do a straight control plate replacement but you must import from the US. And then there's Varitone stuff, must available from eBay, quite cheap by comparison. All these will give you an active EQ, not strictly an active bass. Audere are superb preamps, as I have one. I've used East and they're amazing. No experience with Varitone, but the Youtube video demonstrations look very good.[/quote]
Cheers, somewhere to start at last. Reading the forum I notice some players copper line the cavity to reduce hum/buzz. Might try that too.