Dayton Audio DSP-408 4x8 DSP Digital Signal Processor for Home and Car Audio

Firstly, no ground loop issues as other reviews have mentioned, if humming, engine whine or buzzing is an issue then the installation really needs to be investigated, most likely caused by poor or inadequate ground connections. Used this to replace a faulty Bit10. Have to say I prefer it, easy to install and the software is quite good, if you know what you're doing then it's quite quick to get it all up and running. Only downside is the availability of the remote control which is an optional item....would like to see it included as can't find one anywhere.

Do your research before buying this, I've spent a month proving that this DSP is the cause of awful whine and noise in my system, an expert electrician explained to me it's the internal grounding technique causing the problem.If like me, you're only competent ay car audio installs and not a dead cert expert, save some more money and buy the next brand up.Shame as it sounded awesome when the engine was off.Amazon were great handling the return and refund !