This is pricey, but worth every dollar. I chose this DSP because it's made in the USA, and because it's AudioControl. They are the best at what they do and this product is no exception.
I looked at other DSPs, cheaper ones, and they all lacked one thing or another. The DM-810 had everything I was looking for. The software is extremely easy to install and use. The various connections will help keep this product relevant for many years to come. Installation of the DSP was a breeze and the results are mind blowing.
My factory system does not currently have any harnesses or dash kits to allow me change out my factory HU, nor bypass my factory amp. This seems to be the direction many car manufacturers are heading to. It is getting more difficult to upgrade car audio systems. This DSP will allow me to upgrade ANY vehicle I will ever own.
If you are serious about your car audio, this is a must have product. It is future-proof, has a 30 band EQ, allows for time alignment, can actively crossover all speakers, and sends the cleanest signal to your amps. Just make sure you also get the ACR-3 so you can have a bass knob and change your presets.