The DB series of amplifiers has been with us since our inception over a decade ago. It has undergone development over that time to present today as a reliable and great sounding way to add high performance amplification to your car without excessive cost. Firstly, it has terminals and connectors that you would associate with a more expensive unit, which along with the included instructions makes installation easy and extends service life even when swapped between vehicles. Carefully designed and custom screen printed controls make setup easier and the amplifier comes printed with a host of helpful tips even on the chassis. The 4.1 returns to do battle with a hugely improved crossover section and an even more tank like build! Sound quality is excellent and with high level inputs and the ability to run modest subwoofers or stereo loads - even simultaneously - this is the go-to amp for best value and performance in this category.