I bought it as a birthday gift for driving a single NVX VSW122 sub to complement a factory system, and it works well - birthday girl is happy, no complaints. This amp has a lot of features that others do not for the size and price. I bought it for two reasons: 1 ohm stable with a small fuse rating (low current draw), and DC sensing on the RCA inputs (no need for a remote wire) . I used a Rockford Fosgate high level adapter to tap into the rear speaker lines, install was easy and no line output converter needed. I looked at a lot of options before going with this MB Quart, and I am pleased with the ease of install and power output.