Realistic power of the 7kd for music is about 5k at 1ohm if you give it the battery power needed. The 7k will do over 7k at 16volts. On 12 volts it's pretty much a 5k amp at 1ohm. At .25ohms on for spl competitions on 12 volts it will do about 6k. More battery you give this amp the more it puts out. I have yet to max it out on a 12 volt system yet.