You should be very pleased with these amps. I have been and have been using them off and on for 2 years. NOt underrated.Hey just bought a BXi 606 my 8"w7 and was looking in to a BXi2006 or BXi2607 for a 13"w7. How are they on the power ratings? At 3 ohm a 2006 would be great if not underrated.