I have a Rockford Fosgate T40001bd Amplifier for sale. This amplifier can produce up to 4900 watts at 14.4 volts. It has been modified for use up to 18volts. The wattage you can only imagine what it can produce. These are in good cosmetic shape, and have a 1 year warranty left on them. I am asking for $1200.00 or best offer. Thanks