I have a Rockford Fosgate power 1500bd from 2001 or 2002. No original birth sheet, but I was told by the original owner it was benched at 1823 rms at 2 ohm. Rated for 750 rms@4 and 1500@2. Also 1 ohm stable, from my testing with the twins. The end caps are missing, but I am want to get $300 plus shipping for it. Let me know if your interested.