81.9% @ 4-Ohm
77.7% @ 2-Ohm
64.5% @ 1-Ohm
POWER Amplifiers - T2500-1bdCP - Rockford Fosgate®
FMTT, there are so much better amps available than that overpriced crap. American Bass, Sundown, IA, B2, AQ, DC, Crescendo, Powerbass, Crossfire, etc. are ALL superior and so much more efficient at 1 ohm rated than that T2500.