Power handling: 40 watts rms, 80 watts peakBlue fiberglass cone woofer1 1/2" titanium swivel dome tweeterBack box enclosure for extra protection and consistent sound qualityEZ mounting tabsSensitivity: 88 dB; 8 ohms impedanceFrequency response: 50Hz-20kHzSP-525B: Overall: 8 5/16" W x 11 3/4" H x 3 11/16" D SP-525B: Cut out:SP-625BB: Overall: 8 5/8" W x 12 1/8" H x 4 1/4" D SP-625BB: Cut out:SP-825B: Overall: 10" W x 14" H x 4" D SP-825B: Cut out: