Cadence UD8D4 8" Subwoofer Specifications RMS Power Handling: 250 Watts PEAK Power Handling: 500 Watts Frequency Response: 38Hz - 500Hz SPL @ 1w/1m: 92dB System Impedance: Dual 4-Ohm Mounting Depth: 5" (12,7 cm) Features

Cone material	Reinforced ultra stiff pressed paper
Surround material	Butyl rubber
Voice coil	2” BAEISV
Ideal sealed box volume (cu ft / liter)	0.47 / 13.31
Ideal ported box volume (cu ft / liter)	0.81 / 22.94
Port diameter (inch / mm)	3 / 76.2
Port length (inch / mm)	5 / 127
Dual voice coil	Yes
Vas (cu ft / liter)	6.2 ohm: 0.2891 / 8.19
Resonant frequency (Hz)	6.2 ohm: 51.316
QTS (Hz)	6.2 ohm: 0.839
Xmax (inch / mm)	6.2 ohm: 0.276/ 7.00