Model Number: UD8D4
Size: 8 in.
RMS/MAX Power: 250W / 500W
Recommended Power Range: 100W to 250W
Cold Rolled Steel Basket
Cast Aluminium Magnet Heat Sink
Frequency Response: 38Hz – 500Hz
SPL at 1W / 1m: 92 dB
Mounting Depth: 5 in.
Voice Coil: 2 in. BAESIV

These subwoofers have been designed with a Great Bang for The Buck approach. Giving high performance, rigid construction and peace of mind that it will last. We have options to meet 450 – 1000 watts of Max Power handling and sizes in 8? 10? and 12? They feature a robust suspension with Santoprene Rubber roll surround and long-lasting CONEX spider. Let’s not forget the motor structure with its integrated heat sink to help dissipate heat from the magnet. All of these to lower distortion and keep everything moving in a linear motion all while keeping your vibe alive.

GENERAL	UD8D4
Size	8"
Impedance (ohm)	Dual 4 ohm
Cone material	Reinforced ultra stiff pressed paper
Surround material	Butyl rubber
Voice coil	2” BAEISV
Ideal sealed box volume (cu ft / litre)	0.47 / 13.31
Ideal ported box volume (cu ft / litre)	0.81 / 22.94
Port diameter (inch / mm)	3 / 76.2
Port length (inch / mm)	5 / 127
Dual voice coil	Yes
Sensitivity (1W / 1mm)	92 dB
Frequency response	38Hz – 500 Hz
RMS (watts)	250
Peak power handling (watts)	500
Mounting depth (inch / mm)	5 / 127
Vas (cu ft / litre)	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

UD8D4 | 8” 4 ohm Ultra Drive Car Audio Subwoofer 500 watts

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