Active Under-seat Sub-woofer
This flat, under-seat active subwoofer from Hertz adds many revolutionary developments to this popular bass solution. A super-efficient 8" driver with oversized magnet is driven by a powerful 220watt continuous amplifier at 0.4 ohms. This combination offers precise control and maximum output from a compact solution.

A 24dB/octave filter with adjustable filter corner from 50 - 150 Hz along with a 0 - 180° phase switch and 0 - 6dB bass boost adjustment offer vital adjustments. A subsonic filter offers protection from over-excursion of the cone.
 
Size mm (in.): 200 (8)
Power Handling - Continuous W: 220
Power Handling - Peak W: 440
Impedance Ohm: 0.4
Design: Super Flat Sealed
Voice Coil Ø: 38.6 (1.52) mm (in.)
Frequency Response Hz: 32 - 400
Magnet size D x d x h mm (in.): 110 x 45 x 17 (4.33 x 1.78 x 0.67)
Weight of one component kg (lb.): 4.3 (9.48)
Magnet: High-Density Flux Ferrite
Cone: Pressed paper
Voice Coil Type: Copper
Operating voltage VDC (Fuse): 6.5 - 18 (15A)
Start - Stop voltage VDC: 6
Idling current A (Power OFF): 260 m (1 m)
Consumption @ 14,4 VDC Max musical power A: 8.5
Remote IN Turn on VDC (Current): 4 (1 mA)
PRE input signal Turn ON VRMS: 10 mV
SPK input DC Turn ON VDC: 2
Distortion - THD @ 100 Hz %: 0.15
Bandwidth Hz: 15 - 150
S/N ratio dBA: 100
Output power (RMS) @ 14,4 VDC, 1% THD W: 220
PRE input signal VRMS (impedance): 0.2 - 5 (10kΩ)
SPK input signal VRMS (impedance): 1.2 - 30 (6Ω)
LO-PASS Filter @ 24 dB Oct adjustable Hz: 50 - 150
Subsonic Filter @ 24 dB Oct Fixed Hz: 15
Phase switch: 0 / 180°
Bass Boost @45 Hz dB: 0 - 6
Sub remote volume control dB: 0 - -15 (HRC 01 included)