GZRB 20SPL-ACT

The Ground Zero GZRB 20SPL-ACT is a compact, active bass-reflex subwoofer from the RADIOACTIVE series that combines a powerful 20-cm SPL subwoofer with a built-in Class-D amplifier module. This makes the system particularly well-suited for installations that require powerful bass without the need to install a separate subwoofer amplifier.

The GZRW 8XSPL-D1, featuring a reinforced paper cone, operates in a 21-liter bass-reflex enclosure. The flow-optimized bass-reflex port supports efficient low-frequency reproduction and reduces unwanted airflow noise. Power is provided by the integrated GZ SUB-AMP 300 Class D amplifier module, delivering up to 280 watts RMS at 2 ohms.

Thanks to its RCA and high-level inputs, the GZRB 20SPL-ACT can be connected to both aftermarket radios and many factory-installed audio systems. The high-level input also provides an automatic power-on function. A low-pass filter, bass boost, and phase correction allow you to tailor the subwoofer to your existing speaker system and vehicle.

A wired remote control is included and allows you to conveniently adjust the bass level from the driver's seat.

Technical Specifications

• Product Type: Active SPL Bass-Reflex Enclosure Subwoofer

• Series: Ground Zero RADIOACTIVE

• Subwoofer: Ground Zero GZRW 8XSPL-D1

• Subwoofer diameter: 20 cm / 8"

• Diaphragm: reinforced paper diaphragm

• Impedance: 2 ohms

• Enclosure type: Bass reflex

• Enclosure material: Wood / MDF

• Net tank volume: 21 liters / 0.74 cu. ft.

• Bass-reflex system: flow-optimized venting

• Amplifier Module: Ground Zero GZ SUB-AMP 300

• Amplifier Type: Mono Class D

• RMS power at 4 ohms: 170 watts at 1% THD+N

• RMS power at 2 ohms: 280 watts at 1% THD+N

• Maximum power at 2 ohms: 330 watts at 10% THD+N

• Frequency range: 20–200 Hz (±3 dB)

• Low-pass filter: 40–200 Hz

• Low-pass filter slope: 12 dB/octave

• Subsonic filter: fixed at 20 Hz

• Signal-to-noise ratio: >94 dB (A-weighted)

• Total Harmonic Distortion (THD+N): <0.1%

• RCA input sensitivity: 0.2–5.9 V

• High-level input sensitivity: 0.3 – 10.5 V

• High-level input: Yes

• Auto-On function via high level: yes

• Bass boost: adjustable

• Phase correction: available

• Remote output: available

• Wired bass level remote control: included

• Operating voltage: 9–16 V

• Maximum current draw: 26 A

• Recommended fuse rating: 30 A

• Dimensions (W × H × D): 440 × 240 × 280 mm

• Dimensions as specified by the manufacturer, excluding the protective bar
  
  

Features

• Compact active subwoofer system with built-in amplifier

• Heavy-duty 20-cm SPL subwoofer

• Highly Efficient Mono Class D Amplifier Module

• Flow-Optimized Bass-Reflex System

• Stereo RCA Input

• Stereo High-Level Input

• Automatic Power-On Function

• Adjustable Low-Pass Filter

• Adjustable Bass Boost Function

• Phase correction for alignment with the front-end system

• Fixed 20-Hz Subsonic Filter

• Remote Output

• Wired volume remote control included