Ground Zero GZIA 135.4 - 4-kanaals versterker

4-channel amplifier
Delivered between Fri, 17.4. and Thu, 23.4.
Only 2 pieces in stock at supplier
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Product details

The Ground Zero GZIA-135.4 is a versatile 4-channel car amplifier from the Iridium Series featuring Class A/B technology, designed for users seeking high sound quality, flexible configuration options, and enhanced bass control. This amplifier delivers an RMS output power of 4 x 85 watts at 4 ohms, 4 x 135 watts at 2 ohms, and 2 x 270 watts in bridged mode at 4 ohms, all measured according to the CEA-2006-A standard. The package includes a remote control for the subwoofer volume, allowing for convenient adjustment of low-frequency levels without accessing the amplifier itself. With high-quality Class A/B output stages, the GZIA-135.4 produces a natural, dynamic sound with a damping factor of 100 and a signal-to-noise ratio of over 80 dB. The frequency response ranges from 10 Hz to 30 kHz (±1 dB) with an adjustable low-pass filter (30-250 Hz), high-pass filter (40-3000 Hz), and bass boost (0-12 dB at 45 Hz). The input sensitivity ranges from 200 mV to 6 V, enabling the connection of both low-level and high-level inputs for easy integration with factory radios. The amplifier supports multiple operating modes, including 4-channel, 3-channel, or 2-channel bridged configurations, making it suitable for driving four speakers or in bridged mode for front speaker and subwoofer combinations. An automatic turn-on function activates the amplifier when it detects a signal from high-level inputs. Constructed with a robust aluminum chassis measuring 27.8 cm in length, 19.2 cm in width, and 4.9 cm in height, the unit features efficient passive cooling and is protected by 2 x 30 A fuses. The complete package includes the car amplifier, remote control for the subwoofer volume, mounting accessories, user manual, and warranty documents.

Key specifications

Car HiFi Amplifier Features
High-pass filtersLow pass filter adjustable
RMS output power 4 Ohm
4 x 85 W

General information

Item number
57624434
Manufacturer
Ground Zero
Category
Car hi-fi amplifiers
Release date
15.4.2025

Amplifier properties

amplifier type
4-channel amplifier
Low-pass filter
30 - 250 Hz
Signal to Noise Ratio >
80 dBA
Car HiFi Amplifier Features
High-pass filtersLow pass filter adjustable

Amplifier output power

RMS output power 4 Ohm
4 x 85 W

Voluntary climate contribution

CO₂ emissions
18.76 kg
Climate contribution
CHF 0.45

Scope of delivery

Scope of delivery
ManualMounting accessoriesRemote controlWarranty documents

Product dimensions

Depth
278 mm
Width
192 mm
Height
49 mm

30-day right of return
24 Months Warranty (Bring-in)

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Reviews & Ratings

Translation: machine translated
Very good90/100
Car&Hifi Logo
Car&HifiSingle testReleaseDecember 2021

The GZCS A-4.80 is a small, smart power amplifier that can be used universally. Together with a cable set suitable for the vehicle and the corresponding loudspeakers, it makes a great plug & play retrofit kit.

This test report belongs to a different type: GZCS A-4.80 4-channel amplifier (4-channel amplifier)