Ground Zero | Barcode: 4037072025897

GZIA 135.4

Q: How much power does the Ground Zero GZIA 135.4 deliver per channel?

The Ground Zero GZIA 135.4 delivers 4 × 100 watts RMS into 4 ohms. At 2 ohms, the power output rises to 4 × 140 watts RMS, making it ideal for high-power speaker set-ups.

Q: Can I run the amplifier in bridge mode?

Yes, the GZIA 135.4 can be operated in bridge mode. In bridge mode, it delivers 2 × 280 watts RMS into 4 ohms, making it ideal for driving high-power speakers or subwoofers.

Q: Which speakers are compatible with the GZIA 135.4?

The amplifier is ideal for speakers and subwoofers with an impedance of 2 to 4 ohms. The 140 watts RMS per channel is more than sufficient for most mid-range and high-end car speaker systems.

Q: How big is the amplifier and where can I fit it?

As part of the Iridium range, this power amplifier is characterised by its compact dimensions. The amplifier fits under most car seats or in the boot and, thanks to its efficient cooling system, requires very little space for air circulation.

Q: Does the GZIA 135.4 get very hot during normal operation?

The power amplifier features a sophisticated cooling system with generously sized heat sinks. During normal operation with adequate ventilation, the temperature remains within a safe range, even during prolonged use at high volume levels.

Q: Are any accessories included in the scope of delivery?

The Ground Zero GZIA 135.4 comes with all the necessary connections and detailed fitting instructions. Cable kits and other installation accessories must be purchased separately to ensure the installation is tailored to your car.

Q: How long will the amplifier last if used every day?

The robust construction of the Iridium range and its high-quality components ensure a long service life. Provided it is fitted correctly and used under normal conditions in your car, you can expect many years of trouble-free operation.

169,00€

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Amplifier

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Shipping

✓ Free shipping on orders of €49 or more within Germany and on orders of €99 or more to the EU.

✓ Delivery times vary by product and can be found on the product page; typically 1–3 business days for in-stock items; international shipping times may vary, usually 6–10 business days.

✓ In most cases, shipments are handled by DHL, UPS, and GLS.

✓ Depending on the product and location, items may also be shipped via other carriers.

✓ A tracking number will be emailed once the shipment has been processed.

Standard Shipping Method

✓ 1–40 kg = DHL, UPS, and GLS

✓ 40.1–Maximum kg = Freight carrier

✓ Oversized items = freight carrier

✓ Shipments subject to customs duties = DHL, GLS, or freight forwarder

Parcel Pickup

✓ Pickups are made regularly Monday through Friday. Orders received by 3:00 p.m. for items in stock are typically processed the same day and transported directly to the package center.

5% discount for payment in advance

Get a 5% discount for paying in advance. The discount is automatically applied in the shopping cart/checkout and is valid for all products. Coupons or discount codes may be excluded from this offer or may already be combined with it.

Wiring Wizard & Port Calculator

Use our wiring assistant for easy speaker and subwoofer connections! The correct connection is important for your amplifier! Low-impedance operation can damage the amplifier! The datasheet shows you which connection each amplifier is designed for!

Our port calculator shows you the tuning characteristics of your enclosure! The net volume is always particularly important here; calculate the subwoofer’s actual resonant chamber volume beforehand to get the correct result. The net volume is calculated by subtracting all dead spaces and is crucial for enclosure design.

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Bedienungsanleitung

With 4 x 100 watts RMS at 4 ohms or 4 x 140 watts RMS at 2 ohms, the GZIA 135.4 offers ample power reserves for front and rear speakers or high-performance component systems. Alternatively, the channels can be bridged, allowing the amplifier to be used flexibly for other system configurations.

The built-in high-pass and low-pass filters allow you to fine-tune the usable frequency range to match the connected speakers. A bass boost function is also available. The high-level input with automatic power-on (Auto-On) is particularly useful when integrating the system into existing factory audio systems.

To ensure a reliable power supply, the amplifier features generously sized connectors and a robust power supply. The black anodized aluminum heat sink provides effective heat dissipation and gives the power amplifier—with its “Ground Zero” lettering—a high-quality, understated look.

Highlights

4-Channel Car Hi-Fi Power Amplifier
Analog Class A/B Amplifier Technology
4 x 100 watts RMS at 4 ohms
4 x 140 watts RMS at 2 ohms
Channels can be bridged for higher output power
Integrated variable active crossover
Adjustable High-Pass Filter (HPF)
Adjustable Low-Pass Filter (LPF)
Adjustable bass boost function
High-level input for easy OEM integration
Automatic power-on function via high-level input
Reliable Power Supply
Generously sized power and speaker connections
Black anodized heat sink
Compact height of just 49 mm
Part of the Ground Zero IRIDIUM series

Technical Specifications

Manufacturer: Ground Zero
Model: GZIA 135.4
Product Line: IRIDIUM
Item Number: 11427220
Amplifier Type: 4-Channel Class A/B Power Amplifier
Number of channels: 4
RMS power at 4 ohms: 4 x 100 watts
RMS power at 2 ohms: 4 x 140 watts
Maximum output power: 640 watts (CEA-2006A / 10% THD+N)
Bridge Mode: 2 channels can be bridged
Frequency response: 8 Hz – 28 kHz
Low-pass filter (LPF): 30–250 Hz
Low-pass slope: 12 dB/octave
High-pass filter (HPF): 40 Hz – 3 kHz
High-pass slope: 12 dB/octave
Bandpass filter (BPF): No
Bass Boost: Yes
Phase control: No
Signal-to-noise ratio (SNR): > 100 dB (A-weighted)
Total Harmonic Distortion plus Noise (THD+N): < 0.1%
Input sensitivity: 400 mV – 6 V
High-level input: Yes
Auto-On Feature: Yes
BIAS Control: No
Link mode: No
Operating voltage: 9–16 V
Fuse rating: 2 x 30 A
Recommended power cable cross-sectional area: at least 20 mm² / 4 AWG
Recommended speaker cable cross-sectional area: at least 1.5 mm² / 16 AWG
Dimensions (W x H x L): 168 x 49 x 278 mm
Heat sink: black anodized

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Frequently asked questions about the GZIA 135.4 amplifier

How much power does the Ground Zero GZIA 135.4 deliver per channel?

The Ground Zero GZIA 135.4 delivers 4 × 100 watts RMS into 4 ohms.
At 2 ohms, the power output rises to 4 × 140 watts RMS, making it ideal for high-power speaker set-ups.

Can I run the amplifier in bridge mode?