SQ 4-Channel Class A/B Amplifier - 4x125W RMS GZIA 125.4-30A

Highlights

• 4-channel Class A/B amplifier with variable bias adjustment – fine-tune the operating point
• High-performance OPA 2134 operational amplifier – audiophile reference for maximum transparency
• MUNDORF® audio capacitors – high-end components for uncompromising sound reproduction
• Filterless signal paths – signal integrity preserved from input to output
• Gold-plated connectors and massive piano-lacquer finish heatsink

Description

Designed for demanding Sound Quality enthusiasts, this 4-channel Class A/B amplifier places sound fidelity at the heart of every design decision. The OPA 2134 operational amplifier ensures minimal distortion and an exceptionally wide frequency response (5 Hz – 70 kHz), while MUNDORF® capacitors guarantee a clean power supply and preserved dynamics. The variable bias adjustment allows for fine-tuning of the operating point between Class A and Class B according to your listening preferences.

• Soft delayed remote turn-on – eliminates turn-on noise
• High-level input and auto turn-on included
• Bridged mode available: 2 x 480W for bi-amplification or subwoofer use
• Integrated HPF / LPF / BPF filters and bass boost
• Level remote control included

Technical Specifications

Why choose it?

• OPA 2134 + MUNDORF® capacitors: reference audiophile components rarely integrated into car audio
• Filterless signal paths for total signal transparency
• Variable bias adjustment: fine-tune between Class A (warmth) and Class B (efficiency)
• Soft delayed turn-on – zero switching noise
• Massive piano-lacquer heatsink: thermal performance and premium aesthetics

⚠️ IMPORTANT - INSTALLATION: It is IMPERATIVE to connect this amplifier at the impedance recommended by the manufacturer and to use the recommended wire gauge. For amplifiers over 2000W RMS, the vehicle's original battery is no longer sufficient. It is strongly advised to adapt the electrical supply (additional battery, reinforced alternator) to the amplifier's consumption to avoid any risk of damage and ensure optimal performance. WARNING: Any voltage drop below 12V can damage the product.

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