B2 Audio class A/B Ref Four 4CH 1200W SQ Amplifier 4-ohm Bridgeable

The B2 Audio REF FOUR is a robust, full-range 4-channel amplifier built with Class A/B topology for audiophiles who demand sound quality, headroom, and flexibility. With a wide frequency response of 15 Hz to 25 kHz, the REF FOUR delivers clean, controlled power across the entire audible spectrum. It features advanced crossover options, bass EQ boost, and a smart monitoring system with clip, voltage, and thermal indicators. Capable of pushing 4 x 300W RMS at 2 ohms or 2 x 1200W RMS bridged at 4 ohms, this amplifier is ready for both daily systems and competition-grade builds. Its rugged build, 0-gauge power terminals, and efficient layout make it a premium choice for high-performance installations.

Specifications:

Model: REF FOUR
Circuit Configuration: Class A/B
Frequency Response: 15 Hz – 25 kHz
Signal to Noise Ratio: >90 dB
Input Sensitivity: 6 V – 0.3 V
Crossover Circuit: 24 dB/Oct
Low Pass Crossover: 40 Hz – 400 Hz
High Pass Crossover: 40 Hz – 4 kHz
Bass EQ: 45 Hz / 0–12 dB
Level Control: Included (Clip / Volt / Temp indicators)
Power Terminal Gauge: 0 Gauge / 67 mm
Fuse Rating: 150 A
Dimensions (All in Inches): 16.42″ (Length) x 6.30″ (Width) x 2.52″ (Height)

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