GAS Audio MAD A1-70.4

The GAS Audio Power MAD A1-70.4 is a high-performance 4-channel amplifier designed for demanding car audio systems. Thanks to its proven Class AB technology, it delivers dynamic, detailed sound with excellent control across the entire frequency spectrum. The versatile configuration options allow for the operation of front and rear speakers as well as bridge mode for high-performance mid-bass drivers or smaller subwoofers.

The specially developed A-Star heat sink design ensures efficient heat dissipation and supports reliable continuous operation even under higher power demands. For quick and safe setup, the amplifier features an integrated CLIP indicator that assists with proper level adjustment, as well as a high-level input with an automatic turn-on (ATO) function for modern factory radios without a remote signal. Comprehensive protection circuits against overheating, short circuits, and DC voltage further enhance operational safety.

Technical Specifications

• 4-Channel Class AB Amplifier
• RMS Power @ 4 ohms: 4 × 70 watts
• RMS Power @ 2 ohms: 4 × 105 watts
• Bridge Power @ 4 Ohms: 2 × 220 watts RMS
• Frequency range: 15 Hz – 22,000 Hz
• Variable high-pass filter (HPF): 50 – 4,000 Hz
• Variable low-pass filter (LPF): 50–4,000 Hz
• Filter slope: 12 dB/octave
• Bass equalizer: 0–12 dB at 45 Hz
• Input sensitivity: 0.5–6 volts
• Signal-to-noise ratio: > 98 dB (A-weighted)
• Total Harmonic Distortion (THD): < 0.5%
• Damping factor: > 130
• High-level inputs with automatic turn-on (ATO)
• RCA line output for looping through the audio signal
• Built-in CLIP indicator for easy level adjustment
• Operating voltage: 10–16 volts
• Fuse rating: 2 × 35 A
• Rugged A-Star aluminum heat sink design
• Protective circuits against overheating, short circuits, and DC faults
• Recommended power cable cross-sectional area: 20 mm² (4 AWG)