Audio System AS4120

The Audio System Italy AS4120 is a high-performance 4-channel amplifier designed for high-end car audio systems where sound quality, control, and power reserves are paramount. The amplifier was designed for high-end front and rear systems as well as for combined speaker and subwoofer configurations.

With 4 × 120 watts RMS at 4 ohms or 4 × 190 watts RMS at 2 ohms, the AS4120 delivers enough power to drive even high-impedance speaker systems with precision. In bridged mode, up to 2 × 380 watts RMS at 4 ohms are available. This makes the amplifier equally suitable for high-power 2-channel applications or for driving corresponding subwoofers.

The AS4120 places special emphasis on its analog circuitry and high-quality components. Carefully selected transistors, low-impedance signal paths, and a design engineered for high current handling are intended to enable dynamic and controlled sound reproduction. The solid aluminum housing also aids in heat dissipation.

To allow for flexible adaptation to any speaker system, the amplifier features a wide range of built-in crossovers. High-pass, low-pass, and band-pass filters enable various system configurations, while an adjustable bass boost offers additional customization options in the low-frequency range.

Technical Specifications

• Amplifier Type: 4-Channel Car Hi-Fi Amplifier
• Amplifier class: Class A/B
• Output power at 4 Ω: 4 × 120 watts RMS at 14.4 V
• Output power at 2 Ω: 4 × 190 watts RMS at 14.4 V
• Bridge power at 4 Ω: 2 × 380 watts RMS at 14.4 V
• Minimum load impedance in stereo mode: 2 Ω
• Minimum load impedance (bridged): 4 Ω
• Frequency response: 5 Hz – 25,000 Hz
• High-pass filter (HP): 15–500 Hz
• Low-pass filter (LP): 50–4,000 Hz
• Bandpass filter (BP): 15 – 4,000 Hz
• Filter slope: 12 dB/octave
• Bass Boost: 0 to +12 dB
• Bass Boost Frequency: 45 Hz
• Input sensitivity: 0.2 – 5 V RMS
• High-level input: available
• Signal-to-noise ratio: 88 dB
• Total Harmonic Distortion (THD): 0.09%
• Dimensions: 430 × 52 × 186 mm
• Weight: approx. 4.6 kg
• Housing: Aluminum
• Manufacturing: Made in Italy
  

Amenities & Special Features

• High-Performance 4-Channel Analog System
• 2-ohm stable in stereo mode
• Bridge mode is available for high-performance 2-channel configurations
• Integrated high-pass, low-pass, and band-pass filters
• Adjustable Bass Boost
• High-level inputs for flexible integration
• Carefully selected transistors and high-quality passive components
• Internal structure capable of withstanding electrical loads
• Solid aluminum housing for effective heat dissipation
• Suitable for high-end front speaker systems, multi-channel systems, and subwoofer applications
• Development and Manufacturing in Italy