Audison SAR 4,500

Audison SR 4.500 - 4-Channel Class D Car Hi-Fi Amplifier with 880 W RMS and Flexible Filters

The Audison SR 4.500 is a compact 4-channel amplifier that combines power, control, and easy in-car integration. You get a true 4×125 W according to CEA standard, up to 220 W per channel at 2 Ω, as well as practical bridge modes for 2-, 3- or 4-channel setups. The fanless cooling concept ensures quiet operation, while high and low-level inputs, ART Auto-Remote, and an integrated Pre-Out make connection to OEM and aftermarket radios uncomplicated. Available at Carhifi.shop.

Technical Highlights

• Class D topology with 880 W total RMS power
• CEA Power: 4×125 W at 4 Ω (1% THD+N, 14.4 V)
• 2 Ω stable in 4-channel operation, 4 Ω stable bridged
• Versatile filter section: High-/Low-Pass per channel pair, full-range Pre-Out
• OEM-ready: Symmetrical high-level inputs, integrated USS and ART Auto-Remote
• Compact, fanless housing with efficient heatsinks

Technical Data

• Amplifier Class: D
• Hi-Level Input: Yes
• Low-Level Input (RCA): Yes
• Digital Input: No
• Supply Voltage / Fuse: 11–15 V DC / 2 × 25 A
• Operating Voltage Range: 6.5–17 V DC
• Idling Current: 1.7 A
• Idling Current when off: 0.09 mA
• Max. Current Consumption (Music) @ 14.4 V DC, 2 Ω: 40 A
• Remote OUT: 6.5–15 V DC (150 mA)
• Remote IN: 6.5–15 V DC (1 mA)
• ART (Automatic Remote Turn-on) on BTL speaker output, switching threshold: 1.5–7 V DC (selectable)

Amplifier Section

• THD @ 100 Hz, 4 Ω, 70% Rated Power: 0.08 %
• Frequency Response: 10 Hz–35 kHz
• Signal-to-Noise Ratio (A-weighted): 105 dBA
• Damping Factor: 200
• Input Sensitivity Pre-In: 0.2–5 V RMS
• Input Sensitivity Speaker-In: 0.8–20 V RMS
• Total Power RMS: 880 W
• Minimum Impedance per operating mode:
  • 4-channel: 2 Ω
  • 3-channel: 2 Ω + 2 Ω + 4 Ω
  • 2-channel (bridged): 4 Ω
• Output Power (RMS) @ 14.4 V DC, 1% THD:
  • 4×130 W at 4 Ω
  • 4×220 W at 2 Ω
  • 3-channel: 2×120 W at 4 Ω + 1×480 W at 4 Ω
  • 3-channel: 2×220 W at 2 Ω + 1×440 W at 4 Ω
  • 2-channel (bridged): 2×450 W at 4 Ω
• Adjustable Crossover: Yes

CEA Specifications

• Output Power @ 4 Ω, 1% THD+N, 14.4 V: 125 W × 4
• Signal-to-Noise Ratio (referenced to 1 W output): 83 dBA

Inputs & Filters

• Input Types: Pre-In (RCA) / Speaker-In (High-Level)
• Pre-Out: Full-range (Source: Input A)
• Front Channel A: High-Pass 50–3.2 kHz, 12 dB/Oct
• Front Channel B: Low-Pass 50–3.2 kHz, 12 dB/Oct
• Rear Channel C: High-Pass 50–3.2 kHz, 12 dB/Oct
• Rear Channel D: Low-Pass 50–3.2 kHz, 12 dB/Oct
• A/B Channels: MONO IN (Bridge mode) switchable
• Sub-channel Level: -20 to +6 dB
• Bass Boost Channel B: 0–12 dB

Features & Equipment

• Space-saving design with rounded edges for easy installation
• Integrated USS (Universal Speaker Simulator) for problem-free OEM connection
• Fully integrated crossover for flexible system configurations
• Optional VCR-S1 remote control for subwoofer level control (-20 to +6 dB)
• Symmetrical high-level inputs for OEM radios
• Low-level RCA inputs for aftermarket head units
• ART (Automatic Remote On/Off) for automatic power on/off
• Remote IN/OUT for controlling multiple amplifiers
• PRE-OUT for system expansion

Dimensions & Weight

• Weight: 2.12 kg
• Dimension A: 264 mm
• Dimension B: 234 mm
• Dimension C: 155 mm
• Dimension D: 135 mm
• Dimension E: 47.5 mm

Installation & Compatibility

• Suitable for 2-/3-/4-channel setups and bridged configurations
• 2 Ω capable in multi-channel mode, 4 Ω capable in bridged mode
• OEM integration via High-Level including ART and USS, as well as RCA connection to aftermarket radios
• Compact design and passive cooling concept for flexible placement in the vehicle