Hertz Cento CP 1.2K

Hertz Cento CP 1.2K - Mono Amplifier with 1200 W at 2 Ohm and 89% Efficiency

The Hertz Cento CP 1.2K is a 1-channel Class-D amplifier that drives subwoofers controllably and efficiently. With up to 1200 W at 2 Ohm and 650 W at 4 Ohm, it delivers stable power with high efficiency of 89%. Its wide range of inputs and filters allows for precise tuning – from clean low-bass cutoff to finely dosed bass boost. Thanks to Universal Speaker Simulator (USS), high-level inputs, and ART Auto Turn-On, the CP 1.2K seamlessly integrates into factory and aftermarket systems. The robust die-cast aluminum housing and advanced interference suppression ensure trouble-free operation.

Technical Highlights

• Amplifier Type: 1-Channel (Mono), Class D
• RMS Power at 1% THD:
  • 1 Channel @ 4 Ohm: 650 W
  • 1 Channel @ 2 Ohm: 1200 W
• Total Power: 1200 W
• Efficiency: 89%
• Operating Voltage: 9 – 18 VDC
• Nominal Power Supply Voltage (fused): 11 – 15 VDC (2 × 35 A)
• Idling Current: 0.85 A
• Standby Current Consumption: 4.5 µA
• Current Consumption at Minimum Load (max music power): 50 A
• Remote Input: 4 – 17 VDC (1 mA)
• ART – Automatic On/Off via SPK‑IN (BTL‑Radio only): 1.5 VDC
• Distortion (THD) at 100 Hz, 70% Rated Power: 0.03 %
• Damping Factor at 1 kHz, 1 W: 140
• Frequency Bandwidth (‑3 dB): 10 Hz – 500 Hz
• Signal‑to‑Noise Ratio (A‑weighted at 1 V input): 102 dBA
• Minimum Load Impedance: 2 Ohm (Mono)
• Adjustable Crossovers: Yes
• Inputs: Pre-Amplifier Input (RCA) / Speaker Input (High‑Level)
• Pre‑In Sensitivity: 0.32 – 8 VRMS
• Speaker‑In Sensitivity: 1.6 – 40 VRMS
• Pre-Amplifier Output: High-Pass 50 – 250 Hz at 12 dB/Oct.
• Sub‑Channel Low‑Pass: OFF / 50 – 250 Hz @ 24 dB/Oct.
• Subsonic High‑Pass: OFF / 25 Hz @ 24 dB/Oct.
• Bass Boost (50 Hz): 0 – 9 dB
• Sub‑Remote Volume Control: ‑20 – +6 dB (active on Sub‑Channel with LPF ON)

Installation & Compatibility

The CP 1.2K is suitable for classic aftermarket head units and OEM radios. Via high-level inputs including USS and ART, you can integrate the amplifier directly with factory radios with BTL output – without a separate remote signal. The wide operating voltage range of 9 to 18 VDC provides reserves, even in vehicles with start-stop or electrified electrical systems. The steep 24 dB/Oct. filters (Low-Pass and Subsonic) support clean separation at the subwoofer, especially with vented enclosures. The die-cast aluminum housing serves as efficient cooling and ensures long-lasting operation. Available at Carhifi.shop.