Hertz CP 1.2K – 1200W Mono Class D Amplifier

High-Efficiency Bass, Compact Chassis

The Hertz Cento Power CP 1.2K is a mono amplifier built to deliver serious subwoofer power with 89% efficiency in a compact, aluminum die-cast body. With 1200W RMS @ 2Ω on tap, advanced noise rejection, and installer‑friendly controls, it’s a rock‑solid upgrade for clean, controlled low end—whether your build is OEM‑plus, custom, or EV‑ready.

Optimized Control for Precise Low End

Tune your bass exactly how you like it using the 24 dB/oct low‑pass filter (50–250 Hz), subsonic filter (25 Hz), and 0–9 dB bass boost @ 50 Hz. Balanced Pre‑In/Speaker‑In inputs keep noise out, while Ready‑to‑Plug Molex connections and top‑panel access make installs clean and quick.

Built to Integrate Anywhere

A wide 9–18 VDC operating range and Universal Speaker Simulator make the CP 1.2K easy to integrate with factory head units and modern vehicles (including EVs). Add the optional HRC 02 remote for on‑the‑fly sub level control from the driver’s seat.

Key Features

• 1200W RMS @ 2Ω / 650W RMS @ 4Ω mono Class‑D power

• 89% efficiency Advanced D‑Class (ADC) topology

• Low‑pass 50–250 Hz (24 dB/oct) and subsonic 25 Hz (24 dB/oct)

• Bass Boost 0–9 dB @ 50 Hz for added punch when desired

• Balanced Pre‑In/Speaker‑In with high noise rejection

• Ready‑to‑Plug Molex connections; top‑panel controls

• Universal Speaker Simulator for seamless OEM integration

• EV‑friendly 9–18 VDC operating range

• HRC 02 remote compatible (sold separately)

Comparison Chart

Professional Opinion

If you want maximum subwoofer output without taxing your electrical system, the CP 1.2K is a standout. It’s compact, efficient, and exceptionally quiet thanks to balanced inputs. The filter section gives you precise control, and integration is painless—ideal for audiophile daily drivers, OEM‑plus builds, and SPL‑leaning setups alike.

F.A.Q.

Q: Is the CP 1.2K 1‑ohm stable?
A: No. Minimum load is 2Ω.

Q: Can I use it with a factory radio?
A: Yes. Speaker‑level inputs and the Universal Speaker Simulator support OEM integration.

Q: Does it include a bass knob?
A: The remote (HRC 02) is optional and sold separately.

Q: Is this suitable for electric vehicles?
A: Yes. It operates from 9–18 VDC, making it EV‑friendly.

Technical Details

• Model / SKU: CP 1.2K / CP12K

• Channels / Class: 1 / Class D (ADC)

• RMS Power (1% THD): 650W x1 @ 4Ω; 1200W x1 @ 2Ω

• Efficiency: 89%

• Frequency Response: 10 Hz – 500 Hz

• THD (100 Hz @ 70% power): 0.03%

• Damping Factor (1 kHz, 1W): 140

• S/N Ratio (A‑weighted @ 1V): 102 dBA

• Minimum Load: 2Ω

• Low‑Pass Filter: OFF / 50–250 Hz @ 24 dB/oct

• Subsonic HPF: OFF / 25 Hz @ 24 dB/oct

• Bass Boost: 0–9 dB @ 50 Hz

• Pre‑Out: Hi‑Pass 50–250 Hz @ 12 dB/oct

• Pre‑In Sensitivity: 0.32–8 Vrms

• Speaker‑In Sensitivity: 1.6–40 Vrms

• Power Supply: 11–15 VDC (fuses: 2 × 35A)

• Operating Voltage: 9–18 VDC

• Idling Current / Standby: 0.85 A / 4.5 μA

• Consumption (min load, max musical): 50 A

• Remote In / ART: 4–17 VDC (1 mA) / 1.5 VDC

• UPC: 8018823142397

• Weight: 5.37 lbs (2.44 kg)

• Sold As: Single amplifier

Power your sub stage with authority using the Hertz CP 1.2K – 1200W Mono Class D Amplifier, combining high efficiency, clean output, and installer‑friendly control.