Hertz DP 1,500

Hertz DP 1.500 - 1-Channel Class-D Mono Amplifier for Precise Subwoofer Operation

The Hertz DP 1.500 is a 1-channel Class-D amplifier that drives subwoofers in the vehicle with control and efficiency. It operates stably at 2 Ω, uses a balanced input circuit for clean signal handling, and offers practical adjustment options for precise bass. Details such as a status LED, a removable top cover, and a solid milled terminal block facilitate installation and operation.

Technical Highlights

• 1-channel mono amplifier (subwoofer)
• Class D with 86% efficiency
• 2 Ω stable, bandwidth (-3 dB): 10 Hz – 500 Hz
• Balanced input stage for low-interference signal transmission
• Inputs: Pre-In (RCA) and Speaker-In (High-Level)
• Pre-amplifier output: Full-Range Pre-Out
• ART: automatic turn-on/off via SPK-IN (BTL radio), switching threshold 1.5 VDC
• Status LED, removable top plate, solid milled terminal block

Settings & Filters

• Pre-In sensitivity: 0.32 – 8 VRMS
• Speaker-In sensitivity: 1.6 – 40 VRMS
• Low-pass filter: OFF / 50 – 250 Hz, 24 dB/Oct.
• Subsonic filter: OFF / 25 Hz, 24 dB/Oct.
• Phase: 0° / 180°
• Bass Boost at 50 Hz: 0 – 9 dB
• SUB Remote Volume Control HRC 02 (optional): −20 to +6 dB
• Adjustable crossovers: Yes

Output Power

• RMS at 1% THD:
  • 1 × 280 W at 4 Ω
  • 1 × 500 W at 2 Ω
• RMS at 14.4 VDC, 10% THD:
  • 1 × 350 W at 4 Ω
  • 1 × 590 W at 2 Ω
• Total power: 590 W

Power Supply & Consumption

• Nominal voltage (fuse): 11 – 15 VDC (1 × 30 A)
• Operating voltage: 6.5 – 17.5 VDC
• Idle current: 1 A
• Standby current draw: 50 µA
• Consumption at minimum load impedance (max. music power): 21 A
• Remote IN: 4 – 17 VDC (1 mA)

Audio Performance

• Distortion (THD) at 100 Hz, 70% nominal power: 0.2%
• Damping factor at 1 kHz, 1 W: 180
• Signal-to-noise ratio (A-weighted, 1 V input): 99 dBA
• Minimum load impedance (1 channel): 2 Ω

Installation & Compatibility

Thanks to Pre-In and Speaker-In, the DP 1.500 can be connected to both aftermarket radios and many factory systems. The ART function enables automatic turn-on via the high-level inputs for BTL radios. The compact housing, robust terminal block, and removable top cover support a clean, service-friendly installation. With 2 Ω capability and comprehensive filters, the amplifier is ideal for dedicated subwoofer setups.