Hertz SPL Show SP 1.900

Hertz SPL Show SP 1.900 - Mono Amplifier with 1000 W RMS and IP55

The Hertz SPL Show SP 1.900 is a 1-channel mono amplifier for subwoofer setups, delivering up to 1000 W RMS at 1 Ohm. The efficient ADC (Advanced D-Class) technology achieves up to 87% efficiency, reducing heat generation and preserving the vehicle's electrical system. With IP55 protection, flexible filters, and high/low-level inputs, the SP 1.900 can be integrated versatilely – from everyday bass systems to SPL applications. Available at Carhifi.shop.

Technical Highlights

• Mono power amplifier (1 channel) with 1-ohm capability for powerful subwoofer operation
• ADC (Advanced D-Class) output stage, up to 87% efficiency
• Filter setup for subwoofers: Low-pass 50–250 Hz (24 dB/Oct.), Subsonic 25 Hz (24 dB/Oct.)
• Bass boost at 45 Hz (0–8 dB), Phase 0–180°
• High-level and Pre-In inputs for easy OEM integration
• IP55 enclosure protection, operating temperature 0–55 °C
• Signal-to-noise ratio 95 dBA (A-weighted)
• Remote activation via Remote-In or DC-REM (SPK-DC detection)
• Optional level remote control (not included)

Output Power (RMS, 14.4 VDC, THD 1 %)

• 1 x 600 W at 4 Ω
• 1 x 1000 W at 2 Ω
• 1 x 1000 W at 1 Ω

Technical Data

• Rated supply voltage: 11–15 VDC
• Permissible pulse operating voltage: 6–16 VDC
• Quiescent current: 1.1 A
• Quiescent current in off mode: 0.03 mA
• Current consumption at 14.4 VDC, min. load (max. music power): 50 A
• Remote input: 6–15 VDC (9 mA)
• DC-REM: Remote activation via SPK-DC from BTL speaker outputs, 3.5–7 VDC
• THD at 1 kHz, 4 Ω, 70 % rated power: 0.1 %
• Damping factor >300 (1 kHz, 4 Ω, 2 VRMS)
• Frequency bandwidth (-3 dB): 5 Hz – 500 Hz
• Signal-to-noise ratio (A-weighted, at 1 V input): 95 dBA
• Pre-In sensitivity: 0.6 – 6 VRMS
• High-level (speaker) sensitivity: 2.2 – 22 VRMS
• Minimum load impedance: 1 Ω
• Adjustable crossovers: yes
• Protection class: IP55
• Operating temperature: 0 °C to 55 °C
• Weight: 2.15 kg

Inputs & Filters

• Inputs: Pre IN / Speaker IN
• Low-pass: 50–250 Hz, 24 dB/Oct.
• Subsonic: 25 Hz, 24 dB/Oct.
• Bass boost: 45 Hz, 0–8 dB (adjustable)
• Phase: 0–180° (adjustable)
• Optional remote control for volume: -21 to -5 dB (not included)

Dimensions & Design

• Ultra-compact: 211.6 x 130 x 49 mm (L x W x H)
• Dimension A: 205 mm
• Dimension B: 211.6 mm
• Dimension C: 107 mm
• Dimension D: 130 mm
• Dimension E: 49 mm

Installation & Compatibility

The SP 1.900 is suitable for subwoofer configurations in vehicles with a 12V electrical system. Thanks to the high-level input and DC-REM, it can be connected directly to factory radios without a separate remote output. With a minimum load impedance of 1 Ω, IP55 protection, and a compact housing, installation is possible even in demanding environments. The filter section allows for precise tuning to the enclosure and vehicle acoustics, including subsonic protection for vented setups.