Hertz SP1.900 1000W RMS Mono Amplifier

Hertz SP1.900: Compact Powerhouse Mono Amp for Aussie Rides

Big bass in tight spaces – no compromise, no clutter. The Hertz SP1.900 1000W RMS Mono Amplifier delivers serious subwoofer punch in an ultra-compact chassis that’s perfect for motorcycle installs, under-seat car setups, or tight truck cabs. Whether you're carving corners on your Harley or cruising cross-country, this amp's got the muscle to keep your sound system hitting hard.

Engineered with Hertz ADC (Advanced D-Class) tech, the SP1.900 achieves up to 87% efficiency with ultra-low distortion – translating to clean, powerful bass even under harsh riding conditions. It also nearly eliminates EMI and RFI noise, ensuring your signal stays crystal-clear even in electronically noisy environments. The IP55-rated sealed aluminium chassis shrugs off water, dust, and vibration, making it a rock-solid choice for motorcycles and marine applications.

Cranking 1000W RMS stable down to 1Ω, this amp packs serious punch without stressing your electrical system. Add the optional HRC BM controller and dial in your sub level from the saddle or dash. With built-in USS (Universal Speaker Simulators), it integrates cleanly with head units featuring speaker-load detection, and ART (Automatic Remote Turn-On/Off) makes installation seamless – no extra remote wire required.

Ready for whatever the road throws at you. The SP1.900 is designed with conformal-coated internals to resist condensation, corrosion, and moisture – ideal for the wild temperature swings of Australian weather. With no internal fan to trap dust, and sealed terminals throughout, this is one amp that’s built to survive. Smart thermal and DC output protection modes automatically safeguard your gear from overload, while a solid harness keeps your power grounded even on rough roads.

Key Features & Specs

• 1000W RMS at 1Ω: Stable power delivery, perfect for big bass with low-impedance subwoofers
• Ultra-compact chassis: 211.6 x 130 x 49 mm (8.3 x 5.1 x 1.9 in), ideal for tight installs
• IP55 aluminium housing: Built to resist water, dust, and corrosion – ready for Aussie conditions
• EMI & RFI noise elimination: Advanced D-Class output for clean, interference-free audio
• Conformal coated internals: Prevents condensation and corrosion inside the amp
• Subsonic & Low-Pass Filters: 24 dB Lo-pass (50–250 Hz) + 24 dB Subsonic (25 Hz) for superior bass control
• Balanced differential inputs: Blocks electrical noise for crystal-clear signal

Perfect For

• Motorcycles – fits easily under seats or in saddlebags
• Sport cars – compact installs without giving up boot space
• Trucks & Utes – behind-seat or low-mount applications
• Marine & Powersports – IP-rated and vibration resistant

Specifications

• Channels: 1 Mono
• RMS Output: 600W @ 4Ω / 1000W @ 2Ω / 1000W @ 1Ω
• Frequency Response: 5 – 500 Hz
• THD: 0.1% at 100Hz, 4Ω
• Signal-to-Noise Ratio: 95 dB (A-weighted at 1V)
• Damping Factor: 300 @ 100Hz, 4Ω
• Size: 211.6 x 130 x 49 mm
• Weight: 2.15 kg

Why You’ll Love It

• True plug & play integration: USS works with head units using speaker load detection
• Dust-free fanless design: Silent running and no buildup of road grime inside
• Sealed wiring ports: Prevents oxidation and signal failure
• Smart thermal protection: Auto shut-off saves your gear if things heat up
• Optional remote volume: Add the HRC BM controller (sold separately)