Package Includes: (1) Rockville dB55 4000 Watt/980 Watt Dyno-Certified RMS 5 Channel Amplifier Car Stereo Amp, (1) Rockville RWK42 4 Gauge 4 Chan Car Amp Wiring Installation Wire Kit (2) RCA's Compact 5-Channel Design: The Rockville dB55 delivers 4000-Watt Peak / 980-Watt Dyno Certified RMS across five channels with selectable output modes for stereo speakers plus a bridged sub channel. Dyno Certified RMS lists 2-Ohm: 120W x4 + 500W x1 and 4-Ohm: 80W x4 + 300W x1. The amp is 2-Ohm stable, maintains minimum THD < 0.05%, S/N ratio >90dB and a damping factor >100@100Hz with a 15–35kHz frequency response for clear, controlled audio. Dyno-Certified Power & Topology: Rockville provides both peak and Dyno Certified RMS so shoppers can compare fairly to budget and premium brands. Peak ratings include 2-Ohm: 480W x4 + 2000W x1 and 4-Ohm: 320W x4 + 1200W x1. The dB55 uses a high-speed MOSFET power supply, optical-coupler Class AB + D hybrid topology and studio-grade bipolar output transistors; built-in under-voltage protection at 10V and over-voltage protection at 16V improve reliability during heavy use. Precision Tone Controls & Protection: The dB55 includes a fully adjustable 12 dB/octave crossover with differential circuitry, low-pass (CH1–CH4) 40Hz–4kHz and CH5 50Hz–250Hz, high-pass 15Hz–4kHz, and a subsonic filter 15Hz–55Hz. It also offers a 12 dB bass equalizer, 8-Volt preamp circuitry, status mode LED indicator, remote dashboard subwoofer control, mute and delay soft-start, and full IC-controlled protection with a professional peak limiter for distortion-free playback. Installer-Friendly Amp Kit: The included Rockville RWK42 4-AWG installation kit features two 17' twisted-pair 100% copper RCA cables (blue/silver), 17' SuperFlex power cable, 17' speaker and remote leads, 3' clear ground, massive gold-plated 80A AGU fuse with holder, 7' split loom, and a soft abrasion-proof PVC jacket rated -40°F to 220°F. Accessories include wire ties, ring terminals, butt connectors, spades and grommets to ensure low-resistance, neat routing and reliable connections. Rockville dB55 bundle delivers measured Dyno Certified RMS power and a complete installation kit for installers and car-audio enthusiasts who want defined stereo output plus a dedicated bridged sub channel. The package pairs the dB55 5-channel amplifier with the RWK42 4-AWG wiring kit to provide both tunable performance and robust power delivery.

The amplifier offers selectable output configurations and certification-backed power figures so customers can compare RMS results to leading brands. Controls include a fully adjustable 12 dB/octave crossover, low-pass and high-pass filters, subsonic filter and a 12 dB bass equalizer for precise tuning. Reliability features include a high-speed MOSFET power supply, optical-coupler Class AB + D topology, studio-grade bipolar output transistors, under-voltage and over-voltage protection, and full IC-controlled protection with a peak limiter.

Key Specs:
Power: 4000-Watt Peak / 980-Watt Dyno Certified RMS; 2-Ohm: 120W x4 + 500W x1; 4-Ohm: 80W x4 + 300W x1
Filters & EQ: Fully adjustable 12 dB/octave crossover; Low-pass CH1–CH4 40Hz–4kHz, CH5 50Hz–250Hz; High-pass 15Hz–4kHz; Subsonic 15Hz–55Hz; 12 dB bass EQ
Performance & Protection: Min THD < 0.05%; S/N ratio >90dB; Damping factor >100@100Hz; Under-voltage 10V / Over-voltage 16V; Remote subwoofer control

This bundle is aimed at installers and enthusiasts seeking measurable performance, flexible tuning, and a quality wiring kit to ensure low-resistance power delivery and a neat install. Rockville’s documented testing and component choices provide transparent specifications and competitive value for customers comparing RMS-rated amplifiers.