VA4-1800D | 1800W Class A/B 4 Channel Vertigo Series Car Amplifier

Power Acoustik VA4‑1800D Vertigo Series 4-Channel Class A/B Full-Range Amplifier – Compact Build, Full Control

The Power Acoustik VA4‑1800D delivers clean, consistent multi-channel power without unnecessary complexity. Built as part of the Vertigo Series, this 4-channel Class A/B full-range amplifier strikes a balance between traditional analog warmth and modern signal control, giving you the flexibility to drive door speakers, tweeters, or even bridge channels to a compact subwoofer.

At 1800 watts peak and 640 watts total RMS, the VA4‑1800D supports system upgrades where sound quality and installation space both matter. Whether integrating with a factory head unit or feeding signal from an aftermarket source, this amp adapts—thanks to high-level signal sensing input and low-level RCA compatibility.

Precision Power for System Builders

Delivering 100W x 4 @ 4Ω, 160W x 4 @ 2Ω, or 320W x 2 bridged @ 4Ω, this amplifier configures easily across stereo or bridged applications. Each channel supports variable high-pass and low-pass crossovers, ideal for dialing in frequency ranges per speaker size and placement.

A built-in 12dB bass boost enhances low-frequency output when running component or coaxial systems without a dedicated subwoofer amp. All crossover and gain adjustments are accessible on the side panel—no buried settings or advanced tuning gear needed.

Reliability in Every Install

The VA4‑1800D uses a MOSFET power supply with audiophile-grade IR transistors, built on a military-grade SMT PCB for efficient signal transfer and heat management. Key protection systems include thermal overload, short circuit protection, and auto shut-off against impedance mismatch or installation faults.

Smart OEM Integration

One of the standout features is its Hi-Level auto turn-on. When connected via speaker-level inputs, the amp automatically powers up with your vehicle’s stock audio signal—eliminating the need for a dedicated remote turn-on wire. It’s a must-have for modern vehicles with restricted electrical access or digital head units.

Technical Highlights:

• Class A/B full-range 4-channel amplifier
• 1800W max power
• 100W x4 @ 4Ω, 160W x4 @ 2Ω, 320W x2 @ 4Ω bridged
• MOSFET power supply, SMT board layout
• High-level input with signal-sensing auto turn-on
• RCA low-level input (200mV–6V)
• Variable HP/LP crossover controls
• 12dB bass boost
• Thermal, short, and overload protection
• Compact chassis (approx. 11.75" x 8.75" x 2")
• 4-gauge power terminals, 8-gauge speaker outputs

Whether you’re upgrading a factory system or running multiple components off a single chassis, the Power Acoustik VA4‑1800D provides the foundation needed for clean, controlled, and flexible car audio.