Launched by Soundmagus in 2012, the PK series is a classic lineup of car audio digital amplifiers that has stood the test of time. For over a decade, it has earned the trust and admiration of car audio enthusiasts worldwide—especially across the South American market. It embodies the combined strengths of superb sound quality, powerful output, exceptional reliability, and refined aesthetics. The PK series stands as a defining benchmark in the car audio digital amplifier industry.

High standard, High reliability

Class D amplifiers are known for high efficiency, low power consumption, and minimal heat. The PK series goes further—strictly adhering to the CEA2002 test standard for exceptional long-term reliability and sustained high-power performance.

Modular Circuit Design

Select models feature a modular circuit design, with preamp and power amp stages separated and connected via standardized interfaces.

Balanced input

Balanced signal input circuitry delivers exceptional noise rejection for pristine sound quality.

Intelligent and precise power control

Proprietary MCU-controlled power management module ensures precise power sequencing, shutdown, and multi-layer protection. When multiple amplifiers operate together in a single system, they deliver exceptional consistency and synchronization.

Comprehensive protection functions

All amplifiers feature comprehensive self-protection: under-voltage, over-voltage, overload, over-temperature, short-circuit, and DC-output protection.

Audio-grade High-spec Inductors

The PK series employs audio-grade shielded inductors with high-spec magnetic cores and large-diameter, high-temp enamel wire—far exceeding typical specs—ensuring stable, reliable long-term high-power output.

Patented Large-size High-power Toroidal Transformer

A patented, base-mounted toroidal transformer with an large-size 48MM magnetic core, custom-wound with multi-strand pure copper enamel wire, serves as the fundamental guarantee for sustained full-power output.

High-Spec Large-Capacity Filter Capacitors

Low-ESR, 105°C-rated high-spec large-capacity electrolytic capacitors store ample current, ready for instant delivery to the amplifier circuit.

Large-size Wiring Terminals

Large-size, professionally die-cast wiring terminals ensure reliable cable contact and secure connection, guaranteeing high-current throughput and high-power, low-resistance output.

Multiple Pre-amp Function

Practical pre-amp controls with rich features, including selectable high-pass, low-pass, and Full-pass modes.

Elegant and Robust Exterior Design

Elegant and robust exterior design with refined mounting feet and illuminated logo badge.

Internal PCB layout of the product