Helix Amplify 204 Direct Amplifier

Helix Amplify Amplifiers

The new AMPLIFY amplifier series from HELIX brings a modern approach to amplifier design. Instead of a one-size-fits-all solution, each model is focused on a specific application, ensuring maximum adaptation to the given scenario. The result is exactly what the system requires — with no unnecessary compromises.

Series 2 - the foundation of the AMPLIFY platform

This lineup represents the technical heart of the entire series. Compact Class D amplifiers combine high power, full bridgeability, great efficiency and easy integration into both OEM and aftermarket environments. The result? Detailed highs, solid mids and powerful, controlled bass. Series 2 is available in DIRECT, X-OVER or DSP variants (from summer 2025) — from flexible 6-channel applications to powerful monoblocks for subwoofers, covering every possible configuration.

AMPLIFY 204 - versatile four-channel amplifier

The AMPLIFY 204 offers four bridgeable high-power outputs with precise sound, making it an ideal choice for a wide range of installations. It is suitable for classic 4-channel setups, a 3-channel configuration with a subwoofer or a bridged 2-channel setup. It delivers 4 × 100 W RMS at 4 Ω, 4 × 190 W RMS at 2 Ω, or 2 × 380 W RMS in bridged mode at 4 Ω. It is available in the X-OVER version with an integrated active crossover or as DIRECT, which passes the signal purely to an external DSP.

Top-level sound

The AMPLIFY 2-Series is more than just an extension of the product range — it is a clear expression of HELIX’s philosophy: to deliver top-tier sound and performance for specific purposes. Each model provides excellent audio quality, minimal distortion and an outstanding signal-to-noise ratio. Combined with fully bridgeable channels, flexible configurations are guaranteed even for the most demanding applications.

AMPLIFY DIRECT - Built for external DSP

The DIRECT models with their DirectDSP inputs are designed for use in DSP-based audio systems that require clean, efficient and transparent amplification. By focusing on essential controls and core components, flawless operation is ensured. Removing conventional input filtering preserves uncompromised signal integrity and maximum clarity throughout the signal chain. A high-quality amplification stage and clipping LED allow precise level adjustment, while the minimalist input architecture keeps noise and distortion to an absolute minimum. A practical stereo/mono switch for each stereo input also allows bridged operation using a single RCA signal — eliminating the need for external Y-adapters.

Form follows performance

The HELIX AMPLIFY 2-Series design combines modern functionality with refined technical aesthetics. Its compact dimensions allow flexible installation even in tight spaces. A removable top cover conceals all connections and controls, offering additional protection and a clean, efficient look that highlights the amplifier’s high-quality character. Matte surfaces, sharp contours and a minimalist design language create an elegant, exclusive appearance that integrates seamlessly into any modern vehicle interior.

Key features

• Highly efficient amplifier with high output power up to 240 W RMS at 2 Ω per channel for impressive dynamics and powerful sound.
• Bridgeable output channels for flexible system configuration and maximum output power.
• Very compact design for space-saving installation.
• Support for start-stop operation down to 6 V supply voltage for uninterrupted performance.
• Clipping LED for easy and fast gain setting.
• Designed for HELIX DSP — DirectDSP input perfectly tuned for maximum signal quality and performance.
• Advanced Class D topology for high efficiency and low heat dissipation.

Product comments

Evaluation

• Car amplifiers 4-channel car amplifiers
• German sound system manufacturer HELIX