Helix Amplify 201 X-OVER Amplifier

Helix Amplify Amplifiers

The new AMPLIFY amplifier series from HELIX offers a modern approach to amplifier design. Instead of a one-size-fits-all solution, each model focuses on a specific application, ensuring maximum adaptation to the given scenario. The result is exactly what the system requires – without unnecessary compromises.

Series 2 - the technical heart of the AMPLIFY platform

This model range represents the technical core of the entire series. Compact class D amplifiers combine high power, full-bridge capability, excellent efficiency and easy integration into 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 model offers four bridgeable outputs with high power and 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 2-channel bridged setup. It provides 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 an X-OVER version with an integrated active crossover or as DIRECT, which passes the signal purely via an external DSP.

Top-level sound

The AMPLIFY 2-Series is not just an extension of the lineup – it is a clear expression of HELIX’s philosophy: to deliver top-tier sound and performance for specific purposes. Each model delivers excellent sound quality, minimal distortion and a great signal-to-noise ratio. Combined with fully bridgeable channels, flexible configuration is guaranteed even for the most demanding applications.

AMPLIFY X-OVER - ideal for classic upgrades

The X-OVER variant was created for easy integration into factory and retrofit systems. Thanks to the integrated active crossover with adjustable filters and an input mode switch, the system can be configured precisely. The amplifier can handle an active front system, a passive front/rear speaker combination or a setup with a subwoofer. Switchable RCA and high-level inputs (up to 16 V) together with the ADEP.3 circuit guarantee compatibility with OEM radios, while the Auto Turn-On feature simplifies installation. The DirectDSP function additionally allows bypassing the internal crossover and routing the signal directly to the power stage – ideal for later expansion with an external DSP.

Design and practicality

HELIX AMPLIFY 2-Series combines a modern look with practical construction. Thanks to its small dimensions, the amplifier is easy to install even in tight spaces. The removable top cover protects the controls and connectors while providing a clean, professional appearance. A matte finish, precise lines and a minimalist design emphasize the premium character and blend elegantly with the vehicle interior.

Main features

• Highly efficient subwoofer amplifier with high output power up to 750 W RMS at 1 Ω - perfect for any pair of 2 × 2 Ω subwoofers wired in parallel.
• Ideal for upgrading factory subwoofers thanks to the integrated active crossover and a high-performance high-level stereo input with input sensitivity up to 32 V RMS.
• High-level input with ADEP.3 for seamless integration into OEM sound systems.
• Crossover with low-pass, subsonic and phase controls for optimal system configuration.
• Additional auto turn-on via music signal for maximum compatibility with factory sound systems.
• Very compact design for space-saving installation.
• Start-stop capability down to 6 V supply voltage for uninterrupted performance.
• Advanced class D concept for high efficiency and low heat dissipation.
• Wired remote control for volume adjustment.

Product comments

Evaluation

• Car amplifiers 1-channel car amplifiers
• German sound system manufacturer HELIX