Helix Amplify 204 X-OVER 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 focuses on a specific application, ensuring maximum adaptation to the intended scenario. The result is exactly what the system needs—without unnecessary compromises.

Series 2 - the core of the AMPLIFY platform

This lineup represents the technical heart of the whole series. Compact Class D amplifiers combine high power, full-bridging capability, excellent efficiency and easy integration into OEM and aftermarket environments. The result? Detailed highs, solid mids and strong, controlled bass. Series 2 is available as DIRECT, X-OVER or DSP (from summer 2025) variants—ranging 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, 3-channel systems with a subwoofer or 2-channel bridged use. 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. Available as an 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 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 provides excellent sound quality, minimal distortion and a great signal-to-noise ratio. Combined with fully bridgeable channels, flexible configurations are 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. With an integrated active crossover featuring adjustable filters and an input mode switch, the system can be precisely configured. The amplifier can handle an active front system, a passive front/rear combination or a setup with a subwoofer. Switchable RCA and high-level inputs (up to 16 V) together with the ADEP.3 circuit ensure 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 compact dimensions, the amplifier is easy to install even in tight spaces. The removable top cover protects 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.

Key features

• Output power up to 240 W RMS per channel at 2 Ω for powerful, dynamic sound.
• Bridgeable channels for flexible wiring and maximum power.
• Compact dimensions save space during installation.
• Start-stop compatibility down to 6 V input voltage.
• Integrated active crossover with adjustable filters and input switch.
• DirectDSP function — ability to bypass the internal crossover and send the signal directly to the output stage.
• Intelligent high-level input with ADEP.3 for easy connection to OEM systems.
• Modern Class D technology for efficiency and low heat loss.

Product comments

Evaluation

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