Helix Amplify 204 X-OVER Amplifier

Helix Amplify Amplifiers

The new AMPLIFY amplifier series from HELIX offers a modern approach to amplifier design. Rather than a one-size-fits-all solution, each model is focused on a specific application to ensure maximum optimization for the intended scenario. The result is exactly what the system needs—without unnecessary compromises.

Series 2 - the core of the AMPLIFY platform

This model line represents the technical heart of the series. Compact Class D amplifiers combine high power, full bridging capability, excellent 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 versions (from summer 2025) – from flexible 6-channel setups to powerful monoblocks for subwoofers, covering every possible configuration.

AMPLIFY 204 - a versatile four-channel amplifier

The AMPLIFY 204 offers four bridgable 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 wiring, a 3-channel setup with a subwoofer, or a bridged 2-channel arrangement. 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 an X-OVER version with an integrated active crossover, or as a DIRECT variant that 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 audio quality, minimal distortion and a strong signal-to-noise ratio. Combined with fully bridgable channels, it guarantees flexible configuration 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 speaker combination or a setup including 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 function simplifies installation. The DirectDSP feature also allows bypassing the internal crossover to route the signal directly to the power stage—ideal for future expansion with an external DSP.

Design and practicality

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

Main features

• Output power up to 240 W RMS per channel at 2 Ω for strong, dynamic sound.
• Bridgable 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 power stage.
• Intelligent high-level input with ADEP.3 for easy connection to OEM systems.
• Modern Class D technology for efficiency and low heat dissipation.

About the brand

HELIX by Audiotec Fischer is a German brand of high-end car audio equipment that has been among the world leaders in amplifiers and DSP processors for more than 35 years. HELIX is regarded as a leader in digital signal processors, offering some of the most advanced and highest-quality DSP units available, allowing an experienced technician to tune any audio system to perfection and deliver an authentic hi‑fi experience in the car. The combination of precise German engineering, cutting-edge technology and innovative design produces clean, dynamic and detailed sound that has won the favor of audiophiles worldwide. HELIX products are characterized by high efficiency, reliability and excellent integration into modern vehicles. They are the perfect choice for demanding users who require the best possible sound without compromise. Helix, together with the brands Brax and Match, is part of the German manufacturer Audiotec Fischer.

Product comments

Evaluation

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