Helix Amplify 201 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 is targeted to a specific use case, ensuring maximum adaptation to the scenario. The result is exactly what the system requires – without unnecessary compromises.

Series 2 - the core of the AMPLIFY platform

This lineup represents the technical heart of the entire series. Compact Class D amplifiers combine high output, full-bridge capability, excellent efficiency and simple 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 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 configuration. 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 DIRECT, which passes the signal purely to an external DSP.

Top-level sound

The AMPLIFY 2-Series is not just an extension of the range – 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 configuration is guaranteed even for the most demanding applications.

AMPLIFY X-OVER - ideal for classic upgrades

The X-OVER variant was designed for easy integration into factory and retrofit systems. With an integrated active crossover with 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 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 Auto Turn-On simplifies installation. The DirectDSP function also allows bypassing the internal crossover to route 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 compact 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 2 × 2 Ω subwoofers wired in parallel.
• Ideal for upgrading factory sound systems’ subwoofers thanks to the integrated active crossover and a high-performance stereo high-level input with input sensitivity up to 32 V RMS.
• High-level input with ADEP.3 for seamless integration into OEM audio systems.
• Crossover with low-pass, subsonic and phase controls for optimal system configuration.
• Additional automatic turn-on via music signal for maximum compatibility with factory audio 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.

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 DSPs in the world, enabling an experienced technician to tune any audio system to perfection and bring an authentic hi‑fi experience into the vehicle. The combination of precise German engineering, state-of-the-art technologies and innovative design delivers clean, dynamic and detailed sound that has won the favor of audiophiles worldwide. HELIX products are known for high efficiency, reliability and seamless integration into modern cars. They are a perfect choice for demanding users who require the best possible sound without compromise. Helix, together with the Brax and Match brands, is part of the German manufacturer Audiotec Fischer.

Product comments

Evaluation

• Car amplifiers 1-channel amplifiers (monoblocks)
• German sound system manufacturer HELIX