Helix Amplify 201 Direct Amplifier

Helix Amplify Amplifiers

The new AMPLIFY 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 intended scenario. The result is exactly what the system needs – without unnecessary compromises.

Series 2 - the foundation of the AMPLIFY platform

This model line represents the technical heart of the entire series. Compact Class D amplifiers combine high power, full-bridge capability, excellent efficiency and easy integration into both OEM and aftermarket environments. The result? Detailed highs, firm 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 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 setups, 3-channel systems with a subwoofer or 2-channel bridged configurations. 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 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 expansion of the lineup – it is a clear statement of HELIX's philosophy: to deliver premium sound and performance for specific purposes. Each model provides excellent audio quality, minimal distortion and an outstanding signal-to-noise ratio. Combined with fully bridgable channels, this guarantees flexible configurations even for the most demanding applications.

AMPLIFY DIRECT - built for external DSP

The DIRECT models with their DirectDSP inputs are designed for audio systems based on DSP 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 purity throughout the signal path. 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 enables bridged control using just one 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 hides all connections and controls, offering additional protection and a clean, efficient appearance that emphasizes the amplifier’s premium character. Matte surfaces, sharp contours and a minimalist design language create an elegant and exclusive look that integrates seamlessly into any modern vehicle interior.

Key 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 powerful high-level stereo 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 filter and phase control for optimal system tuning.
• Additional automatic turn-on via music-sensing 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 topology 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 premium car audio that for more than 35 years has ranked among the world’s leaders in amplifiers and DSP processors. HELIX is regarded as a leader in digital signal processors and offers some of the most advanced and highest-quality DSP units in the world, enabling an experienced technician to tune any audio system to perfection and bring an authentic hi‑fi experience into the car. The combination of precise German engineering, state-of-the-art technologies and innovative design delivers a clean, dynamic and detailed sound that has earned the favor of audiophiles worldwide. HELIX products are characterized by high efficiency, reliability and perfect integration into modern vehicles. They are the ideal choice for demanding users who require the best possible sound without compromise. Helix, together with Brax and Match, is part of the German manufacturer Audiotec Fischer.

Product comments

Evaluation

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