HELIX AMPLIFY 204 X-Over

HELIX AMPLIFY – Powerful. Clear. Consistent.

With AMPLIFY, HELIX redefines the standards for modern amplifier design: through a contemporary interpretation of classic concepts. Instead of "one-size-fits-all" solutions, AMPLIFY focuses on specialized models precisely tailored to different applications. This rigorous philosophy guarantees that each model delivers maximum performance for its intended use – while concentrating on the essentials.

The 2 Series marks the entry point into the AMPLIFY platform – and simultaneously forms its technical and sonic core. These compact Class D amplifiers combine power, a fully bridgeable multi-channel architecture, and outstanding efficiency with practical integration capabilities. Brilliant and precise highs, controlled mids, and tight, powerful bass – with sound quality and performance far exceeding expectations in its class, the 2 Series brings all facets of natural and powerful sound to every vehicle. Whether as a DIRECT, X-OVER, or DSP variant (from summer 2025): Everything is offered, from flexible 6-channel configurations for full-range applications to a powerful 1-channel subwoofer amplifier. AMPLIFY 204 – The versatile solution for full-range applications. The AMPLIFY 204 amplifiers combine four fully bridgeable outputs with excellent sound and impressive performance – ideal for powerful front-of-house or multi-channel setups. Whether classic 4-channel operation, a 3-channel configuration with a subwoofer, or bridged 2-channel solutions: The 204 adapts flexibly to the requirements of a wide variety of vehicles and system designs. With a power output of 4 x 100 watts RMS at 4 Ω, 4 x 190 watts RMS at 2 Ω, or 2 x 380 watts RMS bridged at 4 Ω, it offers more than enough power for ambitious setups. Available in the X-OVER version with an active crossover or as a DIRECT model for purist operation with external DSPs, high-quality sound performance is always the focus. Sound and performance – above the standard. The AMPLIFY 2 series not only stands for perfectly tailored solutions for different applications, but also for the clear goal of exceeding the expectations of its class in terms of sound and performance in each of these applications. All amplifiers in the series offer brilliant sound quality, low distortion, and outstanding signal-to-noise ratios – coupled with consistently bridgeable multi-channel outputs for maximum power and installation flexibility. The result: A series that doesn't define itself by its class, but sets new standards within it – making it the first choice for anyone seeking application-oriented performance without compromise. AMPLIFY X-OVER – Maximum Flexibility for Classic Upgrades The AMPLIFY X-OVER models are the ideal choice for conventional sound upgrades with factory radios or aftermarket head units. At its heart is the integrated, active crossover with high-quality, adjustable high- and low-pass filters and an input mode switch – enabling precise signal tuning and facilitating the implementation of a wide variety of system configurations. Whether for an active front system with separate control of tweeters and woofers, the operation of passive front and rear systems, or the combined use of a front system with a subwoofer via bridged channels: The X-OVER models offer maximum flexibility in system design. Switchable high-level and RCA inputs with up to 16 V input sensitivity allow integration into virtually any factory or aftermarket environment. The integrated ADEP.3 circuitry ensures flawless communication with OEM radios, while an automatic power-on function minimizes installation effort. As an additional feature, the DirectDSP function allows the input signal to bypass the crossover and be routed directly to the power amplifier – ideal for those who plan to upgrade their system with an external DSP at a later date. Form follows function. The design of the HELIX AMPLIFY 2 series combines modern functionality with a clean, technically sophisticated look. Its compact dimensions allow for flexible installation, even in confined spaces. A removable front panel conceals connections and controls, providing additional protection and creating a clean, high-quality overall appearance. Matte surfaces, precise lines, and a minimalist design language create a stylish, exclusive look that blends seamlessly into any modern vehicle interior.

Features

• Highly efficient amplifier with high output power of up to 240 watts RMS @ 2 ohms per channel for impressive dynamics and powerful sound
• Bridging output channels for flexible system configurations and maximum power output
• Very compact design for easy integration even in confined spaces
• Start-stop capability down to 6V supply voltage for uninterrupted performance
• Integrated active crossover with high-pass and low-pass filters, as well as an input mode switch for optimal system configuration
• DirectDSP function – the input signal bypasses the integrated active crossover and is passed unfiltered to the power amplifier
• Intelligent high-level input with ADEP.3 for seamless integration into OEM sound systems
• Advanced Class-D design for high efficiency with minimal heat generation

Technical Data

* One channel driven (≤ 10% THD+N @ 14.4 V)

Scope of Delivery

1 x HELIX AMPLIFY 204 X-OVER amplifier
2 x Allen keys
3 x Connection cables
2 x Fuses
1 x Mounting hardware
1 x User manual