HELIX AMPLIFY 201 X-OVER MONO AMPLIFIER

.

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

The 2 Series marks the entry point to 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 – the 2 Series brings all facets of natural and powerful sound to every vehicle, with sound quality and performance values far exceeding expectations in its class. Whether as a DIRECT, X-OVER, or DSP version (from summer 2025): everything is offered, from flexible 6-channel configurations for full-range applications to a powerful 1-channel subwoofer powerhouse.

.

AMPLIFY 201 – The Specialists for Subwoofer Performance

Uncompromising bass power in the smallest space: The AMPLIFY 201 monoblocks are specially designed for use as subwoofer amplifiers and deliver superior performance with high control – ideal for powerful bass reproduction with maximum precision. With up to 750 W RMS at 1 ohm, adjustable subsonic and low-pass filters, and adjustable phase shift in the X-OVER version, or an uncompromisingly pure signal path in the DIRECT version, as well as their compact design, the AMPLIFY 201 are the optimal choice for targeted subwoofer upgrades in modern sound systems.

.

Sound and Performance – Above the Standard

The AMPLIFY 2 Series not only represents perfectly tailored solutions for a variety of applications, but also 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 bridgeable multi-channel outputs throughout for maximum performance and installation flexibility. The result: a series that doesn't define itself by its class, but rather 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 solution for conventional sound upgrades with factory radios or aftermarket head units. Switchable high-level and RCA inputs allow seamless integration into a wide variety of system configurations. The high-level input is designed for input voltages up to 32 V and guarantees maximum compatibility with modern factory radios and premium sound systems. In addition, an integrated automatic power-on function allows the amplifier to be activated via the music signal – without the need for an external remote signal. The active crossover offers precise signal tuning with high-quality 12 dB low-pass and subsonic filters, phase control, an input mode switch, and the option to connect an included remote control. The package is rounded off by the ADEP.3 circuit, which prevents interference in OEM systems and ensures smooth integration.

.

Form follows function

The design of the HELIX AMPLIFY 2 Series combines modern functionality with a clean, technical look. The compact dimensions allow for flexible installations, even in tight spaces. A removable panel conceals connections and controls, providing additional protection and creating a tidy, high-quality overall impression. Matte surfaces, precise lines and a reduced design language ensure a stylish, exclusive look that fits seamlessly into any modern vehicle interior.

.

Technical Specifications

• Power RMS ≤ 1% THD+N @ 14.4 V
• – @ 4 ohms 1 x 250 watts
• – @ 2 ohms 1 x 450 watts
• – @ 1 ohm 1 x 750 watts*
• – bridged at 4 ohms –
• – bridged at 2 ohms –
• Max. Power Up to 850 watts RMS @ 1 ohm
• Amplifier Technology Class D
• Inputs 1 x RCA
• 2 x High-Level Speaker Inputs
• 1 x Remote In
• 1 x Remote Control Input
• Input Sensitivity RCA: 0.5 – 6 volts
• High-Level: 3 – 32 volts
• Input Impedance RCA: 8 kOhms
• High-Level: 9 – 33 ohms
• Outputs 1 x Speaker Output
• Output Voltage RCA –
• Signal Converter for the Digital Input –
• Frequency Response 10 Hz – 250 Hz
• Bass Boost –
• Highpass –
• Lowpass 50 Hz – 250 Hz adjustable
• Bandpass –
• Subsonic 10 Hz – 50 Hz adjustable
• Phase 0° – 180° adjustable
• Highpass / Lowpass Slope: 12 dB/oct.
• Subsonic Slope 12 dB/oct.
• Subsonic / Low-Pass Filter Slope –
• Signal-to-Noise Ratio (A-weighted) 114 dB @ Maximum Power
• Total Harmonic Distortion (THD @ 1 kHz, 1 W at 4 ohms) –
• Total Harmonic Distortion (THD+N @ 1 kHz, 1 W at 4 ohms) –
• Total Harmonic Distortion (THD @ 100 Hz, 1 W at 4 ohms) < 0.003%
• Total Harmonic Distortion (THD+N @ 100 Hz, 1 W at 4 ohms) < 0.02%
• Attenuation Factor 200
• Operating Voltage 10.5 – 16 V (max. 5 seconds down to 6 V)
• No-Load Current Consumption 1,100 mA
• Fuse 2 x 30 A LP mini plug-in fuses
• Power Consumption DC 12 V ⎓ 80 A Max.
• Ambient operating temperature range: -40°C to +70°C
• Additional features: Active, adjustable crossover, start-stop capability, high-level input with automatic switch-on, ADEP.3
• Dimensions (H x W x D) 40 x 248 x 114 mm
• * Continuous 1 ohm output only achieved with a music signal

Scope of delivery

• 1 x HELIX AMPLIFY 201 X-OVER amplifier
• 1 x Wired remote control
• 2 x Allen keys
• 1 x Connection cable
• 2 x Fuse
• 1 x Mounting hardware
• 1 x User manual