HELIX AMPLIFY 204 X-Over 4 channel amplifier

Description

The HELIX AMPLIFY 204 X-Over is far more than a conventional four-channel amplifier. In an ultra-compact format, it combines a powerful Class D amplifier stage with an integrated high-quality crossover and the renowned ACO platform — delivering full HELIX performance in the smallest possible space.

Delivering 4 × 100 Watts RMS @ 4 Ohms and 4 × 190 Watts RMS @ 2 Ohms (with 2 × 380 Watts RMS bridged @ 4 Ohms), it offers outstanding dynamics and an exceptional price-to-performance ratio. Whether used for classic front/rear setups, component speaker systems, or high-power 3-channel configurations with a subwoofer, the AMPLIFY 204 X-Over sets a new benchmark in versatility and sound quality.

Tonal Excellence – True to HELIX

HELIX stands for uncompromising sound quality. The AMPLIFY 204 X-Over features premium components, including:

• High-resolution BurrBrown A/D and AKM D/A converters
• Powerful 64-bit DSP with 1.2 billion MAC operations/second
• Integrated crossover with precise control
• Fully German-engineered signal path

These ensure crystal-clear, dynamic and faithful reproduction across the entire frequency range.

Maximum Flexibility

The amplifier section is highly configurable:

• 4-channel mode for full-range or component applications
• Bridgeable to 3-channel or 2-channel configurations
• 2 × 380 Watts RMS bridged @ 4 Ohms for powerful subwoofer drive

Compact, Efficient and Practical

Despite its extensive feature set, the AMPLIFY 204 X-Over remains remarkably compact thanks to advanced Class D technology and intelligent thermal management.

• Start-Stop capability
• ADEP.3 circuit for perfect OEM integration
• Power Save Mode for reduced current draw when idle

Ideal for modern vehicles where space is at a premium.

Features Overview

• Output Power RMS ≤ 1% THD+N @ 14.4 V
  @ 4 Ohms → 4 × 100 Watts
  @ 2 Ohms → 4 × 190 Watts
  Bridged @ 4 Ohms → 2 × 380 Watts
• Max. output power per channel → Up to 240 Watts RMS @ 2 Ohms / Up to 480 Watts RMS bridged @ 4 Ohms
• Amplifier technology → Class D
• Inputs → 4 × RCA / Cinch or 4 × High-level speaker input, 1 × Remote In
• Outputs → 4 × Speaker output, 2 × RCA / Cinch (pre-outs), 1 × Remote Out
• DSP resolution → 64 Bit
• DSP power → 1 × 295 MHz (1.2 billion MAC operations/second)
• Sampling rate → 48 kHz
• Frequency response → 20 Hz – 22,000 Hz
• Signal-to-Noise Ratio → > 105 dB (A-weighted)
• Total Harmonic Distortion (THD) → < 0.03 %
• Damping Factor → > 100
• Operating Voltage → 10.5 – 16 Volts (max. 5 sec. down to 6 Volts)
• Fuse → 2 × 35 A Maxi-fuse (APX)

Scope of Delivery

• 1 x HELIX AMPLIFY 204 X-Over Amplifier
• 1 x Line Output-to-RCA / Cinch Cable (if required)
  
• 1 x Mounting Material
• 1 x Instruction Manual