High-End Sound Quality – Helix Competition Series
Take your car audio system to the next level with the Helix C Four, a true audiophile-grade 4-channel Class AB amplifier. Designed in Germany for uncompromising sound quality, this amp delivers clean power, ultra-low distortion, and the refined detail demanded by sound quality competitors and serious enthusiasts.

⭐ Features & Highlights:

• True Competition Grade – Helix “C” series amplifier for SQ builds

• Powerful Output:
  • 4 × 150W RMS @ 4Ω
  • 4 × 250W RMS @ 2Ω
  • 2 × 500W RMS bridged @ 4Ω

• Class AB Topology – Warm, dynamic, ultra-linear sound

• Wide Frequency Response – 10 Hz to 80 kHz for ultimate detail

• Premium Build – Dual power supply, oversized heatsink, gold-plated RCA & speaker terminals

• Advanced Crossover Network – Adjustable high-pass and low-pass filters for perfect tuning

• Audiophile Specs – THD: ~0.003%, S/N ratio: 108 dB

📦 Condition & Packaging:

• Item is authentic Helix C Four (Competition Line)

• Condition:New Open Box,

• Ships securely packed with tracking and insurance

🎯 Why This Amp?

The C Four is a reference-grade 4-channel amplifier often paired with the Helix C One mono block for complete SQ systems. Perfect for powering high-end components, active front stage setups, or bridging for subwoofer use. Rare and highly sought after by Helix collectors and audiophiles.

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⚡ Don’t miss your chance to own this legendary Helix C Four — limited availability, serious SQ power!

Premium 4-Channel Class AB Amp • 4 x 150W RMS @ 4Ω • Bridgeable • HELIX Sound Quality

Key Features:

• 4-channel high-end Class AB car amplifier 

• Rated at 4 x 150 watts RMS at 4 ohms

• Rated at 4 x 220 watts RMS at 2 ohms

• Bridgeable to 2 x 440 watts RMS at 4 ohms

• 4 x RCA inputs with optional digital input capability via HDM 2 module 

• Built-in active crossover for flexible system tuning 

Description:
Brand new HELIX C FOUR 4-channel amplifier. This is a serious piece for anyone building a clean, high-performance car audio setup and not messing around with bargain-bin junk. HELIX is known for exceptional sound quality, and the C FOUR delivers with powerful Class AB amplification, strong bridged output, and flexible crossover control. 

Perfect for powering front and rear speakers, a high-end component set, or even a bridged speaker/sub setup depending on your build. Optional expansion via HELIX HDM module adds digital input capability for even more system flexibility. 

Item Specifics:

• Brand: HELIX

• Model: C FOUR

• Type: 4-Channel Amplifier

• Amplifier Class: Class AB

• RMS Power @ 4 Ohms: 4 x 150W

• RMS Power @ 2 Ohms: 4 x 220W

• Bridged RMS Power @ 4 Ohms: 2 x 440W

• Number of Channels: 4

• Inputs: RCA

• MPN: C FOUR

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