Helix Amplify 204 X-Over 4 Channel Amplifier with Crossover and DSP Input
£219.99
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£219.99
Compact 4-Channel Amplifier with Integrated Crossover and DirectDSP Function
The AMPLIFY series brings a new perspective to amplifier design by focusing on precision engineering and purpose-built functionality. Instead of one universal unit, each model in this line is optimized for a particular application. This ensures every amplifier performs exactly as intended — delivering power, clarity, and flexibility for a wide range of setups.
Key Highlights:
High-efficiency 4-channel Class D amplifier with up to 240 watts RMS @ 2 ohms per channel for impactful, clean sound
Bridgeable channels for flexible configurations such as 4-channel, 3-channel, or 2-channel systems
Compact housing for easy installation in tight spaces
Start-stop compatibility down to 6V, ensuring uninterrupted playback during voltage drops
Built-in active crossover with adjustable highpass and lowpass filters, plus input mode switching for detailed sound tuning
DirectDSP mode routes input signals directly to the amplifier stage for unprocessed output, ideal for DSP-based systems
Smart high-level input with ADEP.3 technology for smooth integration into factory audio setups
Advanced Class D design offering excellent sound quality with minimal heat generation
The AMPLIFY 204 X-OVER is engineered for flexible full-range sound applications. With 4 x 100W RMS @ 4Ω, 4 x 190W RMS @ 2Ω, or 2 x 380W RMS bridged @ 4Ω, it offers plenty of headroom for powerful speaker systems. Whether running separate tweeter and woofer channels, or a subwoofer configuration, this amplifier adapts effortlessly.
Its built-in crossover makes tuning simple — adjust frequency ranges to your setup and experience optimized clarity and control. The DirectDSP function allows for future expansion, letting advanced users bypass internal filtering when integrating with external processors.
This amplifier is built to deliver precise highs, clean mids, and controlled low frequencies with minimal distortion. The multi-channel outputs are fully bridgeable, allowing for flexible installations without sacrificing signal purity.
Compact in form yet powerful in output, the AMPLIFY 204 X-OVER maintains a sleek, professional look. The detachable top panel conceals controls and connections for a clean finish, while its refined aluminum construction ensures efficient cooling and durability.
Power RMS (≤ 1% THD+N @ 14.4V):
@ 4Ω: 4 × 100 W
@ 2Ω: 4 × 190 W
Bridged @ 4Ω: 2 × 380 W
Maximum Output (per channel): Up to 240 W RMS @ 2Ω
Amplifier Type: Class D
Inputs:
4 × RCA / Cinch
4 × High-level speaker input
1 × Remote In
Input Sensitivity:
RCA: 1 – 8 V
High-level: 2 – 16 V
Input Impedance:
RCA: 8 kΩ
High-level: 9 – 33 Ω
Outputs: 4 × Speaker terminals
Frequency Response: 10 Hz – 20 kHz
Crossover Filters:
Highpass: 45 – 400 Hz (off switchable)
Lowpass: 45 – 400 Hz (off switchable)
Slope: 12 dB/Octave
Signal-to-Noise Ratio: 99 dB (A-weighted)
THD @ 1 kHz (1 W / 4Ω): < 0.02%
Damping Factor: 70
Operating Voltage: 10.5 – 16 V (up to 5 sec. down to 6 V)
Idle Current: 1.1 A
Fuse Rating: 2 × 30 A (LP-Mini fuse)
Max Power Draw: 70 A
Operating Temp: -40°C to +70°C
Extra Features: Adjustable crossover, input mode switch, start-stop support, ADEP.3 circuit, DirectDSP
Dimensions (H × W × D): 40 × 248 × 114 mm (1.58 × 9.76 × 4.49 in)
HELIX AMPLIFY 204 X-OVER Amplifier
Mounting hardware
Allen keys
Fuse
Connection cable
User manual
2-Year Warranty
