1. Introduction
The HELIX M SIX is a highly versatile 6-channel Class D amplifier designed for various car audio applications, including 3-way, 2-way, or small subwoofer setups. Despite its compact dimensions, it delivers robust power and features a comprehensive set of adjustments for optimal sound performance. This manual provides essential information for the proper installation, operation, and maintenance of your M SIX amplifier.
2. Features
- Highly compact Class D amplifier with high output power of 100 Watts RMS at 4 and 2 Ohms.
- Start-Stop capability, ensuring functionality even with supply voltage drops down to 6V.
- Six-channel RCA input for flexible signal routing.
- Integrated active crossover with adjustable high-pass, low-pass, band-pass, and subsonic filters.
- 'Input Mode' switch for channels E & F, allowing flexible distribution of input signals.
- SMD (Surface Mounted Device) technology for minimal space requirements and maximum reliability.
- Exclusive, very compact design with an illuminated HELIX logo and low heat generation due to high efficiency.
3. Setup and Installation
Proper installation is crucial for the performance and longevity of your amplifier. It is recommended to have the installation performed by a qualified professional.
3.1 Safety Guidelines
- Disconnect the vehicle's battery before starting any installation work.
- Ensure all wiring is correctly routed and secured to prevent damage or short circuits.
- Use appropriate gauge power and ground cables.
- Install the amplifier in a dry, well-ventilated location, away from direct sunlight or excessive heat.
3.2 Amplifier Overview
The HELIX M SIX amplifier features a sleek, compact design. The top panel displays the HELIX logo and model name. The input and control connections are located on one end, while the power and speaker output connections are on the opposite end.
3.3 Input and Control Connections
The input side of the amplifier houses the RCA inputs for channels A through F, along with various controls for input level and crossover settings. The 'Input Mode' switch for channels E & F is also located here.
3.4 Power and Speaker Output Connections
The opposite end of the amplifier provides terminals for power input (+12V, REM, GND) and speaker outputs for all six channels. Ensure correct polarity and secure connections for all speaker wires.
4. Operation and Controls
4.1 Input Level Adjustment
Adjust the 'INPUT LEVEL' controls for each channel pair (A/B, C/D, E/F) to match the output voltage of your head unit. Start with the level set to minimum and gradually increase until a clean, undistorted sound is achieved at high volume levels from your head unit.
4.2 Crossover Settings
The M SIX features an integrated active crossover with adjustable filters for precise sound tuning:
- High-Pass Filter (HPF): Allows frequencies above the set point to pass through. Adjustable from 15 Hz to 4,000 Hz.
- Low-Pass Filter (LPF): Allows frequencies below the set point to pass through. Adjustable from 40 Hz to 4,000 Hz.
- Band-Pass Filter: Achieved by combining HPF and LPF settings, allowing a specific range of frequencies to pass. Adjustable from 15 Hz to 4,000 Hz.
- Subsonic Filter: A high-pass filter specifically for subwoofers, typically set below the audible range to protect the speaker from damaging low frequencies. Adjustable from 15 Hz to 4,000 Hz.
The slope for high-pass and low-pass filters is 12 dB/Octave.
4.3 Input Mode Switch (Channels E & F)
The 'Input Mode' switch for channels E & F allows flexible signal distribution. Refer to the amplifier's control panel (Figure 2) for specific settings and their functions, which typically include options like stereo, summed, or full-range input for these channels.
5. Technical Specifications
| RMS Power (≤ 1% THD+N) @ 4 Ohm | 6 x 100 Watts |
| RMS Power (≤ 1% THD+N) @ 2 Ohm | 6 x 100 Watts |
| Bridged Power @ 4 Ohm | 3 x 200 Watts |
| Max. Power per Channel* | Up to 130 Watts RMS @ 4 / 2 Ohm |
| Amplifier Technology | Class D |
| Inputs | 6 x RCA, 1 x Remote In |
| RCA Input Sensitivity | 0.5 - 6 Volts |
| RCA Input Impedance | 20 kOhm |
| Outputs | 6 x Speaker Output |
| Frequency Response | 10 Hz - 30,000 Hz |
| High-Pass Filter | 15 Hz - 4,000 Hz adjustable |
| Low-Pass Filter | 40 Hz - 4,000 Hz adjustable |
| Band-Pass Filter | 15 Hz - 4,000 Hz adjustable |
| Subsonic Filter / HPF | 15 Hz - 4,000 Hz adjustable |
| Slope High- / Low-Pass | 12 dB/Oct. |
| Signal-to-Noise Ratio (Analog Input) | 98 dB (A-weighted) |
| Total Harmonic Distortion (THD) | 0.05 % |
| Damping Factor | 100 |
| Operating Voltage | 10.5 - 16 Volts (max. 5 sec. down to 6 Volts) |
| Idle Current Consumption | 1,550 mA |
| Operating Temperature Range | -40° C to +70° C |
| Fuse | 2 x 35 A Maxi Blade Fuse (FK3) |
| Power Consumption | DC 12 V Δ 80 A max. |
| Dimensions (H x W x D) | 50 x 320 x 154 mm |
* In typical multi-channel applications (2- / 3-way system + Rear + Subwoofer)
6. Maintenance
The HELIX M SIX amplifier is designed for reliable operation with minimal maintenance. Follow these guidelines to ensure optimal performance:
- Cleaning: Periodically clean the amplifier's exterior with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
- Ventilation: Ensure that the amplifier's cooling fins are free from dust and debris to maintain proper heat dissipation. Do not obstruct airflow around the unit.
- Connections: Occasionally check all power, ground, remote, and speaker connections to ensure they are secure and free from corrosion.
7. Troubleshooting
If you experience issues with your HELIX M SIX amplifier, consult the following common troubleshooting steps:
- No Power: Check the main fuse in the vehicle's power line and the fuses on the amplifier itself. Verify all power and ground connections are secure. Ensure the remote turn-on wire is receiving +12V when the head unit is on.
- No Sound: Check all RCA input cables for proper connection and integrity. Verify speaker wire connections and ensure no shorts exist. Confirm the head unit is sending an audio signal.
- Distorted Sound: Reduce the input level gain on the amplifier. Check for proper crossover settings. Ensure speaker impedance matches the amplifier's capabilities. Inspect speaker wires for damage or shorts.
- Protection Mode (PROTECT LED on): This indicates an internal fault, overheating, or a short circuit in the speaker wiring. Turn off the system, check speaker wiring for shorts, allow the amplifier to cool down, and then restart. If the issue persists, seek professional assistance.
8. Package Contents
The HELIX M SIX amplifier package includes:
- 1 x HELIX M SIX Amplifier
- 1 x Mounting Material (screws, etc.)
- 1 x Instruction Manual (this document)
9. Warranty and Support
HELIX products are covered by a manufacturer's warranty against defects in materials and workmanship. Please refer to the warranty card included with your product or visit the official HELIX website for detailed warranty terms and conditions. For technical support or service inquiries, contact your authorized HELIX dealer or the HELIX customer service department.
