Hifonics ZXR700/2E Digital Class D 2-Channel Amplifier

Safety Instructions

General Safety:

• This device is designed for operation with a 12V vehicle electrical system only. Incorrect use may result in fire, injury, or electric shock.
• Do not operate the sound system in a way that distracts from safe driving. Perform operations only when the vehicle is safely stopped.
• Adjust volume to a level that allows you to hear exterior noises. Prolonged exposure to extremely loud music can cause hearing loss and impair your awareness of traffic signals.
• Do not cover cooling vents or heat sinks, as this can cause heat accumulation and fire hazards.
• Never open the device. Doing so voids the warranty and poses risks of injury or electric shock.
• Always replace fuses with ones of the same rating.
• Do not use the device if a malfunction occurs and cannot be remedied. Refer to the troubleshooting section and consult an authorized retailer.
• Installation and interconnection should only be performed by skilled personnel with technical aptitude and experience.
• Disconnect the vehicle's battery ground connection before starting installation to prevent short circuits and electric shocks.
• Choose an appropriate mounting location that ensures sufficient air circulation. Avoid areas with high humidity and dust.
• Mount the device and other components securely to prevent them from becoming loose and acting as dangerous projectiles.
• Ensure all terminals are connected correctly to prevent fire hazards and device damage.

Installation Specifics:

• When drilling mounting holes, avoid damaging vehicle components like fuel lines, gas tanks, or electrical cables.
• Do not install audio and power supply wires together. Separate them to avoid interference.
• Ensure cables are routed to avoid snagging on objects like the steering wheel, gear lever, or brake pedal.
• Do not splice electrical wires; use appropriate distribution blocks for power supply to other devices.
• Never use brake or steering system components as ground points.
• Protect cables from sharp edges and moving parts using rubber grommets where necessary.
• Keep small parts and jacks away from children to prevent accidental swallowing and injury.

Disposal/Recycling:

Dispose of electronic devices responsibly at a recycling facility according to local regulations. More information is available at www.audiodesign.de/english/disposal.

Environmental Conditions:

• Operating Temperature: -25°C to 50°C
• Humidity: 10% to 90% (non-condensing)

Technical Specifications

* Prevents error messages in the vehicle diagnostic system.

Intended Use:

This product is designed for use in a vehicle with a 12-volt on-board voltage and negative ground, functioning as an amplifier for audio signals. Any other use may lead to product damage or damage to the surrounding environment.

Mechanical Installation

General Guidelines:

• Avoid damaging vehicle components such as airbags, cables, board computers, seat belts, or the gas tank during installation.
• Ensure the chosen location provides sufficient air circulation for the amplifier. Do not mount in small, sealed enclosures without airflow or near heat-dispersing parts or vehicle electronics.
• Keep all cables as short as possible to minimize losses and interference.
• Use self-tapping screws (not included) for installation.

Fastening Methods:

• Installation A: Surface Mount with Housing
  Screws are not included.
• Installation B: Flush Mount without Housing
  Requires disassembly of the housing. Suitable for dashboard or center console mounting. A 7 mm hole may be required.

Caution: Before installation, disconnect the vehicle battery's ground connection to prevent electric shocks and short circuits.

Electrical Interconnection

Before Connecting:

Use appropriate wiring kits from car audio retailers. Ensure correct cable cross-section and fuse rating. Clean contact points on the battery and ground connection. Tighten all screws securely after installation to prevent malfunctions.

Connection Points:

• 1. GND: Connect to a suitable, clean metallic ground point on the vehicle chassis. Ensure a stable connection to the battery's negative terminal. Use a ground wire of adequate cross-section, matching the +12V wire.
• 2. REM: Connect to the turn-on signal (REM) of your head unit. A 0.5 mm² cable is sufficient. This enables automatic amplifier turn-on/off with the head unit.
• 3. +12V: Connect to the vehicle battery's positive terminal using a suitable cable of adequate cross-section.
• 4. FUSES: Slot for device fuses (2 x 30 A). Replace only with identical fuses.
• 5. ADDITIONAL CABLE FUSE (NOT INCLUDED): Install an inline fuse near the battery (max. 30 cm distance) for the +12V power cable. Fuse size must match the cable cross-section. This fuse protects the cable, not the amplifier directly.

Cable Cross-Section Guide (Minimum in mm²):

Recommended Minimum Cable Cross-Section:

• Up to 3 m length: 16 mm²
• From 3 m length: 20 mm²

Caution: Replace defective fuses only with new ones of the same type and rating.

Description of Operation

Front Panel Controls:

• 6. POWER/PROTECT LED: Green LED indicates operation; Red LED indicates a malfunction. Refer to troubleshooting.
• 7. AUTO TURN-ON: For head units without a REM signal. Uses HIGH LEVEL INPUTs; detects a 6V DC offset to turn on/off.
• 8. REMOTE: Connects the included bass level remote controller for adjusting bass from the driver's seat. Use only the supplied controller and cable.
• 9. BASS BOOST: Adjusts bass boost from 0 dB to +12 dB at 45 Hz. Use with caution to avoid distortion.
• 10. FREQ: Sets the crossover frequency (50 Hz to 5000 Hz), dependent on the X-OVER MODE setting.
• 11. X-OVER MODE: Selects operating mode: FULL (full range), HP (high pass, frequency limited downwards via FREQ), LP (low pass, frequency limited upwards via FREQ).
• 12. LEVEL INPUT: Adjusts input sensitivity. Set head unit volume to 80-90%, then slowly increase LEVEL INPUT until slight distortion is heard, then back off slightly.
• 13. HIGH LEVEL INPUT: Use if the head unit lacks RCA pre-amp outputs. Connect speaker cables from the head unit via the included harness.
• 14. LINE OUTPUT: RCA outputs providing a linear full-range audio signal for an additional amplifier.
• 15. LINE INPUT: RCA inputs for connecting to head unit pre-amplifier outputs.

Application Examples

Example 1: Full Range or High Pass (HP) Operation with RCA Inputs

Connects the head unit's RCA outputs to the amplifier's LINE INPUT (L/R). Speaker outputs connect to speakers. X-OVER MODE set to FULL or HP. FREQ control adjusts HP filter if set to HP.

Example 2: Bridged Operation (1-8 Ω) with RCA Inputs

Connects the head unit's RCA outputs to the amplifier's LINE INPUT (L/R). Speaker outputs are bridged to a single speaker (e.g., subwoofer) with 1-8 Ω impedance. X-OVER MODE set to FULL.

Example 3: Low Pass (LP) Operation with RCA Inputs

Connects the head unit's RCA outputs to the amplifier's LINE INPUT (L/R). Speaker outputs connect to a speaker (e.g., subwoofer) with 2-8 Ω impedance. X-OVER MODE set to LP. FREQ control adjusts LP filter.

Example 4: High Level Input Operation

Connects the head unit's speaker outputs directly to the amplifier's HIGH LEVEL INPUTs using the provided harness. AUTO TURN-ON must be enabled.

Trouble Shooting

No Function / Power LED Not Illuminated:

• Check the main fuse on the power cable. Replace if defective.
• If the fuse blows repeatedly, check the +12V power cable for short circuits to ground or damage.
• If the fuse is intact, check for voltage at the +12V terminal using a voltmeter.
• If voltage is present, check the REM connection. Ensure the AUTO TURN-ON switch is set correctly (OFF for REM, ON for High Level Auto-Turn-On). Test by switching AUTO TURN-ON to ON.
• If voltage is present at REM, the amplifier may be defective. Contact your retailer.
• If using High Level Inputs, ensure AUTO TURN-ON is ON. Check speaker cables for shorts or damage.

Power LED On, No Sound from Speakers:

• Low Level Mode: Verify RCA cable connections. Test RCA cables on another device; replace if defective.
• High Level Mode: Verify speaker cable connections to head unit and amplifier. Test speaker cables; replace if defective.
• Check speaker cable connections between amplifier outputs and speakers/subwoofer. Test speaker cables; replace if defective.
• Ensure crossover filters (HPF/LPF) are set correctly and not interfering with sound.
• Verify input mode switch and crossover switches are set appropriately.
• Test speakers/subwoofers with a 9V battery. If no sound, they may be defective.
• Check head unit settings (fader, balance, mute, filters, pause, source).

Distortion or Hissing Noise:

• Reduce input level and Bass Boost controls on the amplifier.
• Reduce or disable loudness and EQ settings on the head unit.

Engine Speed Dependent Noise:

• Ensure RCA cables are routed separately from power cables.
• Verify amplifier ground connection is secure and not directly to the battery negative terminal. Use contact spray if needed.
• Check the conductivity of the vehicle battery's ground cable to the body.

Active Tweeter Distorted or Cracked:

• Set crossover mode switch to High Pass (HP/HPF).
• Adjust the high-pass filter carefully to prevent damage to tweeters from low frequencies.

Amplifier Activates Protective Circuit / Protect LED Lights Up:

• Short Circuit on Speaker Cables: Disconnect all speaker cables. Measure speaker impedance. If less than 0.5 Ohms, check for shorts in wiring or speakers.
• Low Load Impedance: Ensure speaker impedance meets amplifier specifications (e.g., not less than 2 Ohms if designed for 2 or 4 Ohm operation).
• Power Cable Cross-Section Too Small: Use cables with adequate cross-section to prevent voltage drop and overheating.
• Amplifier Overheated: Ensure adequate airflow for the heat sink. Relocate if necessary. Turn off the system for 30 minutes to cool down.