1. Introduction
The HERTZ H8 DSP is a high-performance digital signal processor designed to optimize the audio experience in automotive sound systems. It provides advanced control over audio signals, allowing for precise equalization, crossover adjustments, time alignment, and other sound tuning functionalities. This manual provides essential information for the proper installation, operation, and maintenance of your H8 DSP unit.
2. Safety Information
Please read and understand all safety instructions before installing or operating the HERTZ H8 DSP. Failure to follow these guidelines may result in injury or damage to the device or vehicle.
- Professional Installation Recommended: Installation should be performed by qualified personnel to ensure proper wiring and system integration.
- Power Disconnection: Always disconnect the vehicle's battery negative terminal before making any electrical connections to prevent short circuits.
- Proper Wiring: Ensure all wiring is correctly connected according to the diagrams provided. Incorrect wiring can cause damage to the unit or other components.
- Ventilation: Install the unit in a location that allows for adequate ventilation to prevent overheating.
- Avoid Moisture: Do not expose the unit to water or excessive moisture.
- Secure Mounting: Mount the unit securely to prevent it from becoming a projectile in the event of sudden stops or collisions.
- Volume Levels: Prolonged exposure to high volume levels can cause hearing damage. Adjust volume responsibly.
3. Package Contents
Verify that all items are present in the package before proceeding with installation:
- HERTZ H8 DSP Processor Unit
- USB Cable
- Power/Speaker Harness
- Mounting Hardware (screws, brackets)
- User Manual (this document)
4. Product Overview
The HERTZ H8 DSP unit features a comprehensive layout for inputs, outputs, and control connections. Understanding the physical layout is crucial for proper installation and operation.
Detailed Description of Figure 1:
The image displays the top panel of the HERTZ H8 DSP unit, illustrating its various connection points and controls. From left to right, top to bottom:
- Top Edge (Output Section): Eight RCA output channels are clearly labeled CH1 through CH8, designated as 'OUTPUT'. These are for connecting to external amplifiers.
- Left Side (Control & Input Section):
- PC Port: A USB Type-B port for connecting the DSP to a computer for software configuration.
- DRC Port: For connecting the optional Digital Remote Control (DRC HE) unit.
- OPTICAL IN: An optical digital audio input.
- UPGRADE MODE Switch: A toggle switch labeled 'ON | OFF' for firmware upgrades.
- bit Drive Logo: Indicates the proprietary technology used.
- Main Control Panel (Input Level Adjustments):
- POWER Indicator: An LED light indicating the unit's power status.
- DE-EQ CHECK Indicator: An LED light related to the De-Equalization function.
- High-Level Input Section (IN level 2-15 V): Features four rotary potentiometers with associated 'CLIP' indicators. These are for adjusting the input sensitivity for high-level (speaker level) signals, labeled 'L - FRONT - R' and 'L - REAR - R'.
- Low-Level Input Section (IN level 0.6-5 V): Contains two rotary potentiometers with 'CLIP' indicators, designed for adjusting the input sensitivity for low-level (RCA) AUX signals, labeled 'L - AUX - R'.
- Bottom Edge (Additional Controls & Inputs):
- SPEAKER TURN ON Switch: A toggle switch labeled 'OFF | ON' for controlling the speaker turn-on function.
- DE-EQ SET: A control or indicator related to the De-Equalization setup.
- UCS: A control or indicator, likely for Universal Control System.
- AUX IN: Left (L) and Right (R) RCA connectors for auxiliary low-level audio input.
5. Setup and Installation
5.1 System Requirements
Software Requirements
To configure the HERTZ H8 DSP, a personal computer with the following operating system is required:
- Microsoft Windows (32/64 bit): XP, Vista, Windows 7, Windows 8, Windows 10
5.2 Electrical Connections
Ensure the vehicle's battery is disconnected before making any connections.
Input Stage Connections
- High Level (Speaker): Connect the speaker outputs from your head unit or amplifier to the designated high-level inputs (FL - FR - RL - RR). The input level can be adjusted from 2-15 V using the potentiometers on the unit.
- Low Level (Pre): Connect RCA pre-out signals from your head unit to the low-level inputs.
- AUX IN: Connect external audio sources via the L/R RCA AUX IN ports. The input level can be adjusted from 0.6-5 V.
Output Stage Connections
- Low Level Pre (default): The H8 DSP provides 8 low-level RCA outputs (CH1-CH8) for connecting to external amplifiers. Default assignments include Front Tweeter L/R, Front Woofer L/R, Rear L/R, Subwoofer, and Center channel. These assignments are configurable via software.
Control Connections
- From / To Personal Computer: Use the 1 x USB / B port to connect the DSP to your computer for software configuration and tuning.
- DRC HE: Connect the Digital Remote Control (DRC HE) for audio controls and input selection.
- Optical / AUX Select: Use the Optical In / Aux wire control +12V / GND enable for input selection.
- Memory A / Memory B: Use the Memory A / B wire control +12V / GND enable to switch between stored audio presets.
5.3 Physical Installation
Select a secure, dry location within the vehicle that is away from direct heat sources and allows for adequate air circulation. Use the provided mounting hardware to firmly secure the H8 DSP unit. Avoid mounting in areas prone to excessive vibration or moisture.
6. Operation
6.1 Initial Power-Up
After all connections are made and verified, reconnect the vehicle's battery. The POWER indicator LED on the H8 DSP unit should illuminate, indicating successful power-up. If the LED does not light, refer to the Troubleshooting section.
6.2 Software Configuration
The HERTZ H8 DSP is primarily configured and tuned using dedicated PC software. Connect the DSP to your computer via the USB port. Install the HERTZ DSP control software (available from the manufacturer's website) and follow the on-screen instructions to access and adjust parameters such as:
- Equalization (parametric and graphic)
- Crossover settings (filter type, slope, frequency)
- Time alignment
- Input/Output routing
- Gain adjustments for individual channels
- De-Equalization (DE-EQ) to correct factory head unit processing
6.3 DRC HE Remote Control
If connected, the optional DRC HE remote control allows for convenient adjustments of key functions without needing the PC software. Functions typically include master volume control, input source selection, and switching between stored presets (Memory A/B).
7. Maintenance
7.1 Cleaning and Care
To maintain the performance and appearance of your H8 DSP, follow these guidelines:
- Wipe the unit with a soft, dry cloth.
- Do not use harsh chemicals, solvents, or abrasive cleaners.
- Ensure the unit remains free of dust and debris, especially around ventilation areas.
7.2 Firmware Updates
Periodically check the HERTZ official website for firmware updates. Updates may provide performance enhancements, bug fixes, or new features. Follow the instructions provided with the firmware update package, utilizing the 'UPGRADE MODE' switch on the unit.
8. Troubleshooting
If you encounter issues with your HERTZ H8 DSP, refer to the following common problems and solutions:
- No Power: Check the power and ground connections. Ensure the remote turn-on wire is receiving a +12V signal. Verify the vehicle's fuse.
- No Audio Output:
- Verify all input and output RCA cables are securely connected.
- Check input source selection (e.g., AUX, Optical) via software or DRC HE.
- Ensure gain levels are not set to minimum in the software.
- Confirm amplifiers connected to the DSP outputs are powered on and functioning.
- Distorted Audio / Clipping:
- Reduce input sensitivity using the potentiometers on the unit until the 'CLIP' indicator no longer illuminates.
- Lower the source unit's volume.
- Check for proper gain staging throughout the audio system.
- Cannot Connect to PC Software:
- Ensure the USB cable is securely connected to both the DSP and the computer.
- Verify that the correct USB drivers are installed on your computer.
- Try a different USB port or cable.
- Restart the computer and the DSP unit.
- Noise / Hiss:
- Check for proper grounding of all audio components.
- Ensure RCA cables are routed away from power cables to prevent interference.
- Adjust gain settings to optimize signal-to-noise ratio.
If the problem persists after attempting these solutions, contact HERTZ customer support or a qualified installer.
9. Specifications
Technical Data
- Input Stage High Level (Speaker): FL - FR - RL - RR AUX IN
- Output Stage Low Level (Pre): Front TW L/R, Front WF L/R, Rear L/R, Sub, Center
- Connections From / To Personal Computer: 1 x USB / B
- DRC HE: Audio controls and Memory / Inputs selection
- Optical / AUX Select: Optical In / Aux wire control +12V / GND enable
- Memory A / Memory B: Memory A / B wire control +12V / GND enable
- Software/PC Requirements: Microsoft Windows (32/64 bit): XP, Vista, Windows 7, Windows 8, Windows 10
- Dimensions (W x H x D): 191 x 34 x 131 mm / 7.51” x 1.33” x 4.76”
- Item Weight: Approximately 2.51 pounds
- Wattage: 120 watts (refer to specific power consumption, not audio output)
10. Warranty Information
The HERTZ H8 DSP Processor is covered by a manufacturer's warranty. Please refer to the warranty card included with your product or visit the official HERTZ website for detailed terms and conditions regarding warranty coverage, duration, and claims procedures. Keep your proof of purchase for warranty validation.
11. Customer Support
For technical assistance, product inquiries, or support, please contact HERTZ customer service through their official website or authorized distributors. Ensure you have your product model number (H8 DSP) and purchase details available when seeking support.