1. Introduction
The EXPERT PX8.2 is a high-quality digital audio processor and crossover designed for automotive sound systems. It offers advanced sound tuning capabilities, allowing for precise control over your vehicle's audio environment. This manual provides essential information for the proper installation, operation, and maintenance of your PX8.2 unit.
The PX8.2 is available in two versions:
- Connect Version: Features RCA inputs for standard audio connections.
- Hi-Connect Version: Features wire inputs for high-level audio connections.
2. Safety Information
Please read and understand all safety instructions before installing and operating the EXPERT PX8.2. Failure to follow these guidelines may result in injury or damage to the device or vehicle.
- Always disconnect the vehicle's battery before performing any electrical work.
- Ensure all wiring is correctly connected and insulated to prevent short circuits.
- Mount the unit securely in a location that does not obstruct driving or interfere with vehicle safety systems.
- Avoid exposing the unit to excessive moisture, dust, or extreme temperatures.
- Do not attempt to open or repair the unit yourself. Refer all servicing to qualified personnel.
3. Product Overview
3.1. Features
- High Quality Digital Crossover
- Simplified and Accurate Commands
- Rotary Encoder for navigation
- 2 Inputs
- 8 Independent Outputs
- Channel Routing
- Input Equalizer with 15 Spacing Bands in 1/3 of an Octave
- Parametric Equalizer with 3 Independent Bands per Channel
- Independent Delay per Channel
- Automatic or Manual Limiter with Threshold, Attack, and Decay
- Polarity Reversal
- Input Gain adjustment
- Independent Mute per Channel
- Pink Noise Generator
- User Password protection
- Preset with All Settings (Pert)
- Independent Gain by Channel
- 300mA Remote Output
- Unbalanced Input
- 8 Customizable Channels
- Control via Tablet or Smartphone Application (Free APP available on Google Play Store or Apple Store)
3.2. Components and Connections
3.3. Version Differences: Inputs
4. Setup and Installation
4.1. Mounting the Unit
Choose a dry, well-ventilated location within your vehicle, away from direct heat sources or moving parts. Ensure the mounting surface is stable and secure. Use appropriate screws or fasteners to firmly attach the PX8.2 unit.
4.2. Wiring Connections
The PX8.2 requires power, ground, and remote turn-on connections, in addition to audio inputs and outputs.
- Power Connection: Connect the +12V terminal to a fused constant +12V power source from your vehicle's battery.
- Ground Connection: Connect the GND terminal to a solid chassis ground point in your vehicle.
- Remote Turn-On: Connect the REM IN terminal to your head unit's remote output. The REM OUT terminal provides a 300mA remote output for other devices.
- Audio Inputs:
- Connect Version: Use RCA cables to connect your head unit's audio outputs to the PX8.2's RCA inputs (IN-L, IN-R).
- Hi-Connect Version: Use speaker wire to connect your head unit's speaker outputs to the PX8.2's HI INPUT terminals.
- Audio Outputs: Connect the 8 independent RCA outputs (CH1-CH8) to your amplifiers or other audio components.
4.3. App Installation
To fully utilize the PX8.2's features, download the free control application from the Google Play Store (for Android devices) or the Apple App Store (for iOS devices). Follow the on-screen instructions to pair your smartphone or tablet with the PX8.2 via Bluetooth.
5. Operating Instructions
The EXPERT PX8.2 can be controlled via its front panel buttons and rotary encoder, or more comprehensively through its dedicated mobile application.
5.1. Front Panel Controls
The front panel features a display, a rotary encoder, and several buttons:
- Rotary Encoder (FUNC): Used for navigating menus and adjusting parameter values. Press to confirm selections.
- CH- / CH+: Navigate between channels.
- MUTE: Mutes the audio output.
- GAIN: Accesses gain settings.
- EQ IN: Toggles the equalizer on/off.
- PRST (Preset): Accesses and saves user presets.
- ESC: Exits the current menu or cancels an action.
5.2. Mobile Application Control
The mobile application provides a graphical interface for all PX8.2 functions, offering more intuitive and precise control.
- Bluetooth Connection: Ensure Bluetooth is enabled on your mobile device and the PX8.2. Open the app and select your PX8.2 unit to connect.
- Channel Routing: Assign input signals to desired output channels.
- Equalization: Adjust the 15-band input equalizer and 3-band parametric equalizer for each channel to fine-tune the sound.
- Delay: Set independent time delays for each channel to achieve optimal sound staging.
- Limiter: Configure the automatic or manual limiter with threshold, attack, and decay settings to protect your speakers.
- Polarity Reversal: Adjust the polarity of individual channels.
- Input/Channel Gain: Precisely control the input and individual channel gain levels.
- Pink Noise Generator: Use the built-in pink noise generator for system tuning and measurement.
- User Password: Set a password to protect your settings.
- Presets: Save and recall multiple custom audio settings.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the unit. Do not use harsh chemicals or abrasive cleaners.
- Connections: Periodically check all wiring connections to ensure they are secure and free from corrosion.
- Software Updates: Check the app store regularly for any available software or firmware updates for the PX8.2 to ensure optimal performance and access to new features.
7. Troubleshooting
If you encounter issues with your EXPERT PX8.2, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on | No power, blown fuse, faulty remote connection | Check +12V and GND connections. Verify the 2A fuse. Ensure REM IN receives a +12V signal from the head unit. |
| No audio output | Incorrect input/output connections, muted channels, incorrect gain settings | Verify all audio cables are correctly connected. Check if any channels are muted via the app or front panel. Adjust input and channel gain settings. |
| Distorted audio | Input signal too high, incorrect equalizer settings, faulty wiring | Reduce input gain. Reset equalizer settings to default or adjust carefully. Check audio cables for damage or loose connections. |
| Bluetooth connection issues | Bluetooth off, unit not in pairing mode, interference | Ensure Bluetooth is enabled on both devices. Restart the PX8.2 and your mobile device. Try pairing again. Move closer to the unit. |
8. Specifications
| Feature | Specification |
|---|---|
| Product SKU | 1466200 |
| Inputs | 2 (RCA for Connect, Wire for Hi-Connect) |
| Outputs | 8 Independent |
| Input Impedance | 47 KOhms |
| Output Impedance | 470 Ohms |
| Resolution | 24 Bits |
| Sampling Frequency | 48 KHz |
| Processing Latency | 1.08 ms |
| Response Frequency | 15 Hz to 22 KHz (-1dB) |
| THD + N Max | 0.01% |
| Signal to Noise Ratio | 100 dB |
| Operating Voltage | 10 to 15 VDC |
| Current Consumption | 300 mA (5W) |
| Fuse | 2A |
| Dimensions (HxWxL) | 30 x 250 x 120 mm (Approximate) |
| Control | Front panel, Smartphone/Tablet App (Bluetooth) |
9. User Tips
- App Control for Precision: While the front panel offers basic control, the mobile application provides a much more detailed and visual interface for fine-tuning your audio settings. It is highly recommended to use the app for initial setup and advanced adjustments.
- Start with Flat Settings: When tuning your system, begin with all equalizer and crossover settings flat or at their default positions. Make small, incremental adjustments and listen carefully to the changes.
- Systematic Tuning: Tune one aspect of your sound system at a time (e.g., set crossovers, then adjust equalization, then time alignment) to better understand the impact of each adjustment.
10. Warranty and Support
10.1. Warranty
The EXPERT PX8.2 Digital Audio Processor comes with a 1-year warranty from the date of purchase, covering manufacturing defects. Please retain your proof of purchase for warranty claims. The warranty does not cover damage caused by improper installation, misuse, accidents, or unauthorized modifications.
10.2. Technical Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact the seller or an authorized EXPERT Electronics service center. Refer to your purchase documentation for specific contact information.
