Expert PX2R Double Limiter DSP User Manual

1. Product Overview

The Expert PX2R Double Limiter DSP is an advanced digital signal processor designed to provide comprehensive control over your audio system. It features a robust aluminum chassis and offers extensive tuning capabilities via Bluetooth connectivity.

Figure 1: Front view of the Expert PX2R Double Limiter DSP, showing the display and control knob.

Key Features:

• Two inputs and six independent outputs for versatile audio routing.
• Bluetooth control for seamless tuning via a dedicated application.
• RMS/Peak Limiter for signal protection.
• 28-band input EQ with 1/4 octave spacing.
• Parametric EQ with 3 independent bands per channel.
• Crossover with Butterworth, Linkwitz-Riley, and Bessel type filters (6 to 48dB/8 Degrees attenuation).
• Independent delay, mute, and gain control per channel.
• Polarity inversion and pink noise generator.
• Three 100% configurable memory presets.
• Durable aluminum chassis.

2. Setup and Installation

Proper installation is crucial for optimal performance. Ensure all connections are secure before powering on the device.

2.1 Connections

The PX2R features inputs and outputs on its rear panel for a clean installation, minimizing visible wiring.

Figure 2: Rear view of the Expert PX2R, highlighting the input and output connections.

• Input Connections: Connect your head unit's audio outputs to the two inputs on the PX2R.
• Output Connections: Connect the six independent outputs to your amplifiers. The PX2R supports up to three amplifiers.
• Power Connection: Connect the power input (10-15Vdc) to your vehicle's power supply. Ensure proper grounding.
• Antenna: The device includes an external antenna for Bluetooth connectivity.

2.2 Initial Bluetooth Pairing

To begin tuning, pair your mobile device with the PX2R via Bluetooth. Refer to the dedicated application for detailed pairing instructions.

3. Operating Instructions

The PX2R is primarily controlled via its dedicated mobile application, offering precise and convenient tuning.

3.1 Application Control

The mobile application provides a comprehensive interface for all DSP functions. This allows for detailed adjustments to each speaker from the comfort of your vehicle's cabin.

• Gain Adjustment: Adjust input and output gain levels. Note that some models may feature a physical gain knob for inputs.
• Equalization: Utilize the 28-band input EQ and 3-band parametric EQ per channel to fine-tune your audio frequencies.
• Crossover Settings: Configure crossover points and filter types (Butterworth, Linkwitz-Riley, Bessel) for optimal speaker integration.
• Time Alignment (Delay): Set independent delay for each channel to achieve precise sound staging.
• Limiter: Configure threshold, attack, and decay settings for the RMS/Peak Limiter to protect your speakers from over-excursion.
• Mute & Phase: Control individual channel mute and phase inversion.
• Presets: Save and recall up to three 100% configurable memory presets for different audio preferences or vehicle setups.

3.2 Physical Controls

While most adjustments are made via the app, the front panel provides basic navigation and display information.

• Control Knob: Navigate menus and adjust parameters shown on the display.
• Buttons: Access specific functions or navigate through settings.

4. Maintenance

To ensure the longevity and optimal performance of your Expert PX2R, follow these simple maintenance guidelines:

• Keep the device clean and free from dust and debris. Use a soft, dry cloth for cleaning.
• Avoid exposing the unit to extreme temperatures or moisture.
• Ensure proper ventilation around the unit to prevent overheating.

5. Troubleshooting

If you encounter issues with your PX2R, consult the following common troubleshooting steps:

• No Power: Check all power connections, including the main power (10-15Vdc) and ground. Verify the internal fuse (2 A) is intact.
• No Audio Output: Ensure all input and output RCA cables are securely connected. Verify channel routing in the application. Check mute settings for all channels.
• Bluetooth Connection Issues: Ensure the PX2R is within range of your mobile device. Restart both the PX2R and your mobile device. Re-attempt pairing.
• Distorted Sound: Check gain settings for both inputs and outputs in the application. Ensure no channels are clipping. Verify proper impedance matching with connected amplifiers.
• Buttons Unresponsive: If physical buttons are unresponsive, try resetting the device (refer to application for reset function).

6. Specifications

7. Warranty and Support

For warranty information and technical support, please refer to the official Expert Electronics website or contact your authorized dealer. Keep your proof of purchase for any warranty claims.