1. Introduction
The Crown XLi800 is a two-channel power amplifier designed for reliable and high-quality audio amplification. It is suitable for various professional audio applications, including use by musicians, DJs, entertainers, and in public address systems. This manual provides essential information for the proper setup, operation, and maintenance of your XLi800 amplifier.
The XLi Series, built on decades of experience in amplifier technology, offers robust performance with features designed for versatility and durability. This model delivers 300W into 4 Ohms (dual channel), 200W into 8 Ohms (dual channel), and 600W into 8 Ohms (bridged mono).
2. Key Features
- Two-channel power amplifier with stereo, parallel, and bridge-mono modes.
- Output Power: 300W into 4 Ohms (Dual), 200W into 8 Ohms (Dual), 600W into 8 Ohms (Bridged).
- User-selectable input sensitivity: 0.775V or 1.4V.
- Electronically balanced RCA and XLR inputs for versatile connectivity.
- Speakon® and binding post outputs for various speaker connections.
- Efficient forced-air cooling system to prevent excessive thermal buildup.
- Advanced protection circuitry against shorts, no-load conditions, on/off thumps, and radio-frequency interference.
- Front panel controls: Two level controls, power switch, power LED, and six LEDs (signal presence, clip, and fault for each channel) for easy monitoring.
- Durable construction for long-lasting performance.
3. Specifications
| Specification | Value |
|---|---|
| Model Number | XLi800 |
| Brand | Crown |
| Number of Channels | 2 |
| Output Power (8 Ohm Dual) | 200 Watts per channel |
| Output Power (4 Ohm Dual) | 300 Watts per channel |
| Output Power (8 Ohm Bridged) | 600 Watts |
| Input Sensitivity | 0.775V or 1.4V (selectable) |
| Inputs | RCA, XLR |
| Outputs | Speakon®, Binding Post |
| Cooling | Forced-air cooling |
| Dimensions (L x W x H) | 12.4 x 19 x 3.5 inches |
| Item Weight | 25.1 pounds |
| Voltage | 240 Volts |
| Material | Copper |
4. Setup
4.1 Unpacking and Placement
Carefully remove the amplifier from its packaging. Place the amplifier in a well-ventilated area, ensuring adequate airflow around the unit. The XLi800 is designed for rack mounting (19-inch standard rack).
4.2 Rear Panel Connections
The rear panel of the XLi800 provides all necessary input and output connections. Refer to the image below for a visual guide.
4.2.1 Input Connections
- XLR Inputs: Use balanced XLR cables to connect your audio source (mixer, preamplifier) to the amplifier's Channel 1 and Channel 2 XLR inputs.
- RCA Inputs: Alternatively, use unbalanced RCA cables to connect your audio source to the amplifier's RCA inputs.
- Input Sensitivity Switch: Select the appropriate input sensitivity (0.775V or 1.4V) based on the output level of your audio source. For most home audio equipment, 0.775V is common, while professional gear often uses 1.4V.
4.2.2 Output Connections
- Speakon® Outputs: Connect your speakers using Speakon cables to the Speakon output connectors for secure and reliable connections.
- Binding Post Outputs: Connect your speakers using bare wire or banana plugs to the binding post outputs. Ensure correct polarity (+ to + and - to -).
4.3 Operating Modes
The XLi800 supports three operating modes, selectable via switches on the rear panel:
- Stereo Mode: Each channel operates independently, providing separate left and right audio signals to two speakers.
- Parallel Mode: Both input channels are combined, and the signal is sent to both output channels. This is useful for driving multiple speakers with a mono signal.
- Bridge-Mono Mode: Both amplifier channels are combined to deliver maximum power to a single speaker. Ensure the connected speaker is rated for the higher power output and impedance (8 Ohms for XLi800).
5. Operating Instructions
5.1 Front Panel Controls and Indicators
The front panel provides access to essential controls and visual indicators for monitoring amplifier status. Refer to the image below for a visual guide.
- Power Switch: Toggles the amplifier on/off.
- Power LED: Illuminates when the amplifier is powered on.
- Level Controls: Independent rotary controls for adjusting the output level of Channel 1 and Channel 2.
- Signal Presence LEDs: Indicate the presence of an audio signal on each channel.
- Clip LEDs: Illuminate when the output signal is clipping, indicating potential distortion. Reduce the input level or output gain if these LEDs light up frequently.
- Fault LEDs: Indicate a fault condition in the amplifier, such as overheating or short circuits. If a fault occurs, the amplifier may enter protection mode.
5.2 Powering On and Initial Adjustment
- Ensure all connections (inputs, outputs, power) are secure.
- Turn the level controls for both channels to their minimum (fully counter-clockwise) position.
- Power on your audio source equipment first.
- Flip the power switch on the XLi800 amplifier to the 'ON' position. The Power LED should illuminate.
- Slowly increase the level controls on the amplifier to achieve the desired output volume. Monitor the Signal Presence and Clip LEDs.
6. Maintenance
- Cleaning: Regularly clean the exterior of the amplifier with a soft, dry cloth. Ensure ventilation grilles are free from dust and debris to maintain proper airflow for the forced-air cooling system.
- Ventilation: Always ensure the amplifier has adequate ventilation. Do not block the air vents.
- Cable Inspection: Periodically inspect all audio and power cables for any signs of wear or damage. Replace damaged cables immediately.
- Storage: If storing the amplifier for an extended period, ensure it is kept in a dry, dust-free environment.
7. Troubleshooting
The XLi800 amplifier incorporates advanced protection circuitry to ensure reliable operation. If you encounter issues, consider the following:
- No Sound Output:
- Check all cable connections (inputs, outputs, power).
- Ensure the amplifier is powered on (Power LED illuminated).
- Verify that the audio source is active and sending a signal (Signal Presence LEDs should flicker).
- Check the amplifier's level controls are not at minimum.
- Confirm the correct operating mode (Stereo, Parallel, Bridge-Mono) is selected.
- Distorted Sound (Clip LED On):
- Reduce the input level from your audio source.
- Lower the amplifier's level controls.
- Ensure speakers are correctly matched to the amplifier's impedance.
- Amplifier Shuts Down (Fault LED On):
- This indicates a protection mode activation (e.g., overheating, short circuit).
- Turn off the amplifier and allow it to cool down.
- Check speaker cables for shorts or damage.
- Ensure proper ventilation around the amplifier.
- Unwanted Noise/Interference:
- Ensure all cables are properly shielded and connected.
- Check for ground loops.
- Verify that the amplifier's protection against radio-frequency interference is functioning.
8. Warranty and Support
A Manufacturers Limited Product Warranty applies to Crown Audio products only when the purchase is made from Crown Audio Authorized North American Dealers. For complete details regarding warranty coverage and terms, please refer to the official Crown Audio website or contact an authorized dealer.
For technical support, service, or further inquiries, please contact your authorized Crown Audio dealer or visit the official Crown Audio support channels.
