Introduction
The OSD MX880 GEN2 is a high-performance, multi-channel Class D amplifier designed to deliver reliable power for distributed audio systems in both residential and commercial environments. This amplifier provides 8 channels of amplification, configurable into 4 zones, offering flexible audio distribution solutions. Its efficient Class D design ensures low distortion and high power output while maintaining a compact form factor.
Figure 1: Front and rear view of the OSD MX880 GEN2 Multi-Zone Amplifier, showcasing its compact design and comprehensive connectivity options.
Safety Information
Please read and understand all safety instructions before operating this amplifier. Retain this manual for future reference.
- Power Source: Connect the amplifier only to the type of power source indicated on the marking label.
- Ventilation: Ensure proper ventilation. Do not block ventilation openings. Install in accordance with the manufacturer's instructions.
- Water and Moisture: Do not expose this appliance to rain or moisture. Do not place objects filled with liquids, such as vases, on the apparatus.
- Heat: Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Grounding: This appliance must be grounded.
- Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
Key Features
- High-Performance Amplification: Delivers 80 Watts per channel (1KHz into 4 Ohms) and 50 Watts per channel (1KHz into 8 Ohms) for high-resolution audio.
- Class D Efficiency: Utilizes Class D amplifier technology for low distortion, high efficiency, and reduced heat generation.
- Multi-Zone Capability: Supports up to four independent audio zones, ideal for distributed audio systems.
- Flexible Configuration: Can be used as a main amplifier for audio distribution or integrated into 5.1 or 7.2 home theater systems.
- Protection Circuitry: Features special protection circuitry to safeguard against thermal overload and short circuits.
- Front Panel Controls: Direct On/Off zone control buttons on the front panel for convenient operation.
- Compact Design: Slim 2U rack-mountable form factor (hardware included) for easy integration into AV racks.
Package Contents
Verify that all items are present in the package:
- OSD MX880 GEN2 Multi-Zone Amplifier
- Power Cord
- Rack Mount Hardware
- Quick Start Guide
Setup
1. Physical Placement and Rack Mounting
Place the amplifier in a location with adequate ventilation. If rack mounting, use the included hardware to secure the amplifier in a standard 19-inch audio rack. Ensure there is sufficient space around the unit for airflow to prevent overheating.
2. Speaker Connections
The MX880 GEN2 features phoenix connectors for speaker outputs. Each zone has dedicated left and right speaker terminals. Ensure correct polarity (+ to + and – to –) when connecting speakers. The amplifier supports both 4-ohm and 8-ohm speakers.
Figure 2: Detailed view of Zone 2 connections on the rear panel, including Line In/Out, Trigger, Bus In, Volume controls, Stereo/Bridge switch, and speaker terminals.
Figure 3: Detailed view of the Bus inputs and Zone 4 connections on the rear panel, illustrating the flexibility for system integration.
3. Audio Input Connections
Connect your audio sources (e.g., pre-amplifier, media player) to the amplifier's inputs. The MX880 GEN2 offers multiple input options:
- Line In (RCA): Each zone has a dedicated stereo RCA input.
- Bus In (RCA): Two global stereo RCA bus inputs (Bus In 1, Bus In 2) allow a single source to be distributed to multiple zones.
- Input Selection Switch: Each zone has a switch to select between its dedicated Line In, Bus In 1, or Bus In 2.
4. Trigger Connections (Optional)
The amplifier includes 12V trigger inputs and outputs for integration with other audio components. Connect a 12V trigger source to the 'Trigger In' to automatically power on/off the amplifier. Use 'Trigger Out' to control other devices.
5. Power Connection
Once all audio and speaker connections are made, connect the supplied power cord to the amplifier's AC inlet and then to a suitable power outlet. Ensure the voltage selector switch (if present) is set correctly for your region (AC 115V or AC 230V).
Operating Instructions
1. Powering On/Off
Press the main power button on the front panel to turn the amplifier on or off. The power indicator LED will illuminate when the unit is powered on.
2. Zone Control
Each of the four zones has a dedicated On/Off button on the front panel. Press the corresponding button to activate or deactivate a zone. The zone indicator LED will light up when the zone is active.
3. Volume Adjustment
Each zone has individual volume adjustment controls located on the rear panel. Use a small screwdriver to adjust the 'Vol.Right' and 'Vol.Left' potentiometers for each zone to set the desired maximum volume level. Fine-tune volume from your audio source.
4. Input Source Selection
On the rear panel, next to the RCA inputs for each zone, there is a slide switch to select the audio input source for that specific zone: 'Line In', 'Bus In 1', or 'Bus In 2'.
5. Stereo/Bridge Mode
Each zone can operate in stereo or bridged mono mode. The 'Stereo/Bridge' switch on the rear panel allows you to select the mode. In bridged mode, the two channels of a zone combine to provide higher power output to a single speaker (typically 8-ohm). Ensure correct speaker wiring when using bridged mode.
Video 1: An overview of OSD Audio's Multi-Channel Amplifiers, including the MX series, highlighting their features and applications in distributed audio systems.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Do not use liquid cleaners or aerosol sprays.
- Ventilation: Regularly check that the ventilation openings are clear of dust and debris to ensure proper airflow and prevent overheating.
- Power Cord: Inspect the power cord periodically for any damage. If damaged, replace it with an appropriate cord.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord disconnected; Power outlet faulty; Amplifier protection mode activated. | Check power cord connection; Test power outlet; Disconnect power for 5 minutes and reconnect. |
| No sound from a zone | Zone not activated; Incorrect input selected; Speaker wires disconnected/faulty; Source device not playing. | Press zone On/Off button; Verify input selection switch; Check speaker connections; Ensure audio source is active. |
| Distorted sound | Volume too high (source or amplifier); Incorrect speaker impedance; Faulty cables. | Reduce volume levels; Ensure speakers match amplifier impedance (4 or 8 ohms); Check and replace cables if necessary. |
| Humming or buzzing noise | Ground loop; Loose connections; Interference from other electronics. | Ensure all components are on the same electrical circuit; Check all audio cable connections; Move amplifier away from other electronic devices. |
| Amplifier overheats and shuts down | Insufficient ventilation; Overloaded speakers (too low impedance); Short circuit in speaker wiring. | Ensure clear ventilation; Check speaker impedance; Inspect speaker wiring for shorts. Allow unit to cool before restarting. |
Specifications
| Specification | Detail |
|---|---|
| Model Number | MX880 GEN2 |
| Brand | OSD Audio |
| Number of Channels | 8 (4 stereo zones) |
| Output Power (1KHz, 4 Ohms) | 80 Watts per channel |
| Output Power (1KHz, 8 Ohms) | 50 Watts per channel |
| Amplifier Type | Class D |
| Item Dimensions (L x W x H) | 16.81 x 16.41 x 3.46 inches |
| Item Weight | 19 pounds |
| Voltage | 12 Volts (DC Trigger) |
| Mounting Type | Rack Mount |
| UPC | 810281011264 |
Warranty
OSD Audio products are designed and manufactured to the highest quality standards. For specific warranty details and terms, please refer to the warranty information provided with your purchase or visit the official OSD Audio website. Keep your proof of purchase for any warranty claims.
Support
If you encounter any issues or have questions regarding your OSD MX880 GEN2 Multi-Zone Amplifier that are not covered in this manual, please contact OSD Audio customer support. You can find contact information on the official OSD Audio website or through your retailer.
For additional resources and product information, visit the OSD Audio Store on Amazon.
