Introduction
This manual provides essential information for the safe and efficient operation of your Cambridge Audio CXA81 Integrated Stereo Amplifier. Please read these instructions carefully before use and retain them for future reference. The CXA81 is designed to deliver high-fidelity audio performance with versatile connectivity options.
Front view of the Cambridge Audio CXA81 amplifier, showcasing its minimalist design and central display.
What's in the Box
Upon unpacking your Cambridge Audio CXA81, please ensure all the following items are present:
- Power Cable
- 3 x AAA Batteries (for remote control)
- Remote Control
- Control Bus Cable
- Bluetooth Antenna
Setup
Placement
Place the CXA81 on a stable, level surface away from direct sunlight, heat sources, and excessive moisture. Ensure adequate ventilation around the unit to prevent overheating. Do not block any ventilation openings.
Connections
Follow these steps to connect your amplifier to other audio components:
- Power Connection: Connect the supplied power cable to the CXA81's power inlet and then to a suitable mains outlet.
- Speaker Connections: Connect your passive speakers to the Speaker A/B terminals on the rear panel. Ensure correct polarity (red to red / + to + and black to black / - to -) for optimal sound. The CXA81 supports two sets of speakers (A and B).
- Digital Inputs: Connect digital audio sources such as CD players, network streamers, or televisions using TOSLINK optical or Coaxial cables. For computer audio, use a USB Type-B cable to connect to the dedicated USB Audio input.
- Analog Inputs: Connect analog audio sources (e.g., a turntable with a built-in or external pre-amplifier, tape deck, or other line-level devices) to the RCA line-level inputs (A1, A2, A3, A4). For high-end audio sources, utilize the balanced XLR input for reduced interference.
- Bluetooth Antenna: Screw the provided Bluetooth antenna onto the designated connector on the rear panel for stable wireless connectivity.
- Subwoofer Output: If using an active subwoofer, connect it to the 'Sub Out' RCA connector.
- Pre-out: The 'Pre Out' RCA connectors allow you to connect the CXA81 to a separate power amplifier if desired.
Hands connecting various audio cables to the rear panel of the Cambridge Audio CXA81 amplifier, illustrating the connection process.
Operating Instructions
Power On/Off
Press the power button on the front panel or the remote control to turn the unit on or off. The power indicator will illuminate when the unit is active.
Source Selection
Use the input selector buttons on the front panel or the remote control to cycle through and choose your desired audio source (e.g., USB, Bluetooth, Optical 1, Optical 2, Coaxial, A1, A2, A3, A4, XLR).
Volume Control
Adjust the audio output level using the large rotary volume knob on the front panel or the volume up/down buttons on the remote control. Rotate clockwise to increase volume, counter-clockwise to decrease.
Bluetooth Pairing
To pair a Bluetooth device, select the Bluetooth input on the CXA81. The amplifier will automatically enter pairing mode. On your mobile device, search for 'Cambridge Audio CXA81' in the Bluetooth settings and connect. The CXA81 supports aptX HD for high-quality wireless audio streaming.
DAC Functionality
When using any of the digital inputs (USB, Optical, Coaxial), the integrated ESS Sabre ES9016K2M Digital-to-Analog Converter (DAC) will process the audio signal, ensuring high-resolution sound reproduction.
Speaker A/B Selection
If you have connected two sets of speakers, use the Speaker A/B selector button on the front panel to choose which set is active, or to play through both simultaneously.
Headphone Output
Connect headphones to the 3.5mm jack on the front panel. Connecting headphones will mute the main speaker outputs.
The Cambridge Audio CXA81 amplifier displayed with its remote control, illustrating user interaction.
Maintenance
Proper maintenance ensures the longevity and optimal performance of your CXA81 amplifier.
- Cleaning: Disconnect the unit from the mains power supply before cleaning. Wipe the exterior surfaces with a soft, dry, lint-free cloth. Do not use abrasive cleaners, waxes, or solvents, as these can damage the finish.
- Ventilation: Regularly check that the ventilation openings on the top and sides of the unit are clear of dust and obstructions. Adequate airflow is crucial to prevent overheating.
- Power Disconnection: If the unit will be left unused for an extended period, disconnect it from the mains power supply.
Troubleshooting
If you encounter issues with your CXA81, refer to the following common problems and solutions:
| Problem | Possible Cause / Solution |
|---|---|
| No power |
|
| No sound output |
|
| Distorted sound |
|
| Bluetooth connection issues |
|
| Remote control not working |
|
Specifications
Detailed technical specifications for the Cambridge Audio CXA81 Integrated Stereo Amplifier:
- Output Power: 80 Watts RMS per channel into 8 Ohms (Class AB)
- Channels: 2
- DAC: ESS Sabre ES9016K2M (supports up to 32-bit/384kHz PCM and DSD 256)
- Digital Inputs: 1 x S/PDIF Coaxial, 2 x TOSLINK Optical, 1 x USB Audio (Type-B)
- Analog Inputs: 4 x RCA (line-level), 1 x Balanced XLR
- Wireless Connectivity: Bluetooth aptX HD (integrated)
- Outputs: Speaker A/B terminals, 3.5mm Headphone, Pre-out (RCA), Subwoofer output (RCA)
- Dimensions (LxWxH): 34.1 x 43 x 11.5 cm (13.4 x 16.9 x 4.5 inches)
- Weight: Approximately 8.7 kg (19.2 lbs)
- Components Included: Power Cable, 3 x AAA batteries, Remote Control, Control Bus Cable, Bluetooth antenna
- Country of Origin: China
- Certifications: CE, TUV
Front view of the Cambridge Audio CXA81 amplifier, with icons indicating USB, Bluetooth aptX HD, ESS Sabre DAC, and A/B speaker zones.
Warranty and Support
For detailed warranty information, technical support, and service inquiries, please refer to the official Cambridge Audio website or contact your authorized local dealer. You can find more information and support resources at the Cambridge Audio Store.
