Cambridge Audio CXA81 integrated amplifier

The Cambridge Audio CXA81 is an excellent match for a high quality stereo system. The extra large toroidal transformer means that it can deliver a lot of current to drive a somewhat more difficult loudspeaker.
This amplifier is based on its predecessor - the CXA80. The new model adds Bluetooth® with aptX® HD encoding for high quality music streaming from compatible devices

The CXA81 provides a convenient combination of analog and digital connections to your music sources. There are two Toslink optical digital inputs, a coaxial digital input and a USB port for connecting a computer. Analog components can be connected to one of the four unbalanced stereo RCA inputs or the balanced XLR input. There is also a subwoofer output.

80 watts x 2 channels into 8 ohms (120 watts x 2 channels into 4 ohms)
4-ohm capability allows use with a wide range of speakers
THD: 0.02% (20-20,000 Hz at 80% of rated power)
built-in high performance ESS Saber SE9016K2M DAC
toroidal power transformer for low noise and high current output
Bluetooth® wireless connectivity for streaming music from compatible smartphones, tablets, and computers
aptX® HD encoding provides high-quality music streaming from compatible devices
Class AB amplifier design
full-metal casework with thick, brushed aluminum front panel and acoustically damped chassis for enhanced resonance control
remote included
Connections:

two Toslink optical digital inputs
coaxial digital input
USB Type-B input for connecting a computer
four unbalanced stereo RCA inputs
balanced XLR left and right input
monaural RCA subwoofer output
stereo RCA preamp output
switchable A+B speaker outputs with binding-post connectors
control bus input and output
12-volt trigger input and output for automatic synchronized on/off with compatible Cambridge Audio components
IR input