Source: Corporate website, Last Accessed: 2021/05/26

The MB20 Bluetooth Transceiver is an easy and simple solution to add Bluetooth streaming capabilities to virtually any McIntosh (or non-McIntosh) home audio system of any era, as it is a small (its footprint not much bigger than a smartphone), stand-alone, complete Bluetooth streaming solution that does not require any third-party apps to use.
As a transmitter/receiver, the MB20 has been engineered as a Class 1 Bluetooth device. Class 1 devices can typically operate at a range of up to 150 feet (45.7 meters) in ideal conditions with limited obstructions. As a Receiver, the MB20 employs an extremely sensitive circuit for better reception, even from Class 2 devices, with the maximum range determined by the capabilities of both actively paired devices. An external antenna helps maximize its range for better performance. As a Transmitter, it has a range 10x greater than that of a typical Class 2 Bluetooth device.
The compact MB20 comes with a variety of analog and digital inputs and outputs to connect it to your home audio system – most notably among them being balanced inputs and outputs. For connecting it to your system via analog cables, it includes one stereo set of both balanced and unbalanced inputs, along with a stereo set of balanced and unbalanced outputs. For digitally connecting it to your system, such as for use with an outboard DAC, it has one each of both coaxial and optical inputs and outputs.
The MB20 uses Bluetooth 5.0 with support for both the high bitrate Advanced Audio Coding (AAC) standard as well as Qualcomm aptX HD for hi-res audio playback. It also features Qualcomm aptX Low Latency for improved audio transmission speed to deliver sound in sync with applicable visual media. When used as a Receiver, the MB20 uses a high-performance 32-bit DAC with 192kHz internal processing for optimum sound quality; when used in combination with a separate outboard DAC, the MB20's digital output is fixed at 96kHz to be compatible with most third-party DACs , to maximize performance and maintain audio signal integrity. When in Transmitter mode, it uses an equally capable high-performance ADC with 110dB Signal-to-Noise Ratio.
As a transceiver, the MB20 can function as either a Bluetooth Receiver or Transmitter (but not both at the same time). Simply set the switch on the back panel to the proper setting for the desired Receiver or Transmitter usage.

For more information: https://www.mcintoshlabs.com/

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