: The Test Tone Selector allows you to balance volume levels across all five channels manually, ensuring a centered sweet spot.
The Harman Kardon AVR 51 is a 7.1-channel audio/video receiver that supports a wide range of audio and video formats, including Dolby Digital, DTS, and HDMI. The receiver features a robust power amplifier, capable of delivering 100 watts per channel, and a sophisticated surround sound processor. The AVR 51 also includes a range of connectivity options, such as four HDMI inputs, two component video inputs, and a range of analog and digital audio inputs. harman kardon avr 51 user manual 134 upd