While this receiver predates modern HDMI standards, it offers extensive analog and early digital connectivity:
The Harman Kardon AVR 51 is a 5.1-channel A/V receiver. It was a fully featured unit for its time, offering a variety of input and output options to build a complete home theater system.
A key feature highlighted in the manual is the configuration of the "High-Current, Ultrawide-bandwidth Amplifier." Harman Kardon was famous for its power supply designs, and the manual takes great care to explain the benefits of high instantaneous current capability. By educating the user on the technical rationale behind the design, the manual transforms the user from a passive operator into an informed participant. Furthermore, the section regarding the installation of the "EzSet" remote or manual speaker calibration is critical. Without following the specific procedures outlined in revision 1.3.4, a user could easily misalign channel levels, resulting in a disjointed surround sound experience. The manual serves as the fail-safe against user error in a pre-auto-calibration era. harman kardon avr 51 user manual 134 upd
: Offers digital versions of user-facing instructions and remote programming.
Check the rear panel jumpers; the "Pre-Out" and "Main-In" loops must be connected if you are not using an external amplifier. While this receiver predates modern HDMI standards, it
Access menus via the remote for easy setup. Multi-Room Control: Provides audio to a second zone. Programmable Remote: Can control TVs, VCRs, and CD players. Troubleshooting No Sound: Check the "Speaker" button on the front panel.
The AVR 51 supports various surround sound modes: By educating the user on the technical rationale
The Harman Kardon AVR 51 is backed by a 5-year limited warranty that covers parts and labor.
The AVR 51 is a legacy model. Technical information is largely found in service and repair documents.