The audio performance, respectively the maximum output voltage swing depends on the batterie voltage which drops down during it's life-time. This is not the case when using an external electronically stabilized voltage supply. Using a 9V or rather 8.4V accumulator results in short service. Both input channels use RF Phono jacks recommended for semi permanent connections in audio applications. LINE OUT unbalanced line level signals via RF Phono jacks.
Output is short circuit protected and can drive long cables.
Powers the unit when the switch is moved from the marked OFF-position. Bias Supply Coding Sits inside of the chassis. One bridge per channel. Open the battery compartment by removing the covering plate. Disconnect the battery.