- The peak level will illuminate if the signal clips or distorts and the VU meter shows the input level in volume units.
- The mic/instrument volume is the gain. This can be decreased to avoid clipping. It can be turned up to obtain a better signal to noise ratio.
- The instrument volume is for a low impedance instrument such as guitar.
- The mode selector is used to select different taps / patterns / rhythms / types of delay / number or volume of repeats / combinations of playback heads.
- The bass and treble controls are used to modify the tone of the delay (not the dry signal). It is a shelving filter that adjusts the levels of low and high frequencies.
- The reverb/echo volume is the wet/dry effect mix. “Straight” gives no echo at all. This is the gain, and has a spring reverb unit.
- Repeat rate is the delay time / the amount of time between each repeat.
- Intensity is the feedback amount/number of repeats. This is the gain.
- The power switch should be used so that the unit should be switched off when not in use to preserve the life of the tape.
- Echo normal or footswitch works as a bypass (to switch off the machine).
- HML gives different output levels/volumes so that the unit can match the different signal levels required by different studio equipment.