1. Input Level Control: Allows adjustment of the level of the signal going into the unit. For best signal to noise ratio, adjust this control until the Peak LED (#2) flashes on strong signal peaks. The center detent position is "unity gain."

2. Peak LED: Lights when the input signal is within 6dB of clipping.

3, 4. Space and Center Controls: When using the unit in the "3D mode", these controls allow variations of the sound enhancement. The Space control adjusts the level of the "3D portion" of the sound, the Center control adjusts the level of the "central portion" of the sound. (Please see the Introduction on page 3.) A good starting position for both controls is at 12:00 (center detent) – from there, experimentation with these controls will produce the best results. Note: These controls are inactive when using the unit in mono mode (refer to #5).

5. Stereo/Mono Switch and LEDs: Set this switch to match the input signal: when converting a mono signal to stereo, set the switch to MONO (switch in, green LED lit); when enhancing a stereo signal, set the switch to STEREO (switch out, red LED lit).

6. Active Switch and LED: The unit will only affect the signal when this switch is in – the adjacent LED will light when active. This is useful when comparing the processed signal (switch in) to the original signal (switch out). Note: The output level of the unit may be affected by the settings of the Space and Center controls. This should be kept in mind when comparing the original signal with the processed signal.

7. Power Supply Jack: Plug the small metal barrel connector of the AC power adapter here.

8. Cord Cinch: Use this clip to secure the cable of the power pack to the chassis of the SM2-SRS.

9. Output Jacks: These balanced 1/4" jacks* carry the left and right output signals from the SM2-SRS to their destinations.

10. Input Jacks: These balanced 1/4" jacks* receive the input signal(s) into the SM2-SRS. When using a mono input signal, either jack may be used as the input.