SP-28

Audio selector SP 28 is designed for specific sound reinforcement applications, fixed installations and recording studios. A stereo audio input signal can be selected and patched to four stereo outputs, with the facility to inhibit the previous output and replace it with the newly selected one by activating the "priority" function. The inputs (20KOhm) and outputs (600 Ohm) are balanced and are equipped with individual ground lift switches to eliminate earth loops, which constitute a potential source of hum.

Front panel:

4 rotary potentiometers separately adjusting the output level of the 4 stereo systems (Left and Right). 4 push-buttons, without detent, that activate (LED on) the relevant outputs of the 4 stereo systems (Left and right). 1 “Priority” push-button, with detent, to activate the output of the selected system while excluding the previous one. 1 “Left” push-button, with detent, activating all the outputs associated with the left channel. 1 “Right” push-button, with detent, activating all the outputs associated with the right channel. “Power” switch.

Rear panel:

1 connector to link the external power unit (supplied). 2 electronically balanced inputs of the Left and Right channels (XLR-M Neutrik). 8 electronically balanced outputs of the 4 stereo systems (XLR-F Neutrik). All the inputs and outputs with the Ground-Lift switch