This is a special version of the FS 41501 with balanced input and output.
- Shift frequency continuously adjustable from 1 to 10Hz.
- Increase of 6-8 dB in the stability margin, depending on environmental conditions.
- BYPASS switch (hard-wire bypass).
- INCREASE / DECREASE frequency shift switch.
- XLR input and output connectors duplicated on jack connectors.
- Delayed insertion at switch-on.
- Fast start of operation.