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Whirlwind SP1X2 and SP1X3 Mic Splitters
These are the single channel mic splitters that get used one at a time, when a broadcast truck or a recording rig needs a channel and the house console has to keep it. The SP1X2 gives one direct output and one transformer isolated output; the SP1X3 gives one direct and two isolated.
Every transformer isolated output has its own ground lift switch, which is how you kill the buzz that appears the moment two systems on different grounds share a microphone. For line level rather than mic level work, the SP1X3LL covers the same job.
| Type | Single channel passive microphone splitter |
|---|---|
| SP1X2 outputs | One direct, one transformer isolated |
| SP1X3 outputs | One direct, two transformer isolated |
| Ground lift | One switch per isolated output |
| Operating level | -0.5 dB to +4 dB |
| Frequency response | 20 Hz - 20 kHz, +/-0.63 dB |
| Maximum input level | -0.5 dBu |













