**iFi Sigwave** - comes from signal waveform

**iFi RepO:Si** - comes from reducing power of signal

**iFi RePoSi** - comes from reducing power of signal

**iFi RePo** - comes from reducing power of signal

**iFi RPSi** - comes from reducing power of signal

**iFi WiDiWa** - comes from without distorting waveform