Larson Electronics - Explosion Proof Switch w/ Potentiometer - C1D1, C2D1 - 1-10K Ohms - Rotary Dial - Double Gang Box,Hi/Lo Converter 4-Channel with Speaker Emulator (Remote out),2-Channel Lossless Audio High To Low Level Converter with Auto Turn-On And Speaker Emulator,KBWC-28 | KB Electronics Solid State Variable Speed AC Electric Motor Control 8.0 Max amps 230V,Hi/Lo Converter 2-Channel with Speaker Emulator (Remote out)