ESU LokSound V4.0 21MTC heeft 4 versterkte uitgangen met kortsluitbescherming volgens ESU.
21MTC Pinout Variances Both ESU and TCS agree the primary concern is with the implementaion of AUX3 and AUX4. ESU has implemented these as Logic Level Outputs. Soundtraxx will be releasing a new model in August 2015 and has implemented these as Full Power "Amplified" Outputs.TCS has implemented these as Full Power "Amplified" Outputs on the steam models and Logic Level Outputs on the diesel models.Zimo has created the C version of decoder that has Logic Level Outputs and the D version that has Full Power "Amplified" Outputs to satisfy either standard and is probably not too concerned about the matter at this point.