The finger-to-nose test is not a standardized field sobriety test recognized by the National Highway Transportation Safety Administration (NHTSA). Because the NHTSA does not endorse the finger-to-nose test as a reliable indicator of mental and physical impairment, it holds less weight in court than a standardized test.
a channel is a output from the amp to the speakers or subs. if you have a 2 channel amp there is 2 outputs on the amp if you have a 4 channel amp there are 4 outputs this goes for all the amps whither it is a 1 channel,2channel 4channel or 5 channel. channel= output.
There are some amplifiers which use the same transistor(s) to drive both the positive and the negative halves of the waveform. NOTE: Amplifiers in classes A, B, and AB operate their output transistors in a 'linear' mode. Class 'D' amplifiers operate their outputs in 'switch' mode.