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.
Warnings. 1  Be extra careful when bridging a four-channel amp! 2  Test to see if your amp is already bridged by turning the amp on and measuring for voltage between the negative speaker output and, assuming you want to use it in your car, your car's ground.