Can I split the single pre-amp output from my head unit to drive two amplifiers with a Y-cable?
[This section was written by someone who wishes to remain anonymous, but I will field any questions on the subject -IDB] Yes. When two loads are connected in parallel (such as with a Y-cable) they get the same voltage as each other. They do NOT get the same voltage as if only one load was connected because the head-unit has an internal resistance (typically around 600 ohms). So, given that the amp has a typical input impedance of around 10k ohms then we get something like this: —————————– —————————- HEAD UNIT ________ | | AMP | ______| |_________Vamp___________ | | | R(head)| | | | | _ | __|__ |________| | | __|___ |__| – _ | / \ | | | | | -___|__ | Vi | | | |R(amp)| | _- | \_____/ | | |______| __| _- | |_______________________________|________| – | | | | —————————– —————————- for the single amp situation. Please realize that the R(head) and R(amp) are internal to the head unit and amplifier and in fact are not d
