how to modify the amplifiers of the mono into stereo

You need two mono amps circuit.In fact, a series of separate TSB.Inputs (sound source) is also generally 2 (stereo / R + L) example of vcd / dvd No red and white jacks (yellow for images).,Or more simply, you buy another mono amps 1 + trafonya. Red jack cable in amps No. 1 and the cable jack on the amp white no 2.Because assemblies amplinya alone then need two pieces of main speakers connected to each amp output.,Nach if want to be first place (not combined) that is the only source of current (power supply / power supply) is from one transformer.That way you do not need a transformer and power supply circuit again.If you want to add to the potentiometer "balance" then after foot No. 2 volume potentiometer is connected to the edge leg balance potentiometer (eg R on the right and L dikiri) middle leg in tandem with 0v / neutral.So later on mounting potentiometer barriers only balance if you want to add to the potentiometer TSB.To use the potentiometer Volume / Bass / Treeble if would be made in one piece potentiometer on each function then you must buy 3 pieces of stereo potentiometer. To pair off and in order, and put it on the front foot / back of each series amps TSB. Suppose amps to-1 potentiometer mounted on the foot and forefoot all amps 2nd leg potentiometer mounted on the back foot all.

Stereo amplifier is 2 mono amplifiers are packaged in a single container. every not interconnected employment but only on the balance.
So two mono amplifier is not merged, but masing2 given the stereo input signal (usually marked with L and R -> Left and Right)
If the stereo amplifier with a mono bijsa in jadiin BRIDGE way, but,,, if mono amplifier can not in making stereo.
The only way to use 2 KITs yes mono amplifier.