Time to upgrade or no

Please explain; what is the power rating of the 2 channel amp and also the 7 channel. This info will help find a matching PC for each amp.

Audio. Amplifier Output Details. 140 Watt - 8 Ohm - at 1 kHz - THD 0.09% - 2 channels (main) 185 Watt - 4 Ohm - at 1 kHz - THD 0.09% - 2 channels (main) Response Bandwidth. 5 - 45000 Hz. Signal-To-Noise Ratio. 95 dB. Total Harmonic Distortion. 0.09 %

This is for the 2 and 7 channel

So, you don't have a mega-amp which needs a heavy gauge power cable. Your Pangea is 7-awg I believe. 10 or 12awg would be adequate for your amps as long as they are  low resistance. 14 gauge is typically used on source components since they have a low current draw.
 

I don’t need the best just something that’s going to work with what I have that Pangea is like a tow rope I think it’s 2 meters and really really heavy.i would like to either sell it and buy something else or move it to the 7 channel