By the way, I just checked in Deeco Farmers Plaza in Cubao. The thickest cable they have available is 12 AWG. The red/black wire costs P30/meter while the transparent wire costs P40/meter.
Since nandun na rin naman ako, I decided to buy the P30/meter red/black variety. I decided not to go to Raon anymore since medyo malayo. Medyo alanganin din kasi ang kalakaran dun (alam niyo naman na maraming kawatan sa lugar na yun). I think I might have saved P5/meter if I went to Raon but I didn't have the time anymore as I am working during the weekdays. Buying in Deeco is the best compromise I can do and probably the cheapest available in a store located in an airconditioned/mall environment.
Anyway, I have already replaced the cables for my rear speakers with the 12 gauge one. Sobrang kapal pala ng copper ng 12 AWG. Due to the very thick copper inside, I wasn't able to insert it to the speaker terminals (hindi magkasya sa sobrang kapal). I had to strip 1/3-1/4 of the copper just to make it fit into the terminals.
Overkill nga talaga ang 10 AWG since dun sa 12 AWG ay hindi na magkasya sa terminal. What more yung mas makalap na 10 AWG.
Given my 10m cable length requirement, 14 AWG would have sufficed. But the P5 difference between the P30/meter 12 AWG and P25/meter 14 AWG available in Deeco, I decided to just go with the thicker one.