R6 Fortune

ive got a sub+amp+power cap fitted and I was told not to buy too high amperage battery as it could burn all wires as well. Dont remember exactly, but thats what i was explained. Unless its wrong??

Morning! driving 1994 st202 (ss-II) for about 3 months and just got couple probs. yesterday when i started the car, all the lights on dashboard stayed on even if driving (oil, battery, headlights, engine and another the red one). left at diagnostics today & got no ideas what it could be... checked oil level and coolant, everything seems to be fine. any ideas? Thanks.