There are a couple ways to "push" a little more power out of an amp. Running a fan to get more air flowing on the heat sinks (fins) will allow things to go a little further before the current limit kicks in. Naturally the heaviest and shortest wire to the battery possible is best to minimize voltage drops. I once pulled apart an old Carver amp and added computer grade capacitors to the output rails, right where the final output transistors drew their power....more than four times the capacitance in total....to really let the output transistors get some power to the woofers.
