Honda accord minor trouble starting?

I have a 06 honda accord 3.0 v6 vtec coupe (auto tranny). The last few weeks I have noticed a slight lag before it gets started. No bad sounds no grinding, clicking or anything out of the norm. Just the engine working to turn on. If I give it a rev wile I'm starting it will start up with no problem. About a month ago I also had a pretty hardcore audio system installed (speakers subs amps h-o deck) without adding a capacitor. Could my battery just need some more juice? Do I need a new battery? Is my starter starting to go? It has 78k miles and I haven't had this issue to recently. I also do bring my car to high rpm quite often.

Have or check the draw at the battery with the amp on and off. You must have 12 volts plus on a start. A load teat of the battery when fully charged will tell if the battery is the issue. Starter can be tested as well on a tester as it will read high voltage draw. The fuel pump could be going bad but if this starter issue started at the same point as the amp I would guess your amp needs to be powered from a fused source and Is directly powered from the battery. A relay installed in line could solve the issue. It could be installed under the hood near the battery and be tripped on only after engine is running.

High power stereo hunh… Check your battery. Capacitors do nothing to fix power deficiencies of stereo equipment since you can't get more power out than there's going in, so it's good you didn't waste money on one. Back to the issue; If your charging system can't keep up with the needs of the stereo, your battery will be left weak and there won't be enough power to blast the stereo plus run the engine.