I Have 2 Kickers, 12" in box, When very low bass occurs, the frequency seams to make the electronic throtttle cut out...get a loss of power and can feel it in gas pedal,only at low bess frequencies... any one else have this issue?
Id still recommend a cap, still leaning to a current draw issue. You can get them online pretty cheap, and if you go no name brand, make sure its at least rated at 1 farad. I'm sorry I couldn't be more help, but IV seen amps cause some funky stuff over the years.
Week old thread, but I'd just like to say I consider caps to be more like a band aid than a fix. The OP should find the cause of the problem and properly resolve it.
I don't think the amp draw of one 300 watt amplifier would cause driveability issues. I suspect a wiring issue somewhere that may or may not be related to the amplifier. If the amp draw of the amplifier were in fact the cause, then an upgraded alternator and upgraded alternator/battery wiring would be the best resolve, benefitting the entire car.
My suggestion would be upgrade your alternator or atleast check it to make sure its drawing the proper amperage. A 300w amp should not draw that much and interfere with your throttle. And like the others have said a cap is always nice with any system big or small, its like a warranty you may never need it but if you do you know your covered. I hope you figure this out