Manaz wrote:I used to recommend the Optima Yellow Tops, but they've gone downhill over the years.
My current battery is actually an NRMA one - 2254 Calcium. It seems to be doing OK.
Running a big sound system, you probably don't want to be saving weight on a battery. If it's a REALLY high powered system, you should be running capacitors to smooth the load out on the battery (car batteries hate short, sharp requirements for big power), and if you're running the audio system with the engine off, you want a decent amount of storage capacity - maybe even a second battery, or to do a battery relocation to the boot/rear.
Optima quality went South (Mexico) along with the manufacturing plant relocation.
I had a Red Top for 9 years, never ever let me down, not even once!