Quote Originally Posted by I800C0LLECT View Post
Key words...."number of reasons"

Tweeters will never be able to handle the power a subwoofer can. My home theatre sub only utilizes about 35watts @ 8ohms. Majority of mainstream subs are designed to handle a lot of power and are very inefficient. There's a number of reasons subs need more power these days...listening preference, design, marketing, spl, etc.

Bottom line is that those sub notes cause a spike in power needs. A poorly designed power supply in an amp will not pull consistantly on the alternator and battery. If his voltage is dropping we don't know why just yet. If he has a 125amp alternator I would be shocked if that's the issue. His amps are rated a little less than mine and all I have is decent entry level equipment. My guess is that the 8awg from the alt. can't deliver on those power spikes and the battery can't keep up either. In these instances a cap can be a band aid. You can try the big 3 as well but like Matt said...this is a science.

Think it through so you don't waste time and effort on nonsense and think LONG TERM DESIGN too.
Powerhandling = Surface area of voice coil x heat extraction mechanisms in place.

Again, caps = 0.03 seconds of power. If the lights dim for even half a second, no cap can aid there. No battery can aid there unless the voltage drops to where it can output current.

Car battery - Wikipedia, the free encyclopedia

This is a chart of the charge level when there is no load on a battery. By this logic, batteries only put out current once the system has reached 12.65 V

Mainstream subs are inefficient because power in a home isn't at a premium and you can only get two of three things, Cost, extension, SPL and to get SPL at low frequencies you need to displace air, lots of it.

Don't bother with any RTA just get REW. Its free, minus signing up for the hometheatershack's forum and their annoying emails saying how they miss you all the time...

Is it not possible that the alternator decreases in performance over time? This I don't know at alll, but is a serious proposition I'm suggesting here.