I am not an audiophile but I see that most folks won't play their stero full blast all the time but at the same time your car runs accessories that take draw as well.
Just food for thought, when I'm ready for tunes I'll check out your hifonics amp as I've heard good things about them.
B
This is my amp. http://www.sonicelectronix.com/item_12207_Hifonics-ZXi-8408.html
It is discontinued but it is 4 x 110 Watts per channel RMS @ 4ohms. All my speakers are 4ohm.
My thinking is with Alt. output of 14V DC x 60 Amps = 840 Watts Alternator output.
The front speakers in the dash and head unit at 100 watts RMS, The kick panel speakers at 120 watts RMS, Sub at 200 watts RMS total 420 watts RMS output.
420w output at 62% efficiency or 420/.62=677 watts input.
677watts/14v= 48A This would be worst case constant load at full blast volume.
Still though I have considered upgrading to a higher output alternator. Maybe 75Amps...
I plan to install the Alt. bypass and Headlight Relays first.
I'll bring an amp clamp home from work and measure the actual Alt. output with everything on and tunes cranked up sitting at idle. 
I will post results when I do.
Topic: Loud and clear music in a convertible? Yup! Update added Center Dash Speakers (Read 7225 times)
