Charging System on 86 BlackMax

[draglink]

I have a late 80s or early 90s Black Max. 2 battery set up under console.
I have 4, 6" JL speakers.
I wired up 2 speakers directly to the stereo. The other 2 I have run through a 100w amp. I have the amp wired to turn on by a switch. When I am running slow, or beached, I turn the amp off to save the batteries. When I am fast trolling to cruising, the amp is on and I get GREAT sound at all speeds.

I had my Mako wired up this way also....in probably 5 or 6 years and 2 boats, it has worked great for me

[1BadTitan]

Here's Plan B... 4 6 1/2" speakers run straight off the radio and a pre-powered sub in the cuddy... Will that be loud enough to still comfortably hear it while running?

[smokeonthewater]

very much so
above decks on my 30'er I have two 6.5's running in series with two more in the v berth sharing 30 watts rms between all 4 and 2 6x9's at 15 watts rms each in the back of the cabin.... I am I/O with 2 mercruiser 260's and even WOT at 48mph I don't need more than half volume to hear it clearly.... I hate having to shout over the radio to talk to others while driving.