Questions on a huge system in a boat.

[waterboy 10+ year member]

I dont think that bit of weight will effect it that much, unless we are talking 500+ Ibs.

I have top end props on it which make it TOUGH to get on plane as it is with 5 people on board, ice chests, all the girls luggage and enough fuel to complete an entire poker run. As it is, im concerned about getting on plane with another 500 lbs of stereo equipment.. and i REALLY dont want to change props. it took me a year to get this boat dialed in with the HP it has.

 

[waterboy 10+ year member]

Build an amp rack with a plexi cover and light it up with neons or leds that would fix the amp problem, also you will want more than one 1000.1 for the l7's my friend has a 10 l7 with a memphis pr1000 on it and it rocks.

I did that on my last boat. I had condensation droplets all over the inside of the plexi by the end of the first weekend..

How many amps should I get to run the L7's? Should i downsize the number of subs or what?

 

[memphisman 10+ year member]

I would get atleast one amp per sub depending on the coil configuration of each subwoofer.

 

[1000101 10+ year member]

Nice boat man.. def a ***** magnet.. . post more in detail pics as you go.. but once again I mention memphis marine amps.. .and the other guy mentioned cadence.. um ya cadence is the shiznit for sure def start there... as far as moisture resistance... i'd build some sort of plexiglass enclosure and mount that baby right out on the deck and show that off for the honeys... shiznit i'd even make all the seat have their own sub underneathe to get those ladies in their bikinis nice n creamy with the bass.. .(thats bass as in sound not a fish lol)

nobody wants a girl nice in creamy from a fish

 

[mepratt1234@cha 10+ year member]

I would not use that many subs. You would need a lot more power to get them going and you don't want to have to use more amps.

More amps = more power = more current draw = more batteries = more weight.

 

[audioholic 5,000+ posts]

The link you posted to the batt you are looking at has a small 'minutes of discharge' chart.

8 amps - 1670 mins

15 amps - 825 mins

25 amps - 475 mins

So roughly speaking, that batt will give you 25 amps for 8 hours. Are you designing a system that will average 25 amps current draw over that 8 hour period? Depends on the material and volume at which its played, but you are certainly talking about a system capable of drawing alot more power than that. Alot more.

Your plans need to include more batts, more engine-on time, and/or smaller goals. imo

 

[bass-aholic 10+ year member]

A. why do you want to use 4 l7 12"s on a boat

B. why do you want to power them with 1000 watts when you should have 3000-4000 watts?(your gonna need a lot to support that kind of power)

c. IMO this is a silly idea, just go with a bunch of 6x9's maybe 1 sub.

 

[waterboy 10+ year member]

Thanks for the help.. Ive decided to keep with the 1000.1 amp and back down to two 10's.. The battery that Ive been looking at wont work for what I need. Ive decided to go with 6- 6v golf cart batteries. They are setup for more amperage draw than an RV battery. With the numbers ive provided. Im looking at about 5 hours to discharge at moderate volume. I can live with that. There will be no advantage to engine-on time because with the big block motors, they only come with one alternator to charge both starting batteries and marine alternators are NOT cheap, ESPECIALLY high RPM (6200), HIGH AMP alternators.

That 5 hours is based on full throttle volume so hopefully with responsible knob control, Ill make it through the day and when its dead, time to head to the dock and charge back up ..

Thanks for all the the help and Ill post pics as soon as i start. Probably wednesday. The girls are already excited ;-)

designing a system for a boat like this has been a very unique challenge because i want/NEED to be able to hear it while running down the lake with two open-exhaust big block motors spinning over 6000 rpm only 5 feet from everyones ears.. Add the windnoise on top of that, you can see how tough its been and why i chose what I chose.. thanks

 

[Buck 5,000+ posts]

you are insane. i like it

 

[waterboy 10+ year member]

coming together nicely. Ill try to get some pics of my 4 amp rack that lit from the ceiling with white and yellow LEDS and the sunsation logo.

 

[Harleyfx69 10+ year member]

get some air bags in that truck man ..

Your rear end is LOW

 

[waterboy 10+ year member]

if you look in the pic, there is a drainage concave that the back tires are parked in.. it sits much more level than that! That boat is a light layup. The truck has WAY more potential for pulling that my little 6500lb boat!

 

[waterboy 10+ year member]

anybody know of a product (adhesive) that can be used to hold a peice of mirrored plexi to a fiberglass hull? I cant put screws into it (for obvious reasons) so ill have to build it away from the hulsides and attach the amps to a board with the mirrored plexi on it... Attaching the board to the fiberglass is what Im struggling with.

 

[audiolife 5,000+ posts]

kinetik has a new 3800 that is coming out that is a marine battery somewhere in the hundred lb++ range.