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Old 12-15-2011, 05:12 PM
81SNS 81SNS is offline
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Join Date: Aug 2011
Boat: 09 X2
Location: southeast
Posts: 307
Amp/speaker see what you think, Swatguy others

I am getting ready to purchase my stereo equipment for my 81 SNS and am not a "authority" on the subject by any stretch of the imagination, what I have in mind is 4 Polk db651 with a MBQuart onyx 4.125 amp for now, I still havent decided which way to go for a sub, or where to install it for now, I am not trying to kill fish , just want some decent sounding tunes, I know Swatguy you bought a MBQuart amp while back, is it all you hoped it would be? thanks Hal
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Old 12-15-2011, 05:17 PM
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east tx skier east tx skier is offline
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Join Date: Jul 2004
Boat: 1998 Ski Nautique
Location: End of my rope.
Posts: 26,185
If you are short on room, consider a 5 channel amp. I have an Infinity Reference 5 chan. that puts out 50 watts per channel rms and 150 mono to the sub at 4 ohms. It doesn't sound like a lot, but it is plenty, with the gains not even approaching high settings to drive Polk DB 651s in the front, Polk DB6501s in the rear and an 8" Polk MM840 sub under the bow in a sealed box. I imagine I could have gone 10" under the bow, but for my ears, the 8" rounds everything out just perfectly. These amps are inexpensive and mine is on its 3rd year and going strong.
Previous: 1993 Prostar 205

Red 1998 Ski Nautique, PCM GT40, 310 hp, , Acme 4 blade, Perfect Pass SG/Zbox.


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Old 12-15-2011, 10:44 PM
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swatguy swatguy is offline
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Join Date: Mar 2007
Boat: Nautique
Location: Midwest, Chicago
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That Onyx amp is a ton of power at great pricepoint. While I did not pick one up myself i did recommend it as a powerful pricepoint amp to several people who have had good results from what I was told. While I wouldn't recommend it to someone who is going to go full Bose on their stereo everytime its in the water, for the guy who wants just a little more than stock and an occasional day of running full boar it is hard to beat. It has some nice above avg features. You can easily power your 4 cabins and a sub from it with no issues. You would use the front two channels to run your 4 speakers ( two speakers per channel) and then bridge the rear channel to the sub. A solid 8 or 10 inch would be great. With the smaller boat o think you would be OK if all you want is a bit more umff and aren't running 2pac all day long
I don't know much about your 81 and and what's under your feet, but you can always building's a box using the kickpanel as the front of the box.

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Last edited by swatguy; 12-15-2011 at 10:53 PM.
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Old 12-16-2011, 08:17 AM
agarabaghi agarabaghi is offline
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Join Date: Mar 2011
Boat: 1994 Mastercraft Prostar 205
Location: Southeast
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We had a sony multi channel amp that worked well, since the front 2 channels could run at 2ohms, we just hooked up 4 speakers to 2 channels, and then a small sub to left over channel bridged.

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