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View Full Version : Pick my amp (from Amazon)!


catamount
05-03-2012, 12:29 AM
Hey everyone,

Hoping to place an order from Amazon tomorrow for a pair of Polk DB 651s and a pair of DB 691s.

However, I know absolutely NOTHING about amps. I might add a sub in the near future, so about the only thing I do know is that it should be able to handle 5 channels.

Could anyone point me in the right direction? This is a budget build, the boat is an '87 PS 190 and I'm just looking for the least expensive way to get some solid sounds out of these Polks.

Any and all help is appreciated!

mzimme
05-03-2012, 12:44 AM
How much of a budget?

catamount
05-03-2012, 12:57 AM
$150 or less? Or is that unrealistic. Also, should I buy wire through Amazon?

cwarndahl
05-03-2012, 01:02 AM
I just bought the mb quart onyx 4.125 and I'm happy with it.

cwarndahl
05-03-2012, 01:03 AM
Got it of amazon to but I think it was 169

cwarndahl
05-03-2012, 01:06 AM
They also have a my quart nautical and it's a 6 channel x 60 watts, bridge mono 5 and 6 for 130 watts. I still run my in boat speakers of the factory clarion and that's 50 watts to each of my 6 1/2 which I got the the kicker 6500 for 80 a pair and it's slamming so I wouldn't be scared of the wattage, I also went with kicker mt60 for 300 off amazon with a new sub and clarion cmd7 met my under 1k budget, I'm not louder then the guys with the high dollar stuff but I'm real happy with what I got

east tx skier
05-03-2012, 10:14 AM
I have been using one of these to power pretty much your same setup in a closed bow for the past 3 years. Infinity 5350a (http://www.amazon.com/Infinity-Reference-5350a-Performance-5-Channel/dp/B000R22X1A/ref=sr_1_1?ie=UTF8&qid=1336050770&sr=8-1). They are a bit cheaper elsewhere.

If I ever have to replace it, I would probably go with one of the Alpine PDX5s if only for the small size.

swatguy
05-03-2012, 10:51 AM
Just so u know u don't need a 5 channel amp to run the 4 speakers and a sub. Since you are on a budget sticking with a 4 channel will save u cash and allow you to get a bit more wattage for your dollar. Those MB Quart Onyx Amps I feel are one of the best budget amps out there followed by kicker.

To set up for the sub you would run two speakers to each front channel. And then bridge the rear two channels for the sub.

Then now since you don't have a sub yet you can just run all 4 speakers to each of its own channels.

Piece of cake.

I don't recall the specs on the db951 but I do know the 651 will sound great with 75watts end to them.

The Onyx 4.80 would be good. Maybe little low on wattage depending on how big a sub u want, but with the speakers u have the sub wattage from the 4.80 will be ok. Just take the time to tune it correctly.

catamount
05-03-2012, 11:03 AM
Thanks swatguy! I did not know that... I will now be searching for a 4 channel. Thank you for detailing the hookup information as well!

Just one last question, mb onyx looks to have about a bazillion 'quart' amps.

Can I get away with this one?

MB Quart ONX4.60 4 Channel Amplifier 4 x 60 @ 4 OHMS, 4 x 120 @ 2 OHMS, 2 x 240 @ 4 OHMS

http://www.amazon.com/MB-Quart-ONX4-60-Channel-Amplifier/dp/B00375LC3Y/ref=sr_1_2?s=electronics&ie=UTF8&qid=1336053798&sr=1-2

swatguy
05-03-2012, 11:08 AM
I would do the 4.80 minimum just because u may want to add a sub later. The 4.60 would work for the inboats and a sub as well. I just think the polls really like more wattage than the 4. 60 provides. The 4.60 will work fine for what u want as the bridged power for a sub is only 10 less watts rms. So if its a huge price difference between 4.80 go for it, but again the 651' s would sound great with that 4.80


Those Polk db 651 really sound crisp with 75-80 watts to them. You won't hurt them at all. Again this is eall assuming the specs on the 951 are similar to the 651 .

swatguy
05-03-2012, 11:21 AM
One other thing that completely slipped my mind that may throw a monkey wrench in is where.do you store your boat? Is it kept outside or inside a garage? Or is it stored on a lift. I ask because if your boat is outside and sees sun, dark, n humidity you may want to opt for a marine amp. If its garaged usually and not exposed to those under the cover heat changes a standard car amp is fine. The reason is the car amp will pit over time if it sees all those humid conditions outside under a cover constantly.

catamount
05-03-2012, 11:23 AM
It's only a $20 difference, I will go for the 4.80. Thanks a ton for the help this morning!

catamount
05-03-2012, 11:31 AM
swat, it's a garage queen right now but I am shopping for a lift with a canopy. So hopefully it will always have air enough to breath and air out.

One last question, what kind of wire should I use to hook this all up with? Can I use the heavy gauge wire from Lowes? I know I should be googling this, and will be as soon as I post this.

Montemx
05-04-2012, 02:36 PM
One other thing that completely slipped my mind that may throw a monkey wrench in is where.do you store your boat? Is it kept outside or inside a garage? Or is it stored on a lift. I ask because if your boat is outside and sees sun, dark, n humidity you may want to opt for a marine amp. If its garaged usually and not exposed to those under the cover heat changes a standard car amp is fine. The reason is the car amp will pit over time if it sees all those humid conditions outside under a cover constantly.

Not trying to hijack this thread, but what's a marine amp that would be similar to the The Onyx 4.80 in price and power?