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Old 03-17-2013, 01:58 PM
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Rossterman Rossterman is offline
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Anyone using polk audio amps?

Planning to add an additional amp to power new hlcd's and researching the new polk multi channel class D amps. Pretty small footprint for the power output, and more efficient than class A/B with less heat. Has anyone used these before? If so, how did they workout?

Here's how I was planning to pull it together if anyone has any ideas (everything is running through an arc audio parametric equalizer to allow control between towers and cabin):

Main cabin -
Polk D4000-4 powering each of the 4 DB651's at 125 watts @ 4ohms

Subwoofer-
Polk D2000-2 bridged to 1 channel running polk MM1040 10" sub at 500 watts rms @4 ohms.
Arc audio (5th channel) running bazooka 8" marine tube at 190watts @ 4ohms

Tower-
Arc audio xxk5150 running kicker km6500.2 2 channels bridged at 150 watts rms @ 4 ohms

Another option i am considering is to leave the arc amp driving the in boat speakers (45 watts x 4 channels) so as to not overpower them and power the towers on the polk d4000.4 (400 watts x 2 @ 4 ohms bridged) but thought it would be safer to not overpower and blow the tower speakers so was leaning towards as described above.

Which way should I set this up?

Thanks
Ross

Last edited by Rossterman; 03-17-2013 at 02:11 PM.
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Old 03-17-2013, 09:48 PM
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Anybody?..
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Old 03-24-2013, 10:19 PM
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Rossterman Rossterman is offline
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Came across the " birthing sheet" for the arc audio today and looks to be 230watts per channel bridged at 4 ohms. Was thinking it might be best to use the arc audio to run the kicker 6500.2's since they are 200 watt rated and using the polk 4000.4 for the in cabin db651s ( probably over powered @ 125 watts per channel). Picked up a polk 1000.1 for the sub. Hoping to start the work later in the week will let folks know how it works out.

Never did hear if anyone is using these new class D polk amps (found they are clones to precision power inc (PPI) and NVX if anyone tried these looks like they will both fit on the glassed in mounting plate under the driver seat but will know for sure later in the week.

Last edited by Rossterman; 03-24-2013 at 10:33 PM.
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Old 03-26-2013, 04:06 PM
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sgoyal sgoyal is offline
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Rossterman, I put the POLK D 4000.4 in my boat for 4 Exile SX-65M speakers. I was really happy with the setup.. I got a steal deal on POLK D4000.4 ($120 brand new unopened box) on craigslist otherwise I almost bought the JL or Alpine..
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Old 03-26-2013, 04:36 PM
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JRW160 JRW160 is offline
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A few friends of mine are running those new small class d amps. They have been really happy with them. I will probably upgrade my in boat amp to one of those amps in the not so distant future.

Keep in mind that the ratings for the polk amp are probably at 14.4v. Those amps will put out considerably less on the 12.5v or so feeding them in the boat. It looks like the 4000.4 will put out around 105w per channel at 12.6v. That's still quite a bit more than the 60w the db651s are rated for.
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Old 03-26-2013, 06:19 PM
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Thrall Thrall is offline
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Also you can dial down the gain to not overpower any of your speakers.
Better to have amps that are overrated for their intended use anyway. They'll last longer with more dyanmic headroom and won't be running balls out to do what you're asking of them.
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