do i need an amp for the cabin speakers? how will the quality be?
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Thread: db651 amp needed?
12-28-2010, 12:45 AM #1Member
- Join Date
- Feb 2010
db651 amp needed?
12-28-2010, 01:05 AM #2
Yes you will want an amp. An amp would make a dramatic difference. The head unit def cannot give much power to the Polks.
I am pulling my factory 4 channel amp out of my boat. I might be interested in selling. It is a Kenwood KAC 8402. PM me if you want to discuss it.2006 Supra 24SSV
12-28-2010, 08:47 AM #3
Bare minnimum is a 50 watt RMS to each Polk but they prefer a 80 to 120 RMS amp because the Polks sound better they louder they go.Malo <--- Means--Evil or Mean One. This explains a lot.
2013 Mojo 2.5 Skylon Tower. Bestia < Beast >
6 SX65M Cabins
6 XM9 Towers
1 XI Big 15 Woofer in a custom Fiberglass box
1 XI 1K Harpoon
2 XI 800.4
1 XI 2500.1
2 Interstate 2400U 6V Golf Cart Batterties
Custom 1 Off Evolution Cover
12-28-2010, 09:43 AM #4
Aren't the polks rated at 50w rms?2006 Supra 24SSV
12-28-2010, 10:12 AM #5
Consider that if you are running the coaxials highpass, as you would if you have a subwoofer, operating with a reduced bandwidth you can comfortably exceed the speakers rated power as long as you keep it clean. An honest 60 watts RMS is a good level for these in the boat. Another one-third power will only yield a 1 dB increase which is the smallest increment that you can discern. Also, as you double the power you will not get the expected 3 dB increase as you approach the speaker's top end. Understand that eventually compression enters into EVERY speaker. And with compression you lose dynamic contrast and clarity. So the key is balance.
12-28-2010, 03:24 PM #6
2006 Mobius LSV
12-28-2010, 05:20 PM #7
Rj - Do you need? No. Should you have? Yes....
As everyone has pointed out, powering your cabin setup will give you some real benefit's. If you are going to add an amplifier to power them, take the time to look at your whole stereo system and plan accordingly to run the correct gauge power cables, distribution block if needed. Fusing etc... It might sound like crazy complicated stuff but its not and people here can walk you through the correct setup.
Also, one of the real benefits of having a amplifier in the mix is because you can run your polks in HP (highpass mode) and limit the amount of freq range the speakers will see. Trust me, your polks will love you for this. Often times people take the time to upgrade speakers, but when they go back and drive them from a head unit and max out the freq range + deck power, the result is ugly.
If you need some guidance on the stereo layout, shoot me a PM... I've got a couple of PDF's I can shoot you.
12-28-2010, 05:32 PM #8
The "New stereo install help please" thread also has some good diagrams that attempt to break the wiring down to more simple instructions.
Brian, maybe some of your PDF's could find a home there.2006 Supra 24SSV
12-28-2010, 05:37 PM #9Member
- Join Date
- Feb 2010
thanks alot for all the help guys. I have decided to definitely throw an amp in her. That will make a total of 4 amps in my baby.
12-28-2010, 05:47 PM #10