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View Full Version : What amp for 4 polk 6.5 tower speakers?



trebor-75
09-15-2010, 09:03 PM
I am looking at getting a couple Aerial Twin Bullets for my tower (which is a total of 4 polk 6.5s) Any recommendations on what amp to power them? Id like to keep it as cheap as possible too. Thanks

Razzman
09-15-2010, 09:23 PM
I'm assuming they are the DB651's? If so they are rated 100w rms @ 4ohms so any amp in that general range would work. Cheap is one thing though and i would definately stay with a quality product no matter who's it is.

jmvotto
09-15-2010, 10:01 PM
Kicker 450.2 will be plenty and good power. should be able to get around 200 or less.

EarmarkMarine
09-15-2010, 10:47 PM
For conventional tower speakers we use a ton of the JL Audio J2 360.2 which is less than $170.

David
Earmark Marine

jmvotto
09-15-2010, 11:01 PM
For conventional tower speakers we use a ton of the JL Audio J2 360.2 which is less than $170.

David
Earmark Marine

good choice i was also trying to find the jl m2250, but its been discontinued only small amount of inventory left. love the jl audio

lewisb13
09-16-2010, 09:33 AM
I'm assuming they are the DB651's? If so they are rated 100w rms @ 4ohms so any amp in that general range would work. Cheap is one thing though and i would definately stay with a quality product no matter who's it is.

Negative. They're only rated at 60 watts RMS at 4 ohms.

http://www.crutchfield.com/p_107DB651/Polk-Audio-db651.html?tp=95&tab=features_and_specs

EarmarkMarine
09-16-2010, 10:34 AM
Just as Lewisb pointed out the rms rating is 60 watts for the Polks. That is a fullrange rating but in the highpass mode, when the bottom two octaves are eliminated, they will safely handle more power. So I would recommend going over the top of the 60 watts in consideration of the fact that they are being used for the tower which is a challenge for any conventional coaxial. Properly tuned it will be okay.

David
Earmark Marine

Razzman
09-16-2010, 11:46 AM
So what gives then as according to Polk's site they're rated at 100w continuous and 200 peak, you saying they're wrong on they're site?

http://www.polkaudio.com/caraudio/db/specs.php#coaxialr

EarmarkMarine
09-16-2010, 11:57 AM
Who knows why a manufacturer publishes different specs at different times for different mediums? We've used the Polks for years and never had an issue
going over the 60 watt mark in the highpass mode. But I do believe that 100
watts fullrange would be a little rich for that speaker. DEI (known for there security systems, Viper, etc) assumed control of Polk automotive products some time ago and since then lots of issues are unexplainable.

David
Earmark Audio

lewisb13
09-16-2010, 12:35 PM
All Im saying is that 60W RMS is stamped right on the magnet.

jmvotto
09-16-2010, 01:43 PM
All Im saying is that 60W RMS is stamped right on the magnet.

Yeah i think its a clerical error on there site.

trebor-75
09-16-2010, 05:58 PM
For conventional tower speakers we use a ton of the JL Audio J2 360.2 which is less than $170.

David
Earmark Marine

So since thats a 2-channel amp, you would just use each channel to power 2 speakers wired in a series? And that would still supply enough power to each?

EarmarkMarine
09-16-2010, 07:40 PM
You would have a total of four conductors running up the tower, L +&- plus R +&-. The two left speakers would be wired in parallel for a 2-ohm load and the same with the right. The JL amplifier is comfortable with a 2-ohm load.

David
Earmark Marine

cab13367
09-16-2010, 09:15 PM
So since thats a 2-channel amp, you would just use each channel to power 2 speakers wired in a series? And that would still supply enough power to each?

Trebor,

As David says, you run one pair of speaker wires (+ and -) to each side of the tower, connect the speaker wires to one speaker, then connect the first speaker to the second by wiring the positives together and wiring the negatives together. Do the same for the other side. The amp will see a 2 ohm load per channel. The JL amp puts out 180W continuous per channel at 2 ohms and since you are pushing two speakers with each channel, each speaker would get 1/2 of that, or 90W which is plenty for the db651's.

Hope that helps.

Al