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Old     (zleartsu)      Join Date: Mar 2004       03-09-2010, 10:02 AM Reply   
I getting a really good deal on a fiberglass box that holds 3 pairs of Polk 6.5 DB651. What would be the best way to power these guys?
Old     (polarbill)      Join Date: Jun 2003       03-09-2010, 10:20 AM Reply   
Here is a good option.

http://www.arcaudio.com/productdescr...ies/ks3004.asp

If you want something cheap you could check out Hifonics amps and get one that is 75x4 or so.
Old     (zleartsu)      Join Date: Mar 2004       03-09-2010, 1:10 PM Reply   
Yeah I guess I just not sure how to wire it correctly. I don;t want to short/blow the amp. So i quess my question should be how should I wire them?
Old     (david_e_m)      Join Date: Jul 2008       03-09-2010, 2:37 PM Reply   
Zach,

1.) Run the left three in series for 12-ohms, the same for the right. Bridge a 4-channel amplifier into 2-channels. Use an amplifier that generates its full power into 4-ohms, so you're not losing much of its full rated power into what will be the load equivalent of 6-ohm stereo. An Alpine PDX will work here.

2.) Wire the left three in parallel for 1.33-ohms, the same for the right. Use an amplifier that is 1-ohm stereo stable like the Boston Acoustics GT-2200.

3.) Wire the left three in series, same with the right. Parallel the two sides for a collective 6-ohm mono load. Use the JL Audio HD 750/1 monoblock.

Obviously you can run a six channel amplifier with twelve conductors up the tower but the above three scenarios, and a few other options, will allow you to maintain a four-conductor tower harness.

While the speakers may be inexpensive, you have a combination (six tower speakers) that is expensive to power reliably.

David
Earmark Marine
Old     (polarbill)      Join Date: Jun 2003       03-09-2010, 2:59 PM Reply   
Quote:
Originally Posted by david_e_m View Post
Zach,

1.) Run the left three in series for 12-ohms, the same for the right. Bridge a 4-channel amplifier into 2-channels. Use an amplifier that generates its full power into 4-ohms, so you're not losing much of its full rated power into what will be the load equivalent of 6-ohm stereo. An Alpine PDX will work here.

2.) Wire the left three in parallel for 1.33-ohms, the same for the right. Use an amplifier that is 1-ohm stereo stable like the Boston Acoustics GT-2200.

3.) Wire the left three in series, same with the right. Parallel the two sides for a collective 6-ohm mono load. Use the JL Audio HD 750/1 monoblock.

Obviously you can run a six channel amplifier with twelve conductors up the tower but the above three scenarios, and a few other options, will allow you to maintain a four-conductor tower harness.


While the speakers may be inexpensive, you have a combination (six tower speakers) that is expensive to power reliably.

David
Earmark Marine

Dave, is it possible to run a 4 channel amp with 2 of the channels running 2 of the speakers at 2 ohms and then the other 2 channels running 4 of the speakers at 2 ohms?
Old     (david_e_m)      Join Date: Jul 2008       03-09-2010, 3:56 PM Reply   
Brett,

Absolutely. Its just more difficult to set the gains equitably so I created scenarios where this wouldn't be a challenge.

For example, A JL G4500 4-channel amp which is well under $300.00, would exceed the 651s' power rating at every terminal. It would net after gain correction over 400 watts into the collective six speakers rated at 330 watts.

David
Earmark Marine

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