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Changing reflected impedance


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psypathic 
Member - Posts: 13
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Joined: January 13, 2005
Posted: October 24, 2006 at 3:29 AM / IP Logged  
How would I make an amp see a 1 ohm load with 2, 4 ohm subs. I know people who do it with resistors in loudspraker designs with constant impedance networks but those networks only have 250-300 watts going through them. I'll be pushing about 3000. How do you do it and is it recommended.
i am an idiot 
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Joined: September 21, 2006
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Posted: October 24, 2006 at 3:56 AM / IP Logged  

   Get 2 more subs                or replace the 2 you have with Dual Voice Coil 4Ohm

  

psypathic 
Member - Posts: 13
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Joined: January 13, 2005
Posted: October 24, 2006 at 4:01 AM / IP Logged  
I was trying to avoid an upgrade.
Aruman 
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Joined: July 27, 2005
Location: Aruba
Posted: October 24, 2006 at 4:28 AM / IP Logged  
like i am an idiot said, get 2 more subs or change the one that's cheaper the Amp or the 2 subs.
Shaking The Neighborhood
haemphyst 
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Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
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Posted: October 24, 2006 at 2:38 PM / IP Logged  
If your amp is a stereo amp, bridging it WILL present one ohm to it. (Bridging into 2 ohms is the same as one ohm per channel.)
As your amplifier information was not provided, I can't tell you whether this will be the case.
Also, why do you feel you MUST drop your amplifier's load to one ohm? Even if you have a mono amp, and the only load you can acheive is two ohms, two ohms will be LESS THAN 3dB difference in output than a one ohm load. Run it at 2 ohms, and be done. Your amp will run cleaner, cooler, and last longer.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
jeffchilcott 
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Posted: October 24, 2006 at 3:11 PM / IP Logged  
Can I ask exaclty what you will be achieveing 3000 watts with?    What type of alt? how many batteries? 2 runs or 1/0?
What amp or Amps?   and to what speakers?
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