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Question On Bridging?


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Gcschi22 
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Posted: November 16, 2004 at 7:52 PM / IP Logged  
Ok i have 2 Dual 2 ohm voicecoil Audiobahn Eternal 12" subs. (1100 rms, 2200 peak) and a boss Pd-4000 watt amp(3000x1 @ 1 ohm, 4000x1 @ 1/2ohm) and i wanted to know that if i bridged the amp down to one ohm, would it distribute 3000 watts to EACH sub, or distribute it evenly? Very confused on the whole bridging thing.
Ketel22 
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Posted: November 16, 2004 at 8:00 PM / IP Logged  
it would distribute it evenly....you can run parallel series to get 2ohms or parallel parallel to get 1/2ohm...i don't know how u plan to get 1 ohm...
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kfr01 
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Posted: November 16, 2004 at 8:25 PM / IP Logged  
And not to be a jerk, but I'd be VERY skeptical about that amp actually pushing a clean 3000x1 @ 1 ohm without frying itself in a matter of months.
Run it at 2-ohms. Your ears will thank you. The amp probably won't break.
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Gcschi22 
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Posted: November 16, 2004 at 8:28 PM / IP Logged  
Im a noob with this, this is actually my first system. So i wont be able to run at 1 ohm? 3000x1?
Ketel22 
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Posted: November 16, 2004 at 8:30 PM / IP Logged  
check out the series/parallel calculators available on this site. mess around with them and educate urself a little bit about ohms law it will come in handy. no you won't be able to get a 1ohm load using both subs. only a 2ohm load or a half ohm load.
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Gcschi22 
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Posted: November 16, 2004 at 8:33 PM / IP Logged  
Is that because the subs are dual 2 ohm Vc? What kind of amp would you recommend thats chepa and powerful to run the subs?
Gcschi22 
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Posted: November 16, 2004 at 8:43 PM / IP Logged  
Why wont i be able to get a 1 ohm load between the 2 of my subs?
haemphyst 
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Posted: November 16, 2004 at 8:46 PM / IP Logged  
OK... first off, to the amplifier. That amp only has 4 30A fuses in it, so it's maximum safe input current is 120 Amps, right? 120A X 14.4V = 1728watts IN! I want to know HOW IN THE HELL are you going to get 4000 watts out of a device when you are putting only 1728 watts IN (and what about the losses? is it a class D amp - at best 95% efficient - 1641 watts out, class AB, 50% efficient - 864 watts out) In typical Boss fashion, they are playing the BULLsh*t card, and they SAW YOU COMING!!! Did you get a kiss? This is why I say NEVER BUY those mass market, slave labor, chinesawan, import garbage, amplifiers.
Now, to the possible loads with the drivers you have... 4 two ohm voice coils will net 8, 4, 2 or 1/2 ohm loads. If you are going to bridge this amplifier, and you want maximum output (shyah, right) you will have to go to the 2 ohm setting, which will be the voice coils on each woofer in series (2 + 2 = 4ohms) then parallel the two woofers (4 / 2 = 2ohms), then you can bridge the amp, for a net load of one ohm per channel. This will give you 3000 watts (see previous paragraph) and an overall efficiency from your amplifier of 173.6%! SWEET! Boss has figured out the answer to "power from NOTHING"!!!
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."
stevdart 
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Posted: November 16, 2004 at 8:49 PM / IP Logged  

Here .............taker Ketel's advice.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Gcschi22 
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Posted: November 16, 2004 at 8:51 PM / IP Logged  
What do you suggest then? cuz obviously your a genius when it comes to all this.. so help me out? what do u suggest?
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