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8 ohm vs 2 ohm


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gnrfan316 
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Posted: March 27, 2008 at 9:49 AM / IP Logged  
I have 1 Rockford Fosgate P3 12 inch DVC 4 Ohm Sub and a 1200 watt two channel Sony Explod Amplifier.  I have heard this sub on smaller amplifiers before and it sounds really good but mine sounds pretty crappy. I have it wired at 8 ohms to one channel (I think) and it sounds like crap. Any suggestions?
skee-weezy 
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Posted: March 27, 2008 at 11:25 AM / IP Logged  

here would be my suggestion...... ebay the sony... and get yourself an amp at the rated rms at 2 ohms... preferably class d mono..... most amps don't produce any serious power at 8 ohms... hence why your setup may not sound good... another thing u can do is get yourself a second sub like the one u have and series-parellel the two to 4 ohms which will allow u to bridge that amp to 4 ohm mono.....

there can be only one.......
i am an idiot 
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Posted: March 27, 2008 at 12:41 PM / IP Logged  
Connect one voice coil to the left channel of the amp.  Connect the other voice coil to the right channel of the amp.
haemphyst 
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Posted: March 27, 2008 at 1:01 PM / IP Logged  
i am an idiot wrote:
Connect one voice coil to the left channel of the amp.  Connect the other voice coil to the right channel of the amp.
There's your cheapest option... And EASY to do, as well!
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."
audioman2007 
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Posted: March 27, 2008 at 2:06 PM / IP Logged  

Instead of making a brand new topic, I thought it would be better to ask this in here.... What is the difference (sub performance wise) between 4 ohm and 2 ohm? I have 2 Earthquake DBX's single 4 ohm coil and wanted to know what would be the pros and cons of having them wired in 2 ohm instead of 4 ohm.

DYohn 
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Posted: March 27, 2008 at 3:43 PM / IP Logged  
audioman2007 wrote:

Instead of making a brand new topic, I thought it would be better to ask this in here.... What is the difference (sub performance wise) between 4 ohm and 2 ohm? I have 2 Earthquake DBX's single 4 ohm coil and wanted to know what would be the pros and cons of having them wired in 2 ohm instead of 4 ohm.

You mean besides the impedance change and the resulting difference in power utilization?  Here and  Here's a couple recent threads with some discussions for you.  The forum search function is your friend.

I would like to know how you intend to wire two 4-ohm SVC subs to create a net 4-ohm load?

Also, please stoip thread jacking.  If you want to ask questions on a new topic, start a new thread.

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audioman2007 
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Posted: March 27, 2008 at 6:03 PM / IP Logged  
If I was to bridge both subs to a 2 channel amp, the subs would be 2 ohms then, but the amp would be 1?
sedate 
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Posted: March 27, 2008 at 6:38 PM / IP Logged  

audioman2007 wrote:
If I was to bridge both subs to a 2 channel amp, the subs would be 2 ohms then, but the amp would be 1?

Right.

"I'm finished!" - Daniel Plainview
audioman2007 
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Posted: March 28, 2008 at 2:04 PM / IP Logged  
Hmmm. My old amp was 2 ohm stereo stable. When I first installed my system, I had the same subs (2 SVC 4 ohm 12" subs) and wired them like this: I bridged both subs to the amp which would put the subs at 2 ohms a piece and the amp at 1 ohm. The amp worked perfectly fine. I had to turn the gain on the amp down but it pounded hard, alittle too hard for me, so thats when I changed it to 4 ohm. Now if my amp is 2 ohm stereo stable, why would it work in 1 ohm mono?
DYohn 
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Posted: March 28, 2008 at 3:05 PM / IP Logged  

audioman2007 wrote:
Hmmm. My old amp was 2 ohm stereo stable. When I first installed my system, I had the same subs (2 SVC 4 ohm 12" subs) and wired them like this: I bridged both subs to the amp which would put the subs at 2 ohms a piece and the amp at 1 ohm.

That would be wrong.  If you parallel two 4-ohm SVC subwoofe4rs, the net resistance on the amp is 2-ohms.  The speakers do not magically change, they are still 4-ohm speakers.  If you connect a 2-ohm load across a stereo amp (bridged) that is only 2-ohm stereo stable, it should shut itself down in protection mode, or it may be able to handle the load in some rare cases, but will operate at much higher distortion levels.

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