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Convert 4 Ohm Speaker to 2 Ohm


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juicejug 
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Member spacespace
Joined: May 15, 2013
Location: Illinois, United States
Posted: May 20, 2013 at 5:39 PM / IP Logged  
After reading this and looking around, I guess I may not have been looking at it properly. By adding a resistor, I'm increasing the resistance, not lowering it, correct? In that case is it possible to convert the opposite direction? I'm not looking to put it into practice, but just wondering.
As to the other post about other manufacturers that produce them, I purchased the mentioned brand's 2 ohm speakers originally and those are the ones that crapped out - without abuse - just listening to sports radio, etc.
2 ohm speakers have been terribly difficult just to find, and I am not going to replace the head unit as it is part of the nav and dashboard. Also, I don't want to screw around with digging around in the dash to add amps, etc. as I would need to do so for the dash tweets, the front door 6.5's and the rear 6.5's.
If there's an easy way to do this and I'm over thinking how much is involved, let me know.
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oldspark 
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Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: May 20, 2013 at 6:25 PM / IP Logged  
No. For your purposes there is nothing you can do.
Although you can make the "speaker load" look like 2 Ohm or 8 Ohm etc by adding another 4 Ohm resistor (or speaker), NONE of those will increase the power from your 4 Ohm speaker. It will still be a 4 Ohm speaker and hence the same power for a given voltage.
Replace the speakers.
juicejug 
Member - Posts: 3
Member spacespace
Joined: May 15, 2013
Location: Illinois, United States
Posted: May 20, 2013 at 6:26 PM / IP Logged  
The problem is that the unit only supplies for 2 ohm. I can't find any speakers that are 2 ohm, other than the ones I've already tried that are crap.
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oldspark 
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Joined: November 03, 2008
Location: Australia
Posted: May 20, 2013 at 6:40 PM / IP Logged  
It should be able to supply a 4 Ohm speaker without problem (despite what I once thought until educated by the12volt).
It will probably be at half the power and hence slightly lower volume but nothing will change that apart from different speaker (maybe more sensitive?) or a different amp or an additional amp.
soundnsecurity 
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Joined: November 10, 2008
Location: Louisiana, United States
Posted: May 20, 2013 at 6:42 PM / IP Logged  
if you bought infinity speakers im not surprised that they blew under normal conditions, they just dont last for whatever reason. but dont let that get you away from the best solution of buying new speakers, i think JBL makes 2 ohm speakers, a lot of higher end brands make 2 ohm speakers. the XXX components from RE audio are also 2 ohm speakers but those will probably require more labor to install than just screwing in a new speaker in the door.
DYohn 
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Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.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: April 22, 2003
Location: Arizona, United States
Posted: May 22, 2013 at 11:12 AM / IP Logged  
There's no such thing as an amplifier that can only supply into 2-ohms. ANY amplifier can supply any higher impedance than the minimum they list in the specs. And it is IMPOSSIBLE to change the impedance of a loudspeaker voice coil without replacing the voice coil.
Once more for clarity: If your amplifier is rated into 2-ohms, that means 2-ohms is the least amount of impedance it can handle. It will work just fine with anything higher than that.
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