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Parallel 4 ohm and 8 ohm?


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tmorefi 
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Joined: October 01, 2002
Posted: April 18, 2005 at 2:31 PM / IP Logged  
Can you parallel a 4 ohm speaker with an 8 ohm speaker? What would be the impedance? 5 ohm?? Thanks.
mikew04 
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Joined: March 16, 2004
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Posted: April 18, 2005 at 2:36 PM / IP Logged  
It would be at 2.6ohms. It will work if your amplifier can handle the load.
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DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: April 18, 2005 at 2:43 PM / IP Logged  
And realize that the 4 ohm speaker will receive twice the current flow as the 8 ohm speaker.
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ravenndude 
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Posted: April 18, 2005 at 2:45 PM / IP Logged  
It would be a 2.667 ohm load.
1/4 + 1/8 = 1/r
2/8 + 1/8 = 1/r
3/8 = 1/r
8/3 = r
r = 2.667
or use this
I don't know how that would sound though and how the power would distribute between the two (that's a little too advanced for me).
Are you trying to mix home audio with car? Or do you have a mid that's 4ohms and a tweeter that's 8ohms?
wow ... two people posted before i could type this.
tmorefi 
Member - Posts: 31
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Joined: October 01, 2002
Posted: April 18, 2005 at 2:46 PM / IP Logged  
Oh perfect. So another question. If my amp (Orion 8004) is rated at 100 x 4 at 4 ohms and 200 x 4 at 2 ohms, do you know what it would do at 2.6 ohms? About 175 x 4?? Thanks again.
DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: April 18, 2005 at 2:48 PM / IP Logged  
The 4 ohm speaker will produce twice the power of the 8 ohm speaker.  It is not a good idea to do this except in special installations.
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