Audio question - running 8 speakers off a 2 channel amp
01-09-2006, 11:48 AM
#21
Registered
Thread Starter
Re: Audio question - running 8 speakers off a 2 channel amp
Originally Posted by noboat
Also, is there a way to figure out power(wattage) that an amp poduces between the 2 and 4 ohms? In other words, if an amp is rated at 720 watts RMS at 4 ohms and 960 watts RMS at 2 ohms how do you figure out what power it would have at 2.67 ohms?
01-09-2006, 01:14 PM
#22
Re: Audio question - running 8 speakers off a 2 channel amp
I'm no EE and my math is rusty but I'm coming up with about 805 watts. This is based upon checking out the amps voltage decrease with ohms decrease and figuring out how much voltage will be at its outputs with a 2.67 ohm load. But one doesn't have to go through all this when matching amps to speakers. When in doubt, overpower.
01-09-2006, 01:26 PM
#23
Registered
Join Date: Jan 2002
Location: toledo oh
Posts: 232
Likes: 0
Received 0 Likes
on
0 Posts
Re: Audio question - running 8 speakers off a 2 channel amp
easy formula to follow to figure ohm load in parrallel
2 4ohm speakers in parrallel
1/x + 1/x= eg. (1/ 4ohm + 1/ 4ohm = 0.5ohm =x
divide by 1/.5 = 2ohm load)
1/x
can be used for multiple speakers also
I think that I did that right some one let me know if thats wrong.
2 4ohm speakers in parrallel
1/x + 1/x= eg. (1/ 4ohm + 1/ 4ohm = 0.5ohm =x
divide by 1/.5 = 2ohm load)
1/x
can be used for multiple speakers also
I think that I did that right some one let me know if thats wrong.
01-09-2006, 01:51 PM
#24
Registered
Thread Starter
Re: Audio question - running 8 speakers off a 2 channel amp
Originally Posted by UNSANE
I'm no EE and my math is rusty but I'm coming up with about 805 watts. This is based upon checking out the amps voltage decrease with ohms decrease and figuring out how much voltage will be at its outputs with a 2.67 ohm load. But one doesn't have to go through all this when matching amps to speakers. When in doubt, overpower.
01-09-2006, 01:54 PM
#25
Registered
Thread Starter
Re: Audio question - running 8 speakers off a 2 channel amp
Originally Posted by batty
easy formula to follow to figure ohm load in parrallel
2 4ohm speakers in parrallel
1/x + 1/x= eg. (1/ 4ohm + 1/ 4ohm = 0.5ohm =x
divide by 1/.5 = 2ohm load)
1/x
can be used for multiple speakers also
I think that I did that right some one let me know if thats wrong.
2 4ohm speakers in parrallel
1/x + 1/x= eg. (1/ 4ohm + 1/ 4ohm = 0.5ohm =x
divide by 1/.5 = 2ohm load)
1/x
can be used for multiple speakers also
I think that I did that right some one let me know if thats wrong.
01-09-2006, 02:29 PM
#26
Registered
Join Date: Jan 2002
Location: toledo oh
Posts: 232
Likes: 0
Received 0 Likes
on
0 Posts
Re: Audio question - running 8 speakers off a 2 channel amp
now all that Engineering school has paid off !!! Thats a pertty cool website lotsa information to learn from.
just becareful with the power of the amps. You dont want to let the smoke out of the speakers!
just becareful with the power of the amps. You dont want to let the smoke out of the speakers!
01-10-2006, 01:06 AM
#27
Re: Audio question - running 8 speakers off a 2 channel amp
Originally Posted by noboat
It was more of a curiousity thing. I was coming up with 800 watts at 3 ohms so I figured 2.67 would be about 830-840. But I was too lazy to rack my brain and it's been way too long since I have had an algebra class!!!
