Amplifier Ω load question?

Is this amp OK?
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unsafe8989
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Joined: Tue Jan 24, 2012 7:35 pm
Location: Bakersfield California

Amplifier Ω load question?

#1 Post by unsafe8989 »

Ok , so in all my other post i have been using my cell phone but to ask this question i pulled out my laptop to try to use my typing skills.
So , i have seen in some posts here of running in parallel will either get you 16 or 2 ohms depending on how its wired. :? As well as running in series is a lower ohm load put parallel is a higher load. What im asking is if some one may please lecture me :noob: on how these ohm loads work. :conf: All i know is that 8Ω+8Ω=4Ω and 4Ω+4Ω=2Ω and 2Ω+2Ω is 1Ω. So like i said if some when can give me a lesson or lecture on how this all works so i can contain more knowledge on amplifiers ad also so i don't fry my amps , Thanks and have a nice day :fingers: . :feedback:

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Jon Barnhardt
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Re: Amplifier Ω load question?

#2 Post by Jon Barnhardt »


Sydney

Re: Amplifier Ω load question?

#3 Post by Sydney »

As well as running in series is a lower ohm load put parallel is a higher load.
You have it backwards.
In series it adds; it parallel it reduces.
http://www.allaboutcircuits.com/vol_1/chpt_5/1.html
http://www.allaboutcircuits.com/vol_1/chpt_7/1.html

unsafe8989
Posts: 45
Joined: Tue Jan 24, 2012 7:35 pm
Location: Bakersfield California

Re: Amplifier Ω load question?

#4 Post by unsafe8989 »

Thanks for the input time to start reading.

unsafe8989
Posts: 45
Joined: Tue Jan 24, 2012 7:35 pm
Location: Bakersfield California

Re: Amplifier Ω load question?

#5 Post by unsafe8989 »

So for example If i put my two Peavey 215 in series they are rated 700w program at 4Ohm so it would be a 8Ohm loud and the amp is a Peavey CS 4000hz witch is 800 watts @8Ohms how would that work?

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BrentEvans
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Re: Amplifier Ω load question?

#6 Post by BrentEvans »

unsafe8989 wrote:So for example If i put my two Peavey 215 in series they are rated 700w program at 4Ohm so it would be a 8Ohm loud and the amp is a Peavey CS 4000hz witch is 800 watts @8Ohms how would that work?
When you series wire, each cab sees only half the voltage. Your amp would have to drive 1400w at 8 ohms to drive them to their "Rated" power.

It's much easier to think about it in terms of voltage than current (watts). I like this calculator to help convert.

1400W at 8 ohms is 105 volts. You'd need a really efficient amp to get that... but 700 watts at 4 ohms is only 52 volts... there are many power amps that can do that easily.

You'd be best to run them on a 2 ohm stable amp which can push 52v at 2 ohms (1400w) or one per channel on one that can do 52v at 4 ohms (700w).
99% of the time, things that aren't already being done aren't being done because they don't work. The other 1% is split evenly between fools and geniuses.

Sydney

Re: Amplifier Ω load question?

#7 Post by Sydney »

unsafe8989 wrote:So for example If i put my two Peavey 215 in series they are rated 700w program at 4Ohm so it would be a 8Ohm loud and the amp is a Peavey CS 4000hz witch is 800 watts @8Ohms how would that work?
Fine
Since music has a varying dynamic range: the nominal operating level is much lower than peak. While peaks require much more power they are very brief, so the emphasis on large power handing/swing has to be put in the appropriate context of the crest factor and issues like high power non-linearity and thermal compression.
As an implementation philosophy; it is not necessary to drive speakers to full output - especially if it subjects the amp to excessive current.
A conservative approach provides long term durability.

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