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Speakers running A+B/Amps

post #1 of 3
6/26/11 at 8:19pm
Thread Starter 

Ok most Integrated Amps and Stereo Receiver amps all say pretty much the same thing.

System A speakers or System B speakers 4 ohms-16 ohms. Speakers `A+B 8-16 ohms.

The only speakers I've ever seen are 4,6,and 8 ohm varieties.

 

I know you can run a tower 8 ohm speaker and say 8 ohm bookself speaker at the same time no problem.

But I was wondering and I was thinking you probably can't but still curious could you run a 6 ohm tower and 6 ohm bookself at the same time?

I'm pretty sure it doesn't work 6+6 =12 ohms now.

But I was just confused how you can run a System A+B together without them being 8 ohms tower/bookself.

 

But I never even seen a speaker above 8 ohms before so I was well whats the up to 16 ohms thing about?

Anyone to help clarify this.

 

Thanks.

 

 

 

 

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post #2 of 3
6/26/11 at 9:07pm
Quote:
Originally Posted by mibutenma View Post

Ok most Integrated Amps and Stereo Receiver amps all say pretty much the same thing.

System A speakers or System B speakers 4 ohms-16 ohms. Speakers `A+B 8-16 ohms.

The only speakers I've ever seen are 4,6,and 8 ohm varieties.

 

I know you can run a tower 8 ohm speaker and say 8 ohm bookself speaker at the same time no problem.

But I was wondering and I was thinking you probably can't but still curious could you run a 6 ohm tower and 6 ohm bookself at the same time?

I'm pretty sure it doesn't work 6+6 =12 ohms now.

But I was just confused how you can run a System A+B together without them being 8 ohms tower/bookself.

 

But I never even seen a speaker above 8 ohms before so I was well whats the up to 16 ohms thing about?

Anyone to help clarify this.

 

 

 

No, 16 ohm speakers aren't as common as they once were. Which was quite a long time ago.

 

But you can simplify what they're saying by eliminating the upper end. So, A or B, no speakers with an impedance lower than 4 ohm. For A+B, no speakers with an impedance below 8 ohms.

 

The reason for this is that when you use A+B, the A and B speakers are wired in parallel. If the amplifier isn't intended to drive loads lower than 4 ohms, then for A+B, the two speakers can't be lower than 8 ohms. Two 8 ohm speakers in parallel is 4 ohms. However two 4 ohm speakers in parallel is 2 ohms, which is lower than what the amplifier is designed to handle.

 

That's really all they're saying. You can ignore the 16 ohm reference. They're just doubling 4 and 8 to get 8 and 16 is all.

 

se

 


 

 

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post #3 of 3
6/28/11 at 2:04pm
just mean like mention above. the amp is running the speakers in parallel and not in series. some amps have beefy power transformers and are capable of running 2 4ohm loads no sweat. some amps do,do both and run speakers in series or parallel. running a speaker in series doubles the impedance the amp sees. while in parallel it cuts the impedance in half on what the amp sees. like here for example.

A,B,C: 4-16ohms

A+B: 4-16ohms

A+C: 3-6ohms

A+B+C: 3-6ohms


for the 3-6ohms it means the amp will run it in series doubling the impedance load it sees so it will be seeing a load of 6-12ohms instead. hope this makes sense.
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