heres a nice question

[smuggs]

i have a pair of ma br5's which are 6ohms but i only ever hear av and hifi amps saying what power it has with 8 or 4 ohms going in why never 6.

 

[Anonymous]

maybe because you can easily extrapolate between the two (approx)?

 

[shooter]

Where's Sir Isaac Newton when you need him!!

 

[plastic penguin]

chainrock:maybe because you can easily extrapolate between the two (approx)?

I've never payed too much attention of the ohms, more importantly, for me, is the db's.

 

[shooter]

Ohm's and db's are chalk & cheese,

 

[Anonymous]

Whatever the spec says....its only a nominal value. plug them into an 8 Ohm socket and you will be fine. The value will vary greatly depending on frequency. I have sseen specifications for 8 ohm speakers where the impedence drops as low as 2 and as high as 30 ohms. Nominal value for these was 8 ohms.........

 

[jaxwired]

One reason they give the 4 ohm number is to let the buyer know that the amp is capable of driving low ohm speakers. Some amps cannot safely drive low ohm loads. By giving the 4 ohm number, they are communicating that this is safe. And if 8 are 4 are safe, then 6 is fine. Also, 8 and 4 ohm speakers are more common than 6 ohm rated speakers. Of course, speaker impendence fluctuates and isn't a fixed number anyway...

 

[Frank Harvey]

Untrue.

Just because a manufacturer states a power rating for a 4ohm load, it doesn't necessarily mean that the amplifier will drive a 4ohm load safely. There are many amplifiers, especially under £200 that will state a 4ohm power rating, but that is done to give a higher output rating, which is quite misleading. Generally, I find 2 channel amplifiers over £500 (prefereably nearer £1k) and AV amplifiers from around £1,000 are required to begin to drive 4ohm speakers properly.