Ohhhhhhhms?!

[cannotcomplain]

Overall, I am a little confused by ohms (go figure). If the amp spec is 130 watts RMS at 8 ohms, and the speaker has a recommended amp power of 15-120 watts and power handling at 120 watts RMS, AND is 6 ohms, are the speakers good match, ie MA C280's with Yamaha 2065? That is, do the watts specified on a 6 ohm speaker jive with the watts for the 8 ohm spec on the amp? I am not sure that comparison is apples to apples. Please help.

 

[bandphan]

Overall, I am a little confused by ohms (go figure). If the amp spec is 130 watts RMS at 8 ohms, and the speaker has a recommended amp power of 15-120 watts and power handling at 120 watts RMS, AND is 6 ohms, are the speakers good match, ie MA C280's with Yamaha 2065? That is, do the watts specified on a 6 ohm speaker jive with the watts for the 8 ohm spec on the amp? I am not sure that comparison is apples to apples. Please help.

http://en.wikipedia.org/wiki/Ohm's_law

 

[JerryLove]

An amp will have a different power output at different Ohms. Though the actual resistance of a speaker is not constant, the "8ohm" or "6ohm" gives you an idea.

An ideally built amp will put twice the power at 2ohms it does at 4, and twice at 4 what it does at 8. For most this is not the case. For some, low ohm numbers can be damaging because the amp isn't designed for the current.

 

[sparky77]

Theoretically at 6 ohms, your amp would put out 173 watts. You don't have to worry about overpowering the speakers unless you like to listen at insane volume levels, and you'll probably hear distortion before you get to the level to damage your speakers. Most 8 ohm receivers can handle a 6 ohm load pretty well, but, if you amp goes into protection mode, you may want to find one rated to run 4 ohm loads.

 

[TLS Guy]

Theoretically at 6 ohms, your amp would put out 173 watts. You don't have to worry about overpowering the speakers unless you like to listen at insane volume levels, and you'll probably hear distortion before you get to the level to damage your speakers. Most 8 ohm receivers can handle a 6 ohm load pretty well, but, if you amp goes into protection mode, you may want to find one rated to run 4 ohm loads.

Only if the voltage does not drop, and if it is a lousy Chinese receiver it will.

However the ohm specification of speakers is pure fiction. Unless there is an impedance curve to view, assume every decent speaker is four ohm and you won't go far wrong.

 

[lsiberian]

Only if the voltage does not drop, and if it is a lousy Chinese receiver it will.

However the ohm specification of speakers is pure fiction. Unless there is an impedance curve to view, assume every decent speaker is four ohm and you won't go far wrong.

Well I wouldn't say pure fiction. But I do agree it's better to be safe than sorry.

 

[fredk]

assume every decent speaker is four ohm and you won't go far wrong.

But, that would put all those speakers into the 'difficult to drive' category and everyone would have to go out and buy separates. Best we stick to fiction.

 

[TLS Guy]

But, that would put all those speakers into the 'difficult to drive' category and everyone would have to go out and buy separates. Best we stick to fiction.

A speaker being four ohm, does not put it in the difficult to drive category by that criteria alone.

Anyway an output section that can't drive a four ohm load is not worth building. Just a waste of precious resources.

 

[3db]

A speaker being four ohm, does not put it in the difficult to drive category by that criteria alone.

Anyway an output section that can't drive a four ohm load is not worth building. Just a waste of precious resources.

yup, phase angle,senstivity, and teh frequency in which the dip occurs all play revelvant factors. There are some 8ohm speakers out there that are more difficult to drive than 4 ohm speakers because of low senstivity and a large phase angle. 4 ohms is analogous to reading the title of a book..thats about it.

 

[AVRat]

The short answer is that the 2065 will have no problem driving the MA C280s.