Ohms?????

[peppino]

HI all I have a 7.1 setup my receiver is a Harmon Kardon AVR335,I have 2 towers that are Yamaha, 2 side and 2 rear surround Yamaha's, 2 Acoustech Labs 10 inch subs and I have a crappy Center Channel that is a Fluance .All my speakers are 8 Ohms but the yamaha center channel that I'm interested in is 6 Ohms,will that make a difference to my other setup or it should be 8 Ohms all around? Any feedback appreciated Thanks

 

[3db]

Long story short, no problem

HI all I have a 7.1 setup my receiver is a Harmon Kardon AVR335,I have 2 towers that are Yamaha, 2 side and 2 rear surround Yamaha's, 2 Acoustech Labs 10 inch subs and I have a crappy Center Channel that is a Fluance .All my speakers are 8 Ohms but the yamaha center channel that I'm interested in is 6 Ohms,will that make a difference to my other setup or it should be 8 Ohms all around? Any feedback appreciated Thanks

Ohms is a measure of resistance to current flow through a device and with speakers, will vary with the freqiency applied to it. Your HK will have problems with the 6ohm center.

 

[j_garcia]

Your HK will have problems with the 6ohm center.

Did you mean will not have problems? A 6 Ohm speaker is a bit tougher to drive than a comparable 8 Ohm, but most receivers should be perfectly fine with it, especially with just one speaker being 6 Ohms.

 

[speakerman39]

Ohms is a measure of resistance to current flow through a device and with speakers, will vary with the freqiency applied to it. Your HK will have problems with the 6ohm center.

The lower the impedence the more current will flow. Hence, with more current flowing also comes with more heat. Therfore, your HK will not have too much difficulty driving a 6ohm load. If anything it may get a little warmer. Just watch it and if it gets very very hot just turn your volume down a little. However, if all of your speakers were 4 ohm then the HK may run in to some problems with over-heating. Most good receivers can drive 4 ohm loads in stereo BUT can NOT when all channels are driven. That usually results in the protection circuitry kicking in a shutting the receiver down. Hope this helps. Good luck.

 

[3db]

Oi... I said that kinda wrong

Did you mean will not have problems? A 6 Ohm speaker is a bit tougher to drive than a comparable 8 Ohm, but most receivers should be perfectly fine with it, especially with just one speaker being 6 Ohms.

Thanks I meant exactly what you thought; NOT have any trouble .

 

[Svenhook]

Alright, heres a different situation for you

I have a Denon 985 (Same as 2805). Its 100 watts per channel at 8 ohms. Lets say my fronts were 6 ohm speakers, the center was 8 and rears 8. Would it make much of a difference at all? Or say i was just driving the two fronts. How would this affect my system in terms of damaging the receiver and over sound quality, thd % and whatever else might change.

 

[3db]

Guys, stop worrying about 6 ohm speakers

Alright, heres a different situation for you

I have a Denon 985 (Same as 2805). Its 100 watts per channel at 8 ohms. Lets say my fronts were 6 ohm speakers, the center was 8 and rears 8. Would it make much of a difference at all? Or say i was just driving the two fronts. How would this affect my system in terms of damaging the receiver and over sound quality, thd % and whatever else might change.

I have a cheap Technics A/V receiver, DX940 which is driving all PSB speakers,
T45 towers L/R 6ohms
8C center 6 ohms
1B surround 6 ohms

and my cheap old Technics will drive them to more than comfortably loud levels. And you know how good the amp section is on this Technics, not very..

The only time a 6 ohm speaker will get you into trouble is if a.) Their efficiency is less than 87- 88db AND not or, b.) their impedance drops down to lower than 4 ohms across the 20Hz-20KHz spectrum OR, you always drive the amp too hard via volume turned to max. This last part is harder on the speakers than it is on the amp but those output transistors will get mighty warm when pushing out the equivalent of a dc current at clipping . Eventually, the outpust stage will deteriorate and burn up.

Otherwise, your good.