Can I use 4 ohm rears on an 8/6 ohm 5.1 reciever?

[Ajay]

Hello all, looking for some assistance here.

Currently have

Yamaha RX-V650 reciever ( switch for variable impedance for both 8 and 4 ohms (mains) with 8 and 6 ohms (rears and centre) respectively.

Klipsch F2 mains (8 ohms)

Klipsch Synergy 12" sub

Kef cresta 20 centre (8 ohms)

I want to move my old mains ( Rock Solid Sounds Monitors - 4 ohms to the rear)

Is this possible?

If so should I switch the impedance to the lower level?

Thanks in advance.

 

[bandphan]

keep your curent settings. No worries

 

[GlocksRock]

Your rear speakers won't see so much action that it would cause any problems with your current receiver and settings.

 

[Ajay]

Your rear speakers won't see so much action that it would cause any problems with you

I do use the 7 channel stereo option alot, especially with TV that is not 5.1. The rears do act as smaller mains in this application. Would this still be considered a light load? I do like to crank it up! Thanks

 

[Sheep]

As long as they are not running bass, they're not going to see much wattage.

SheepStar

 

[TLS Guy]

I do use the 7 channel stereo option alot, especially with TV that is not 5.1. The rears do act as smaller mains in this application. Would this still be considered a light load? I do like to crank it up! Thanks

You really need to know the impedance curve of those speakers. If you crank it you may well have a serious issue with output stage amp failure. Again, the myth that the power is all in the sub range is perpetuated. There is in fact little power below 60 Hz. My amps that power the drivers cutting in below 80 Hz never break a sweat. The real power is between 60 and about 1500 Hz. The power divide is 400 Hz, although speakers that drop the impedance down to 4 ohms below 400 Hz, and that's a lot, will draw double the power below the impedance drop.

You don't know those speaker don't drop below 4 ohms. Unfortunately a manufacturers single number impedance rating, means very little. Honestly in this day and age the manufacturers have no business putting anything out that will not drive a four ohm load.

 

[Ajay]

Thanks for the update. I tried using the 7ch mode with the impedance set at 8ohms and it started to get hot, my ears said the amp is fine however my nose said the contrary. When I switched to the 6 ohm level it got a little better, this was at about -10db for 20 minutes, still I packed it in and grabbed the matching rears on clearance at BB. Unfortunately Rock Solid sounds are long defunct and I cant find any specs ( the original manual is probably in my parents garage somewhere!) Any how thanks for the help all of you, I 'll be posting a new question soon as I want to use my Yamaha EQ/SpectrumAnalyzer with my current receiver that does not have a pre out main in. Ez

 

[TLS Guy]

Thanks for the update. I tried using the 7ch mode with the impedance set at 8ohms and it started to get hot, my ears said the amp is fine however my nose said the contrary. When I switched to the 6 ohm level it got a little better, this was at about -10db for 20 minutes, still I packed it in and grabbed the matching rears on clearance at BB. Unfortunately Rock Solid sounds are long defunct and I cant find any specs ( the original manual is probably in my parents garage somewhere!) Any how thanks for the help all of you, I 'll be posting a new question soon as I want to use my Yamaha EQ/SpectrumAnalyzer with my current receiver that does not have a pre out main in. Ez

Thanks for the feedback. You know those rock solids have a minimal impedance of four ohms or less, and most good speakers will. If you like them, keep them until you have a unit with amps comfortable driving four ohm loads.