should i change the ohms on my reciever

[dtowntke]

i own a pair of polk rti 8's and an yamaha rxv 663. i always felt like my speakers could use a little more power so i was going to buy an amp but before i do that i noticed i could change the ohms on my receiver from 8 to 6 . i know my speakers nominal rating is 8 ohms but setting the receiver to 6 ohms would give the speakers more power right? so is it a good idea ? or do i have the whole ohms concept wrong

[BStecke]

I don't think you can just "change the ohms" on your receiver. The amp in the receiver is driven at the rate of resistance set by the speakers.

[Blu-Dog]

Originally Posted by dtowntke

i own a pair of polk rti 8's and an yamaha rxv 663. i always felt like my speakers could use a little more power so i was going to buy an amp but before i do that i noticed i could change the ohms on my receiver from 8 to 6 . i know my speakers nominal rating is 8 ohms but setting the receiver to 6 ohms would give the speakers more power right? so is it a good idea ? or do i have the whole ohms concept wrong

What will happen that when reducing the ohm setting, you limit the "rail voltage" for your power outputs.

You have one power transformer in your unit. It divides power to all the output IC's in your receiver, up to the maximum output for the transformer. Lower ohm loads (6 ohms instead of 8, for example) will draw more current from the transformer, possibly causing damage over the long term.

Changing the setting to 6 ohms limits the output, reducing the chance of damage. You may have lower overall sound volume than you're used to, and transient spikes (short, loud passages) will be limited as well - it might sound a bit strange sometimes.

It's best to match the ohm load of your speakers to the rated output of your receiver, if you can.

[ozzman]

Big Daddy was explaining this to me,I have 6ohms Fronts and a Yamaha reciever.
Read this thread it should answer all your questions ,it helped me make a decision

https://forum.blu-ray.com/showthread.php?t=71469

[Twitch9]

Blu-Dog is correct, you should always go by what the speaker rating is and not what your receiver can output. You will cause damage to your amp and will not notice any improvement with your sound. If you want to get more power to your speakers upgrade your receiver or get a power amp to boost the output and clarity of your sound.