Quote:
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.