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I've got a Yamaha 65 watt per channel 5.1 amp. My rear cabinets are 4 ohm and my fronts are 8 ohm. I can adjust the amp for 8 or 6 only. I'm a little rusty on my impedence knowledge so someone help me out. Can I add a 4 ohm 1 watt resistor to the rear speakers to create an 8 ohm resistance? Do I have the right math or does someone have a better suggestion?

I definitely don't want to hurt my amp, I just need to get by a little longer until I can get a matched set (4). It's just not in the budget right now. Thanx in advance!
 

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No, Alfred, you need not worry. The lower impedance means that, at any given voltage output (dependent on source voltage, volume setting, and overall reveiver gain), more current will flow as compared to a higher impedance.


The result is a higher wattage output and receiver heat. As long as you don't over-heat, you should be okay. I wouldn't prefer to waste power on a resistor, but do set the receiver to the 6-ohm setting.
 
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