Unless you have a tube-amp, the speaker impedance is not matched to the amplifier impedance.want to match then to my Yamaha receiver best power transfer @ 8 ohms according to manual.
Yamaha amplifiers are solid state with transistors, not with vacuum tubes and a tapped output transformer.The solution for matching the speakers is to read the label and connect the speakers to the appropriate tap on the amplifier. If you use an impedance meter and find that the speaker impedance is 6.738 ohms, then what? Probably the amplifier has an 8 ohm output, and the adjustable matching transformer is expensive. I have used a variac for impedance matching, and it does work. and it made no audible difference at all.
My matching arrangement was rather unique, matching up to a permanently installed string of speakers that normally connected to the Jukebox in a bar. For whatever reason the impedance at the connection point we were given was about 500 ohms, and the amplifier output was 8 ohms. Without the variac the volume was way too low for those who wanted band sound coming from the speakers. So the full winding went across the 500 ohm speaker line and the amplifier 8 ohm output went between the low end of the variac and the wiper. We started at half way up and reduced the input connection until the sound was what they wanted. The variac was finally mounted in the back of the music amplifier speaker enclosure and it worked well for the six week gig the band had at that bar. And my reputation as a problem solver was made.Yamaha amplifiers are solid state with transistors, not with vacuum tubes and a tapped output transformer.
They can drive 2 ohm speakers or 8 ohm speakers as shown in the owner's manual.
The output impedance of a modern amplifier is at the most 0.04 ohms so it is an AC voltage source for a speaker. You do not match the speaker impedance to the output impedance of the amplifier.
? mono . . . from certain distance anything surround eventually comes such so there's no much difference -- i've noticed that the GSM codec mixes the L R better than anything else i've tried (wonder what magic they do there)The variac was finally mounted in the back of the music amplifier speaker enclosure
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by Steve Arar
by Rushi Patel