“How many omhs should i put on my 8020 for two bookshelves speakers with a 100 watt subwoofer?”
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First you need to check the 8 ohm/4 ohm specs of the receiver. Speakers present a variable load to the receiver that can vary depending on the type of music and volume played. Think of a car in motion on a flat highway vs a steep grade. The amps output will vary according to this load. The subwoofer has its own amp so it does not figure into this equation. If you own the speakers already, you should be able to get their ohm rating on the back or the spec sheet. If the amp has a 4/8 ohm selector, the choice is obvious if you know the speakers rating. If the speaker is 6 ohms, then you have to consult the amps manual for the correct setting. If you are a loud listener, I would recommend an 8 ohm speaker with high efficiency rating 90 or greater.
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