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Adding a set of speakers to B Zone


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#1 of 3 OFFLINE   King Kontron

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Posted May 20 2012 - 12:31 PM

Hi. I currently have a set of Yamaha speakers hooked up to the "B Zone" speaker output of my Yamaha RX-V663 receiver (different zone from my home theatre, meant for a different room/area). I want to see if I can hook up another set of speakers in that same room...an older set of Bose 100's. I understand that I will need to hook the speakers up "in series" and understand how to do that. I also know that I need to figure out if the OHM ratings are compatible with the receiver amp or I can have problems. But I don't know how to figure this out. Can someone assist me. The current set of speakers I have hooked up are spec'd out "Power up to 130 watts, nominal impedance 6 Ohms". The other set up speakers I would like to hook up in series with these are spec'd out "Rated 50W IEC, compatible with amps or receivers rated 10-80W per channel, rated 4-8 OHMS". What specification am I evaluating in terms of my receiver to determine whether or not it is OK to hook both these speaker pairs up to that speaker zone? Thank you! Jeff

#2 of 3 ONLINE   Al.Anderson

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Posted May 20 2012 - 12:42 PM

As long as you're hooking them up in series you don't have anything to worry about. The equation for the series connection is a simple addition, so 10-14 ohms (although usually a manufacturer gives one average rating). The Yamaha is rated for 8 ohms, so anything over that is not a problem, the only effect it has is to lower the volume a bit. If you were to connect them is parallel, that would decrease the resistance, and then if you went below 8 ohms you could damage your receiver (or cause it to shut down).

#3 of 3 OFFLINE   King Kontron

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Posted May 20 2012 - 12:45 PM

Makes sense Al, thank you very much! Jeff




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