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How to connect multiple sets of speakers?

 I am currently using a Denon AVR - 1905 for my receiver. I am using it like a 2.1 system. I have my mains on the speaker A channel and the other 3 pairs of speakers on the B channel.  The individual sets of speakers and controlled by a speaker selector.  At moderately high t high volumes I get a very loud bass rumble.  I was explained to me that each channel has it's own amplifier in my receiver.  Since I have 3 sets of speakers on 1 channel the Ohms have gone from 8 ohms all the way down to 2 ohms because of the 3 total sets on one channel.  Short of get a whole new amplifier setup(Yes, I eventually will do this, just not able to do it now), what is the best way to connect the sets(4 total)? 2 sets per channel with 2 speaker selectors?  I appreciate any help on this matter!!

Kevin McAlley
ksmcalley
yogiboy's avatar
yogiboy
5,700 posts
 
Here ya go!!
https://geoffthegreygeek.com/ufaqs/whats-difference-speakers-series-parallel/
reubent
7,003 posts
 
@ksmcalley - Do the speakers on the "A" channel sound OK? Do the speakers on the "B" channel sound OK if you are only playing one pair of those speakers at a time by un-selecting the other pairs of speakers using your speaker selector? What if you play 2 pair of speakers on the "B" channel? Is it only when you play all 3 pair of speakers on the "B" Channel that you have the issue?

Is this a "whole house" music setup where you have the 4 sets of speakers in 4 different areas of your home? Please explain where the speakers are located, and how you use them. It may help with recommendations. Also, your Denon AVR-1905 is a multi-channel home theater receiver. Are you using it for multi-channel HT in the main room? In other words, do you have a 5.1 channel HT setup (5 speakers plus a subwoofer - L&R front, L&R rear, center channel and a subwoofer) in the main room and use the speakers on "A" channel as the front L&R speakers? Or are you only using a single pair of speakers in the main room?


imhififan's avatar
imhififan
2,204 posts
 
Since your AVR has 7 channels of amplification, connect one pair of speakers to 'speaker B', one pair to surround L and R, one pair to surround back L and R.
Using '7.1 channel stereo' mode to activate all speakers.
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