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Want to add 2 more speakers to stereo amp- CXA80

I have a Cambridge CXA80 amp that drives my two Dynaudio DM 3/7 towers. Amp and speakers are both 4 ohm 120W per channel.
(the amp can play 8 ohms too)
 amp specs below:
https://techsupport.cambridgeaudio.com/hc/enus/article_attachments/202201702/CXA80_Technical_Specif...

I’m thinking of adding 2 ceiling speakers to the kitchen that is right next to the living room that I listen to the towers in. The ceiling speakers are Dyn, but they are listed at 8/5 ohm....
https://www.dedicatedaudio.com/collections/in-wall-on-wall/products/dynaudio-p4-c80-in-ceiling-louds...

Will this set up compared to the 4 ohm connection with the tower speakers get squirly? I may want to just listen to the new ceiling speakers without the towers, but sometimes may want all 4 playing...
Can any of you describe what will happen SQ wise with the ceiling speakers with higher ohms, as well as ohm wise when listening to just the 2 new ceiling speakers, vs all 4? ( and will this set up decrease the SQ on the towers when just the towers are playing?

Thanks!
rmiller01

Showing 3 responses by yogiboy

yogiboy's avatar
yogiboy
5,818 posts
 
If you want all 4 speakers playing together the load on your amp will be to low and the amp will most likely shut down. That CXA80 has preamp outputs. You can run a power amp and hook up the ceiling speakers to that amp and there will be no problem using all the speakers together!

Something like this for the ceiling speakers would work!
https://www.parts-express.com/Dayton-Audio-APA150-150W-Power-Amplifier-300-812
yogiboy's avatar
yogiboy
5,818 posts
 
You will have no problem if you play one room at a time. If you want to play both rooms at the same time you will have a problem.
The reason I showed you that Dayton amp is because it has a volume control so you can match the volume on both sets of speakers when you want to play both at the same time.
You can use any power amp but you should find one with a volume control!
yogiboy's avatar
yogiboy
5,818 posts
 
Most any amp that you use will have a problem running two sets of speakers at the same time. If you can find ceiling speakers that are rated at a 16 ohm load then you can use all of the speakers at the same time. The only other option is if you wire the speakers in series. Doing that will double the impedance load on the amp. Like I originally told you if you use one pair of the speakers at a time you will not have problem!
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