I have used 3 and 4 speaker ceiling units and they are excellent. The device is quite light overall, but the speakers are really powerful. The highs and mids are extremely accurate and the lows are really good considering the size of the speakers. I've used them in a church shrine with 15-20 foot ceilings and the sound overlaps really well. I've also used them in a church meeting room with a ceiling only 7 feet high and the sound and range were just as good. They come with hardware to attach them to the above structure if you don't trust the strength of the false ceiling, but I've never been in that position. Simply pull the cable through, insert the speaker into the slot in the ceiling, plug it in and off you go. Some of them are rated for 70 volt systems instead of 8 ohms, so be careful when buying. This one is tuned to 8 ohms.
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