Moved into a home with three sets of in-ceiling speakers. The landlords said they used the system before and it worked great, they gave me a link to the receiver they used. I got a different receiver from Amazon and when I plugged it in to all the speakers and tried the FM radio, I had to max out the volumes as much as possible to make them softly audible. What is different about my receiver vs. theirs that I got an incorrect type?

Theirs: https://www.denon.com/en-us/product/av-receivers/avr-1609 / https://www.amazon.com/Denon-7-1-Channel-Multi-Zone-Discontinued-Manufacturer/dp/B001BKLC50

Mine: https://www.amazon.com/dp/B08428KFLB?psc=1&ref=ppx_yo2ov_dt_b_product_details