Axiom Home Page Forums General Discussion Advice from Axiom Owners A Few Receiver Questions to Power M80v3's

The MRX720 is identical to the MRX1120 except it doesn't have the extra 4 atmos channels amplified.

The MRX520 is a significant step downwards from the other two. If I was in your shoes and the cost of the MRX710 was selling for around the same price, I would say it is far better unit. The 710 was their top end of the intergrated receivers. it also had a far beefier power supply than the 510 unit. In some respects the 710 is a far better design and build than the newer units but just does not support the 11 channel atmos / dts-X. you need to decide if those items are important to you along with pass through of 4K video.