The PMA-50 Compact Digital Amplifier, HEOS Wireless Amplifier and the PMAA100 100th Anniversary Integrated Amplifier are well-rated Denon amplifiers. Each of these amplifiers has at least a four-star rating, according to Amazon.com
The PMA-50 Compact Digital Amplifier has a 4.4-star rating. It features advanced AL32 processing, 50 watts+50 watts, USB-B input for computers, Bluetooth compatibility for smartphones and tablets, and an amp gain selector for listening to headphones.
The HEOS Wireless Amplifier has a 4.4-star rating. It is a multi-room sound system that plays music from anywhere in a home using a wireless home network. It plays music from smartphones, tablets and USB drives.
The PMAA100 100th Anniversary Integrated Amplifier has a five-star rating. It has cast iron footing for less vibration and better sound quality, UHC-MOS Single Push-Pull output circuit and twin transformers with a leakage cancelling mount.