Hi, I recently purchased the AVR X 1800 and the Denon iPhone app version 3.12.1. I don't use it much, but all the main functions of the receiver work on my iPhone.
Yes, absolutely. When you set it up, you can configure any number of speakers you want to use. Please note that surround sound won't work with two speakers, but a simple stereo setup is available for you.
The manual for the Denon AVR-X1800H AV receiver is available in several languages, including Italian. You can find the full manual on Denon's official website or download it from sites such as ManualsLib.
According to the manufacturer's specifications, this receiver can output 145 watts per channel at (6 ohms, 1 kHz, THD: 1 %, 1 channel driven). This information is therefore correct.
However, other specifications can of course always arise on such test pages as soon as other loudspeakers etc. are used.