Crank It for Denon & Marantz is a free iPhone app developed by Solodigitalis Inc. It allows you to control compatible Denon & Marantz receivers with maximum responsiveness. This app was specifically designed to provide precise and fast volume control for your receiver.

With Crank It, you can easily change the volume by sliding your finger up or down anywhere on the screen, or you can use a preset for quick adjustments. In addition to volume control, the app also allows you to change the input source, toggle mute, and power the main zone and zone 2 on or off. You can even change the MultiEQ setting, such as turning off Audyssey.

It's important to note that Crank It only supports receivers made by Denon & Marantz that have an IP address and are listening on port 23. This typically includes receivers made from 2013 onwards.

While the app has built-in functionality to prevent accidental volume changes, it's essential to remember that no software is perfect. When using Crank It, you assume all responsibility for the volume levels and other functions set on your receiver, including those adjusted by the app.