You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
There are a couple of inherent problems with doing this, both power related. The first is the battery voltage is quite high at 15.5 - 16 volts. You would need to find audio equipment designed to operate from 16 volts (as opposed to the more common 13.8 volts). Also the available power from the low voltage system is quite limited due to the tiny lithium battery that is now standard. Some folks here have reported denied warranty repairs on the low voltage battery and related components, with a very high power audio systems installed. Be very careful.