Marshall Gateway is an Android application developed by Marshall Amplification plc, designed for use with Marshall CODE Series amplifiers. The app allows you to remotely control and manage your amplifier settings via Bluetooth Classic and LE connections. It also lets you stream audio from your music library directly to the amplifier.

The app is perfect for music enthusiasts who want to create and manage presets that can be sent to CODE when connected. It works independently of CODE, so you can create your presets and manage them even when you're not connected to the amplifier. The app requires Android 4.4 or later to work seamlessly.

Overall, Marshall Gateway is a fantastic app that provides an amazing music experience. With its user-friendly interface and Bluetooth connectivity, it's a must-have for anyone who owns a Marshall CODE Series amplifier.