[. . . ] I would personally like to congratulate you on your purchase of this next-generation Marshall MG amplifier. As a musician myself, I fully understand what it takes to perform live in a band situation. [. . . ] This switch allows you to change between the amp's two channels, Clean and Overdrive, via the front panel. By adjusting the Treble control you can add or take away the higher frequencies in your guitar tone. By increasing the amount of treble you will make your tone brighter, ideal for more percussive playing styles. This control lets you add a lush reverb to the selected channel, from a subtle hint to cavernous and all points in-between. If you want to jam to your favourite MP3, CD or tape track, merely connect the line out or headphone output of your player here, adjust the volume of your player to match that of your guitar and you've got the perfect `playalong' practice system. Simply turn up the Gain control until the required amount of distortion is achieved. The louder this channel is set, the `looser' the amplifier will sound and feel. This highly effective tone control works by modifying the mid-range (body). The tone can range from traditional and woody sounding (setting at 10), to balls-to-the-wall (setting at midway), to aggressive, `scooped' and modern (setting at 0). connection of headphones will automatically mute the internal speaker. The Channel switch will light up when your amplifier is turned on and will not be lit when the amplifier is switched off. Note: The specific mains input voltage rating that your amplifier has been built for is shown on the back panel. [. . . ] Please ensure the amplifier is switched off and unplugged from the mains electricity supply before being moved. Whilst the information contained herein is correct at the time of publication, due to our policy of constant improvement and development, Marshall Amplification plc reserve the right to alter specifications without prior notice. [. . . ]