User manual MARSHALL JCM 2000 DSL 50

[. . . ] - Important safety instructions WARNING: This apparatus must be earthed! A PLEASE read this instruction manual carefully before switching on. B ALWAYS use the supplied mains lead, if a replacement is required please contact your authorised Marshall Dealer. C NEVER attempt to by-pass the fuses or fit ones of the incorrect value. D DO NOT attempt to remove the amplifier chassis, there are no user serviceable parts. [. . . ] To prolong the life of the valves it is always advisable to switch on the Mains Power Switch (item 1) about 2 minutes before switching on the Standby (item 2). On switching off, the Standby should always be switched before the Power Switch. The standby facility is particularly useful between sets and before playing, as it allows you to keep the valves operating at a functional temperature but without any sound being produced. 10. Channel A Controls the reverb level on Channel A. Ultra Gain / Channel B 11. Volume Governs the volume level of Channel B. 12. Lead 1 / Lead 2 Switch The DSL 100 and DSL 50`s Channel B features two modes. The first, Lead 1, gives an open high gain crunch, with traditional Marshall characteristics, similar to a hotrodded JCM 800 2203 master volume. The Lead 2 mode however gives a mid-boosted tone coupled with even higher gain possibilities. 3. Deep Switch The Deep Switch adds a tuned or resonant bass boost to your sound, increasing bottom end thud, without making your tone woolly around the all important low end. 13. Gain Controls the gain level for Channel B. As the amount of gain increases so will the distortion level in your sound. 4. Presence Control Adds higher frequencies to the guitar tone, creating crispness and bite. Turning this up will make the sound more cutting and in your face. 14. LED Indicates when Channel B has been selected. 5. Treble Control Controls the high frequencies of the guitar tone, making your guitar sound brighter when increased. 15. Channel Switch Selects Channel A or Channel B. 16. LED Indicates when Channel A has been selected. 6. Middle Control Dictates the middle register of the amplifier. Turning this up will make your guitar sound fatter. Conversely reducing the amount of middle in your tone will result in a sharper and thinner guitar sound for the classic "scooped" tone. Classic Gain / Channel A 17. Volume Governs the volume level of Channel A 7. Bass Control Controls the amount of low frequencies or bottom end in your tone. 18. [. . . ] Send For connection to the input of an external effects processor. 11. Mains Input Your amp is provided with a detachable mains (power) lead which is connected here. The specific mains input voltage rating that your amplifier has been built for is shown on the back panel. Before connecting for the first time, please ensure that your amplifier is compatible with your electricity supply. [. . . ]