User manual MARSHALL 1987X

[. . . ] 1959SLP 1987X 2245 `JTM45' 1962 `Bluesbreaker' Owners Manual ! A B C ENGLISH D E WARNING!- Important safety instructions WARNING: THIS APPARATUS MUST BE EARTHED! PLEASE read this instruction manual carefully before switching on. ALWAYS use the supplied mains lead, if a replacement is required please contact your authorised Marshall Dealer. ENGLISH DO NOT attempt to remove the amplifier chassis, there are no user serviceable parts. [. . . ] Note: Though the first input of the first channel is the input that most guitarists use, don't be afraid to experiment. Some guitar players prefer to mix the two channels together by connecting a short, screened patch lead between the second input of Channel 1 and the first input of Channel 2. If you then plug your guitar into the first input of Channel 1 (item 10), you can mix 1 2 the different tonal characters of INPUTS each channel for greater 1 2 flexibility. Indicator The Indicator will be lit when your amplifier is on and will not be lit when the amplifier is switched off. 9. 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. Presence Control Adds higher frequencies to the guitar tone, creating crispness and bite. Turning this up will make the sound more cutting and `present'. 11. Input Jack Connects the guitar to the lower sensitivity input on Channel 1. 5/6. Loudspeaker Outputs These are for connection to an external load, i. e. Bass Control Controls the amount of low frequencies or bottom end in your tone. 12. Conversely reducing the amount of middle in your tone will result in a sharper and thinner guitar sound for a more `scooped' tone. 13. Input Jack Connects the guitar to the lower sensitivity input on Channel 2. 7. Output Selector Matches the amplifier's output to the load impedance. With all-valve amplifiers it is imperative that the amp is connected to a load whilst in operation and that the impedance selected on the amplifier matches the total impedance of the speaker cabinet(s) being used. For example, if the amp is running into a single 16 Ohm cab, the amp should accordingly be set to 16 Ohms. 10. Standby Switch The Standby Switch is used in conjunction with the Power Switch (item 1) to `warm up' the amplifier before use and to prolong the life of the output valves. When powering up the amplifier always engage the Power Switch (item 1) first. This allows the application of the voltage required to heat the valves to their correct operating temperature. After about 2 minutes, when the valves are up to the correct temperature, the Standby Switch can be engaged. (High Tension) which is the high voltage required by the output valves to pass signal (and hence produce sound) is applied. [. . . ] Your amp should be completely powered down before the selector is turned. 5. 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. [. . . ]