ION V AL VE AMPL A C I IF T Combos & JTM 600 JTM ValveValve Head.
ENGLISH From the Chairman I would like to thank you personally for selecting one of our JTM valve amplifiers. For over thirty three years now my Company has been recognised around the world as one of the leading manufacturers of quality amplification.
ENGLISH WARNING! Please read the following list carefully. A. ALWAYS fit a good quality mains plug conforming to the latest B.S.I. standards where necessary (UK only). B. NEVER attempt to by-pass the fuses or fit ones of the incorrect value. C. NEVER attempt to replace fuses or valves with the amplifier connected to the mains. D. DO NOT attempt to remove the amplifier chassis, there are no user serviceable parts. E. ALWAYS have this equipment serviced or repaired by competent qualified personnel. F.
Switch to the Boost channel which is indicated by the Red L.E.D. Again pickups will obviously influence settings but you will probably find that gain settings of around 5 or 6 are quite adequate, the key however is to increase the master volume level. As our vintage amps didn’t really have a lot of pre-amp gain guitarists used to crank the volume up to be heard which resulted in the natural classic Marshall overdrive roar.
ENGLISH 13) Reverb Control 4) Internal Speaker Output Jack Controls the amount of Reverb on both channels. 14) Volume For connection to internal 16 Ohm speaker. ✪ 5) External Speaker Output Jack For connection to an external 16 Ohm speaker only (such as the Marshall JTM C112 1x 12” extension cabinet). Controls the master or overall volume of the JTM 30. 15) Standby Switch Please Note Controls the H.T. supply to the valves and allows the valves to remain heated when not in use.
Controls the volume of the Boost channel. 11) Bass Control Controls the low end frequencies in the tone of the Boost channel. 1) Mains Fuse ENGLISH JTM 610, 612, 615, 622 and JTM 600 Head Rear Panel Functions. 10) Volume Control Protects the amplifier and mains supply in the event of a fault. 12) Middle Control Controls the middle frequencies in the tone of the Boost channel. 13) Treble Control Controls the upper or treble frequencies in the tone of the Boost channel.
ENGLISH 11) Speaker Output The D.I. Output is via an XLR type connector which allows this system to be run into either (a) a line level balanced input (b) a line level unbalanced input or (c) a low level unbalanced input. For connection to an external 16 Ohm speaker (The Marshall JTM C12 1x12” and JTM C212 2x12” cabinet are designed for use with JTM 60 combos). Please Note On the JTM 600 head this output could drive a second JTM C40 cabinet.
2 8 4 6 2 8 4 6 2 8 4 6 2 8 0 10 VOLUME 0 10 0 10 0 10 3 4 CAUTION! Replace fuse with same type and 5 GAIN VOLUME BASS MIDDLE 6 7 8 9 MAINS FUSE 0 2 10 2 10 TREBLE 10 230V ~50 Hz 160 Watts meme type et le meme calibre Debrancher a la prise secteur avant D,ouvrir. REVERB VOLUME 11 12 13 14 this unit to rain or moisture. This Apparatus Must Be Earthed. Do not open.
