USER MANUAL
Hughes & Kettner
VS 250
Stereo
Tube
Power Amplifier
Page 1: ...USER MANUAL Hughes Kettner VS 250 Stereo Tube Power Amplifier ...
Page 2: ...pecial attention to Tubes require a specific operating temperature For this reason a tube device needs a moment after power up depending on the operating environment about 20 seconds or SO until it is completely ready for operation Tubes are sensitive to being jostled or shaken when hot After use allow the unit to cool down for a few minutes before transporting it Avoid subjecting it to strong vib...
Page 3: ...resence With tube amplification the higher frequencies PRESENCE are most effectively controlled at the power amp stage This frequency range plays a major role in determining the character of the guitar sound and its ability to cut through The intensity of the PRESENCE control depends to a great degree on the guitar sound itself a heavily overdriven sound with a great deal of overtone energy will r...
Page 4: ...e this switch will be on It is good practice to switch each channel of the VS 250 to STANDBY both before powering up and before switching off BACK Power Cord Jack This jack accepts the 110 120 volt power cord supplied with your unit If you are on tour in Europe this jack will accept a 220 240 volt power cord See Main Fuse and Voltage Selector below Main Fuse For overseas use change the fuse to mat...
Page 5: ...erdriven a guitar sound you use Presence Select Footswitch Connect a commonly available on off footswitch to this jack and you can alternate between PRESENCE 1 and PRESENCE 2 If only one footswitch is connected both channels will be switched simultaneously Ventilation Heat generated by the tubes in the VS 250 is transferred to a heat exchanger which is cooled in turn by an extremely low noise fan ...
Page 6: ...onnect two 16 ohm cabinets to one channel please connect one of the cabinets to the 8 ohm input and connect the second cabinet to the first in parallel Technical Specifications Tubes each channel Driver stage 1 x ECC 83 or 12ax7 or 7025 1 x ECC 82 or 12AU7 Power stage 4 x EL 84 Output per channel Pentode mode 50 watts RMS Triode mode 25 watts RMS Input sensitivity 300 mV to 10 volts Presence contr...
