Hughes & Kettner BASSBASE 250 Instructions Manual

Hughes & Kettner BASSBASE 250 Instructions Manual

Bass amplifier / combo amplifier

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BASS AMPLIFIER / COMBO AMPLIFIER
Hughes & Kettner Musical Instruments GmbH Magdeburgerstr.6 6690 St.Wendel
Telefon ( 0 68 51) 20 21
Telefax ( 0 68 51) 48 86

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Summary of Contents for Hughes & Kettner BASSBASE 250

  • Page 1 . : . BASSBASE 2 5 0 BASS AMPLIFIER / COMBO AMPLIFIER Hughes & Kettner Musical Instruments GmbH Magdeburgerstr.6 6690 St.Wendel Telefon ( 0 68 51) 20 21 Telefax ( 0 68 51) 48 86...
  • Page 2 The basic tone of tube technology is most convincing; from a dark warm jazz tone through to an articulate, punchy rock sound, down to the high attack of funk, the Bassbase 250 can do it all. Carefully balanced tone controls with a parametric midrange.
  • Page 3 Potentiometers, function permitting, are center notched for a “memory effect”. Back lighting provides for visibility on even the darkest stages. The Bassbase 250 was engineered to provide you with the opportunity to comfortably create your personal sound. This manual will give you some insights into the Bassbase and familiarize you with it’s features, enabling you to do just...
  • Page 4: Front Panel Control Features

    The intensity of the compression effect inherent in tube amplification is also adjusted with the GAIN control. PLEASE NOTE: Tubes need to reach a minimum operating temperature; a few seconds delay between turning the power on and reaching operational readiness are the norm with the Hughes & Kettner BASSBASE 250.
  • Page 5 +/- 15db. The center frequency is 90hz. MID - THE PARAMETRIC MID CONTROL The Bassbase 250’s mid-range control is semi-parametric, allowing you to freely choose the frequency range which you want to influence. The semi-parametric tone control has two pots, one to determine the frequency range that is to be adjusted, and the other to increase or decrease said frequencies.
  • Page 6: Master Volume

    The center frequency is app. 8khz. (9) FX-MIX: The Bassbase 250 is equipped with an effects loop switched in parallel for external effects devices. Conventional effects loops, switched in series, send the entire signal through the effects device, whereas the Bassbase’s FX-MIX pot allows you to determine the precise amount of the original signal you want to send through an effects device.
  • Page 7 Main power supply switch. The front panel inscriptions will illuminate at the ON position. REAR PANEL FEATURES AND FUNCTIONS Located on the BASSBASE 250’s rear panel, you will find the AC power supply socket for the factory supplied Euro-mains lead. Integrated into the AC power supply socket is the FUSE bracket.
  • Page 8: Cooling Device

    The BASSBASE's power output is 180W at 8 ohms, 250W at 4 ohms.The DYNACLIP circuitry increases the effective power output by about 25%. Do not connect any speaker combination with an overall impedance of less than 4 ohms. COOLING DEVICE: Please note that the cooling device heats up considerably, especially after extended sessions at peak power.
  • Page 9: Servicing And Repairs

    Now turn the FX LOOP back on via the footswitch. The second master volume is regulated with the FX MIX pot on the front panel. You can now switch back and forth between two seperate master volumes. CARE OF YOUR AMP AND WARRANTY CONDITIONS A WORD ABOUT VALVES Valves need to reach a certain operating temperature.
  • Page 10 BASSBASE 250 SIGNAL ROUTING TUNER -w TUNER INPUT PHONES M PHONES FX-SEND -b FX-INPUT FX-RETURN a- FX-OUTPUT J’ FOOTSWITCH M FOOTSWlTCH (FX ON/OFF) SPEARER w EXTERNAL SPEAKER CAB. LINE OUT -w EXTERNAL POWER AMP & CASINETD BALANCED SlGNAL FOR PA...
  • Page 11 The above examples are just that, examples. Your sound is ultimatly dependant on the type of instrument and the playing style you use. Nevertheless, these settings will give you a general impression of the Hughes & Kettner Bassbase 250's sound spectrum.

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