Table of Contents
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Contents
INTRODUCTION
BEFORE OPERATING...
1.0 CONNECTIONS AND CONTROL FEATURES
2.0 STANDARD SETUP / CABLE CONNECTIONS
4.1 THE INPUT AND VOICING SECTIONS..
Congratulations and thank you for purchasing the HUGHES & KETTNER BassBase 600!
The BassBase 600 represents our goal of designing the ultimate bass amp, featuring the cutting edge of
contemporary amplification technology. In respect to performance, sound quality, flexibility and workmanship,
we made our dream of the perfect bass amp a reality (and hopefully yours too).
In addition to all the tried-and-true features of classic bass amps, the BassBase 600 offers many innovative
details that will help you translate your ideas about sound into music.
In spite of its wealth of features, the BassBase 600 is designed to be straightforward to understand and easy
to operate. This manual will help you exploit the many options your new amp offers.
We wish you much enjoyment and success with your BassBase 600!
BEFORE OPERATING....
Check the voltage rating displayed next to the amp's AC socket. Make sure it matches your local AC current
before you plug the amp's power cord into an AC outlet.
Place the amp on a sturdy, secure base (no, a stack of empty beer crates won't do). If you install the amp in a
rack, make sure the amp is supported from the rear, or is mounted at the bottom rack space.
HUGHES & KETTNER is not liable for damage to the amp due to incorrect installation in racks.
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Table of Contents
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Summary of Contents for Hughes & Kettner BassBase 600
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Page 1: Table Of Contents
Contents INTRODUCTION BEFORE OPERATING... 1.0 CONNECTIONS AND CONTROL FEATURES 2.0 STANDARD SETUP / CABLE CONNECTIONS 3.0 SELECTING EQ SETTINGS/MIDI 4.0 OPERATING THE BASSBASE 600 4.1 THE INPUT AND VOICING SECTIONS.. 4.2 THE VARIMETRIC EQs. 4.3 THE NOTCH FILTER 4.4 THE BASSBASE 600 AND FX PROCESSORS 4.5 THE BASSBASE 600 AND MIDI 4.6 THE ACTIVE CROSSOVER 5.0 SERVICE AND PREVENTIVE MAINTENANCE... -
Page 4: Selecting Eq Settings/Midi
For safety purposes, the BassBase 600's power amp is exclusively equipped with Speakon jacks and female XLR jacks. (In some cases, you may need to employ an adapter cable.) NOTE: Under no circumstances should you use 1/4" plugs for connecting speaker cabinets to the BassBase 600;... -
Page 5: Operating The Bassbase 600
NOTE: To use either the Stageboard or MIDI to operate the BassBase, please ensure that all switches on the front panel of the unit itself are OUT (not depressed). Alternatively, to operate the BassBase using either the front panel switches or MIDI, ensure the Stageboard is either unplugged or completely switched off (that is, no Stageboard LEDs are on). -
Page 6: The Varimetric Eqs
Use the BASS and TREBLE controls to dial in the basic tone. Note that the TREBLE control is situated before the tube stage in the signal chain, yielding smoother harmonic overtones. If the CLIP LED illuminates when you dial in higher TREBLE settings, simply adjust the GAIN control to a lower level. 4.2 THE VARIMETRIC EQs Handle the VARIMETRIC EQ sections as you would a semi-parametric EQ. -
Page 7: The Notch Filter
Even though you handle the VARIMETRIC the same way you would a conventional semi-parametric EQ with its fixed filtering, it is a much more sophisticated sound-shaping tool. The filters, rather than being geared to a fixed frequency range, are variable, enabling you to fine-tune your tone for a truly musical result. This frequency diagram depicts the effects of the VARIMETRIC EQ on the lower-midrange. -
Page 8: The Bassbase 600 And Fx Processors
- Turn the NOTCH FILTER LEVEL control all the way up so you can clearly hear the attenuated frequency. - Turn the FREQUENCY knob until you locate the frequency responsible for the sympathetic vibrations; the NOTCH FILTER will suppress it. - Now turn the LEVEL control to just below the point where the resonance sets in, thus ensuring that the filter has a minimal effect on the overall sound. -
Page 9: The Bassbase 600 And Midi
TIP 1: If you choose not to connect a signal processor/effects device to the FX loop, you can connect another instrument or tape deck. For instance you could connect a guitar, keyboard, drum machine, tape player, etc. for rehearsals or practice sessions. Connect the additional device as described above and use the FX-MIX knob as the volume balance control between your bass and the external signal source. - Page 10 The BassBase 600 is equipped with an active crossover. This enables you to biamp your system. The output signal is separated into two frequency ranges and sent to two different power amps and then on to the speaker cabinets. Always use the BassBase 600's integrated power amp for bottom-end amplification. The biamping capability provides enhance flexibility, additional speaker cabinet options and even higher stage volumes.
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Page 11: Service And Preventive Maintenance
5.0 SERVICE AND PREVENTIVE MAINTENANCE The BassBase 600 will not require service of any type for many years. Tube fatigue is normal after several thousand operating hours and becomes apparent through treble loss or increased microphonics (audible as a ringing noise reproduced by the tweeter). Use a soft, slightly damp cloth to clean all metal parts. - Page 12 - The HI-CUT button is in the ON position although you are not running a biamped rig. Switch the HI-CUT off (button not depressed). E4) Using the Stageboard, you are unable to turn off the VARIMETRIC EQ or the FX LOOP, or you can only activate VARIMETRIC B: - The EQ or FX LOOP front panel selector switches were inadvertently left in the ON position.
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