Samson 112C Benutzerhandbuch

14

The Hartke Systems Hydrive Combos Bass Amplifier 

gives you enormous control over shaping the sound 

of your bass, using a process called equalization.  To 

understand how this works, it’s important to know 

that every naturally occurring sound consists of a 

broad range of pitches, or frequencies, combined 

together in a unique way.  This blend is what gives 

every sound its distinctive tonal color.  The Hydrive 

Combos EQ controls allow you to alter a sound by 

boosting or attenuating specific frequency areas—

they operate much like the bass and treble controls 

on your hi-fi amp, but with much greater precision.
The 112C, 115C and 210Coffer standard  Bass 

and Treble controls, plus seven bands of graphic 

equalization. This extended, dual stage equalization 

circuit allows you to tailor the mid-band with precise 

control and then boost and cut the bottom and top.  
The Bass knob affects the low-frequency area at 

100 Hz, and provides approximately 15 db of boost 

and attenuation. The Treble knob  affects the high-

frequency area at 8 kHz, and provides approximately 

15 db of boost and attenuation. The Graphic Equalizer 

points are at 80 Hz, 160 Hz, 315 Hz, 630 Hz, 1.25kHz, 

2.5kHz and 5kHz and the sliders provide 12 db of 

boost and attenuation. We carefully selected these 

frequency areas because they have maximum impact 

on bass signals.    For example, the Bass (100 Hz) 

control affects the very lowest audible frequencies (in 

fact, most humans cannot hear below 20 Hz), while 

the High (5 kHz) control affects the “twang” of a bass 

string.
When a Bass or Treble knob is in its center detented 

position (“0”), it is having no effect.  When it is moved 

right of center, the particular frequency area is 

being boosted; when it is moved left of center, the 

frequency area is being attenuated.  When a Graphic 

Equalizer slider is in its center detented position (“0”), 

it is having no effect.  When it is moved up above 

center, the particular frequency area is being boosted; 

when it is moved down below center, the frequency 

area is being attenuated. Turning all EQ controls up 

the same amount will have virtually the same effect 

as simply turning up the Volume; conversely, turning 

them all down the same amount will have virtually 

the same effect as turning down the Volume.  Both 

approaches are pointless (after all, that’s why we gave 

you a Level control!)