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Guided Tour - Front Panel
1. INPUT (1/4-inch Jack) - Connect your bass guitar to this standard 1/4" unbalanced
jack. This Hydrive Combo Input has been designed to handle the signals from just
about any bass with either passive pickups or with hotter pickups if your bass has
active electronics (that is, if it has a battery).
2. LEVEL (control knob) - This is the overall volume control. For best signal-to-
noise ratio, keep the output of your bass at or near maximum and adjust the Hydrive
Combos Volume to the desired level.
3. COMPRESSION (control knob) - This control determines the amount of
compression (peak signal reduction) by simultaneously adjusting both threshold
and compression ratio (which ranges from 2:1 to infinity [limiting]). At the fully
counterclockwise “Zero” position, the circuitry is bypassed and no compression is
applied. As the knob is raised clockwise (at settings from “1” to “10”), increasing
amounts of compression are applied.
4. COMPRESSION LED – The LED provides a visual indicator of the status of the
compression circuitry. When the LED is off (for example, when the Limiter knob
[see #3 above] is set to “Zero”), no compression is being applied. When flashing,
compression is being applied to the incoming signal at a ratio of approximately
2:1. When steadily blue, the compression ratio is approaching infinity (limiting is
being applied to peak signals). This LED “follows” the incoming signal, changing
continuously as different amounts of compression and/or limiting are being applied.
5. FREQUENCY (control knob)– This control knob is used to set the center cut
frequency for the Shape circuit. The Shape control adds a pre-set equalization curve
with a slight lift in the low frequencies, a cut in the mids and then a slight lift again in
the highs depending on it's setting.
6. SHAPE (switch) – This switch is used to engage the Hartke Shape circuit which
adds a pre-set equalization curve with a slight lift in the low frequencies, a cut in
the mids and then a slight lift again in the highs. For additional control on stage, the
SHAPE switch can be controlled using a Hartke FS2 footswitch.
7. HARMONICS (control knob) – When the Bass Attack Overdrive switch is ON, the
control knob adjusts the amount of overdrive distortion.