Hartke B Bass Combo Série Mode D'emploi page 9

Guided Tour - Front Panel
tion (that is, flat response). As it is turned clockwise from the "0" position, the frequency area is
boosted; as it is turned counterclockwise from the "0" position, the frequency area is attenuated.
For more information, see the "Using Equalization and Shape" section on page 8 in this manual.
5. Mid EQ control - This control provides approximately 15 dB of cut or boost at 830 Hz, with a
peak (bell) curve. When the knob is at the 12 o'clock ("0") position, there is no boost or attenu-
ation (that is, flat response). As it is turned clockwise from the "0" position, the frequency area is
boosted; as it is turned counterclockwise from the "0" position, the frequency area is attenuated.
For more information, see the "Using Equalization and Shape" section on page 8 in this manual.
6. High EQ control - This shelving control provides approximately 15 dB of cut or boost at 5
kHz. When the knob is at the 12 o'clock ("0") position, there is no boost or attenuation (that is,
flat response). As it is turned clockwise from the "0" position, the frequency area is boosted; as
it is turned counterclockwise from the "0" position, the frequency area is attenuated. For more
information, see the "Using Equalization and Shape" section on page 8 in this manual.
7. Line Out - This standard unbalanced 1/4" jack provides a line-level post-EQ and post-
Volume (and, in the B600 and B900 models, post-Shape) output signal from the B Series.
You'll usually use this to connect the B Series signal to a line-level input when interfacing with
PA systems or recording mixing consoles. The signal from this output is the same as that from
the Preamp Out on the rear panel (see #3 on page 5).
8. Headphones jack - Connect any standard stereo headphone (600 ohms or less) to this stan-
dard 1/4" stereo jack. When a plug is inserted into the headphone jack, the speaker output is
disconnected, allowing you to use your B Series as a practice amplifier. The level of the signal
sent to the headphones is determined by the setting of the Volume knob—at the point where a
connected speaker would clip, the headphones will clip.
WARNING: Because even the smallest B Series amplifier is capable of generating extreme-
ly high headphone signal levels, always start with the Volume knob at minimum and
then slowly turn it up. In particular, a clicking sound is an indication of distortion and pos-
sible damage to the headphones (and/or your hearing!); don't let things get to that point!
9. Power switch - Use this to power the B Series on or off. When powered on, an LED inside this
switch is lit.
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