9
400RB Series
Front Panel Controls
1-Balanced Direct Out:
An electronically balanced output, that you can run
to your P.A. system.
2-Pre/Post EQ Button:
Selects the direct out signal from before or after the
EQ.
3-Input:
A standard ¼” input jack and input attenuator
button. The button is generally left out, except in rare
cases when the clip LED flashes.
4-Tuning Mute Button:
Set this switch to “On” when tuning up. No signal
will be sent to the speakers, or the P.A. system.
5-Volume:
Sets pre-amp gain after the input stage. It is used in
conjunction with the input pad, to optimize the
amplifier’s headroom.
6-Voicing Filters:
String Bass:
Setting
this button voices the pre-amp for basses with
“B” tuning. Leave it out and the amp is voiced like the
800RB, for 4 string basses.
Contour:
Drops the mid-range frequencies while boosting lows
& highs.
Presence:
Adds edge and definition to higher frequencies.
Active Equalization:
7-Treble:
Boost and cut at 7kHz+14dB shelving type. Add or
remove edge and definition.
8-High Mid:
Boost and cut at 1 kHz +6dB -10dB, “Q Optimized,”
band pass type. Works on lower string harmonics,
and effects the punch of your sound.
9-Low Mid:
Boost and cut at 250Hz +6dB -10dB, “Q Optimized,”
band pass type. Works on the main body of your
sound.
10-Bass:
Boost and cut at 60Hz +10dB, shelving type. Controls
low end push.
Outputs:
11-Boost:
A post EQ gain stage using GIVE technology which
adds “growl” as it is turned up.
12-Master:
Controls output level of the amplifier.
13-Effects Loop:
Send and return jacks provided for the insertion of
effects after the EQ, but before the boost section.
Some effect units have gain, turning the BOOST
down, will compensate for this.
14-Tuner Output
Output to tuner.
15-Power Switch
Turns the amplifier on or off. Should a problem
occur during operation press this switch out first.
Front
Panel
Controls
