Rockville GB1 User manual

1 2 3
4 5
Loosen the base knob. Tighten the base knob.
Loosen the neck knob.
Pull the legs downwards and outwards.
Pull the shaft
upwards to
adjust the
height.
6
Tighten the
neck knob.
Insert the safety pin.

WARNING: Do not use both inputs at the once.

HIGH
LOW

# EFFECT PARAMETER
0 Reverb Hall 3.0sec
1 Reverb Hall 5.0sec
2 Reverb Room 1.0sec
3 Reverb Room 2.0sec
4 Reverb Plate 1.0sec
5 Reverb Plate 2.0sec
6 Echo 43% F.B. 100ms
7 Echo 43% F.B. 200ms
8 Echo 43% F.B. 300ms
9 Echo 58% F.B. 100ms
A Echo 58% F.B. 200ms
B Echo 58% F.B. 300ms
C Chorus & Reverb 0.6Hz/ 2.0sec
D Flanger & Reverb 0.6Hz/ 2.0sec
E Chorus 0.6Hz
F Flanger 0.6Hz

PROBLEM CHECK CORRECTION
No sound
(LCD not lit)
Is power switch on? Is
line cord connected to
live power outlet?
Turn power switch on. Connect power
cord to live outlet
No sound
(LCD not lit)
Are MASTER and
CHANNEL GAIN
controls up?
Adjust both MASTER and CHANNEL
LEVEL controls upward to desired
level. Check speaker connections.
Turn mic switch on. Check mic or
sound source connection.
No Effects
Are the channel
EFFECTS controls
turned up?
Is the master EFFECTS
MUTE enabled?
Is an effect activated
in menu?
Make sure desired effect is select-
ed in Master effect menu. Check the
master EFFECTS MUTE. If the LED
is illuminated the EFFECTS MUTE
is active. Press the EFFECTS MUTE
button once to disable. Adjust chan-
nel EFFECTS control until audio effect
is heard.
Files on USB
memory
device will not
play back
Is the file cued for
playback?
Are the audio files the
proper format?
Make sure once MEDIA SELECT knob
is rotated to display desired le the
knob is then pressed to cue the le.
Make sure your audio les are the cor-
rect format. See the list of supported
audio formats mentioned previously
in this manual.
Loud howling
or squeal from
speakers
If it goes away when
the CHANNEL or
MASTER LEVEL
controls are turned
down, then it is
acoustic feedback.
Reduce microphone gain. Reposition
microphone behind or farther from
speakers.
Sound is
distorted
Is the CHANNEL GAIN
at a very high setting?
Reduce CHANNEL GAIN and increase
MASTER VOLUME