BOSSCO GEB-7 User manual

ElS:
Owner's Manual
OF
(U € OUTPUT
g
Bass =
Equalizer
GEB-7
AC 8 BATTERY
POWERED
Bass
Equalizer

Thank you, and congratulations on your choice of BOSS GEB-7 Bass Equalizer.
To ensure proper operation, and years of trouble-free service, please take the time to read
through this Owner’s Manual before starting out.
FEATURES
e The BOSS GEB-7 is a 7-band equalizer designed specifically for electric bass.
e Since it allows for a broad range of frequency settings, even five string basses can be
accommodated.
e The unit is designed to provide the optimum O (equalizer's bandwidth) for bass for each
center frequency. While making it easy to obtain the most delicate of nuances, it also
allows for radically unique settings as well.
e The GEB-7 allows you to adjust the output level of the equalized sound so it matches
the level of the input sound.
©1995 BOSS Corporation
All right reserved. No part of this publication may be reproduced in any form without the
written permission of BOSS Corporation.
2
IMPORTANT NOTES
When
using
an
AC
adaptor,
use
only
the
specified
device
(PSA
Series).
Use
of
any
other
AC
adaptor
could
result
in
damage,
malfunction
or
electric
shock.
POWER SUPPLY
The power requirement for this unit is
indicated on its nameplate (rear panel).
Ensure that the voltage in your installation
meets this requirement.
If the unit is to remain unused for an ex-
tended period of time, unplug the power
cord.
PLACEMENT
Do not subject the unit to temperature
extremes (eg., direct sunlight in an en-
closed vehicle). Avoid using or storing the
unit in dusty or humid areas, or areas that
are subject to high levels of vibration.
ADDITIONAL PRECAUTIONS
Protect the unit from strong impact.
Should a malfunction occur, or if you sus-
pect there is a problem, discontinue use
immediately. Contact qualified service
personnel as soon as possible.
To avoid the risk of electric shock, do not
open the unit.
CHANGING BATTERY
Remove the battery whenever the unit is to
remain unused for an extended period of
time.

PANEL DESCRIPTIONS
Equalizer
GERS-7
BIBOSS
2. CHECK Indicator
This indicator shows whether an effect is
ON/OFF, and also doubles as the Battery
Check indicator.
The indicator lights when an effect is ON.
Ifthis indicator goes dim or no longer lights
while an effect is ON, the battery is near
exhaustion and should be replaced imme-
diately.
3. OUTPUT Jack
The output jacks are used to connect the
unit to amplifiers or other devices.
4. Pedal Switch
This switch turns the effects ON/OFF,
1. AC Adaptor Jack
Accepts connection of an AC Adaptor (op-
tionally available BOSS PSA-Series). By
using an AC Adaptor, you can play without
being concerned about how much battery
power you have left.
* You may find that it is a good idea to keep a
battery installed in the unit even while using
an adaptor. That way your playing won't be
disrupted even if the adaptor is accidentally
disconnected.
* If you are going to use an AC adaptor, be sure
to use the specified unit (BOSS PSA-Series).
Use of any other adaptor may result in dam-
age, malfunction or electric shock.
Also, if you are not going to be using it for an
extended period of time, disconnect the AC
adaptor from the AC outlet.
5. Thumbscrew
This thumbscrew is loosened to open the
pedal, allowing battery replacement. For
instructions on how to replace the battery,
please refer to “CHANGING THE BAT-
TERY”.
6. INPUT Jack
This jack accepts input signals (coming
from a bass guitar, some other musical
instrument, or another effects unit).
* The INPUT jack also serves as the power
switch. Power is turned on whenever a plug is
inserted into the INPUT jack, and is turned off
when the plug is disconnected. When not
using the unit, you should disconnect any
cord connected to the INPUT jack.

Equalizer
Control
Knobs
Equalizer
Control
knobs
These
knobs
allow
you
to
boost
or
cut
the
center
frequency
of
50,
120,
400,
500,
800
4.5
k
or
10
kHz
within
+/-15
dB.
Level
Control
Knob
>|
This
knob
allows
you
to
adjust
the
output
level
of
the
effect
sound
to
minimize
the
level
difference
between
the
effect
and
direct
sounds.
Level Control Knob
MAKING
THE
CONNECTIONS
ld
AC
Adaptor
(PSA-Series
;
Optional)
©
©
OUT 9V DC / 200mA
Bass =
Equalizer
GE-7
*
Inserting
a
plug
into
the
Input
Jack
will
automatically
switch
the
unit
on.
rds,
be
sure
all
the
volume
controls
in
your
system
*
Before
connecting
or
disconnecting
any
pa
tchco
damage
to
system
components.
are
set
to
minimum.
This
will
help
prevent
any
7

OPERATING THE UNIT
1.
When
you
have
made
the
necessary
—
2.
Depress
the
pedal
switch
to
turn
the
connections,
set
the
knobs
as
shown
in
effect
on.
(Make
sure
that
the
CHECK
the
illustration.
Indicator
lights.)
3.
Adjust
the
tone
using
the
relevant
Equal-
izer
Control
Knobs.
4.
Adjust
the
output
level
using
the
Level
Control
Knob,
to
minimize
the
level
difference
between
the
effect
and
direct
sounds.
A eel

CHANGING THE BATTERY
When the indicator goes dim or no longer lights
while an effect is on, it means that the battery is
nearly dead and must be replaced.
Replace
the
battery
following
the
steps
below.
Thumbscrew
7
P g Coil Spring
Guide
Bush
Hole
Housing
9V Battery
10
FREQUENCY RESPONSE
+15
Ke
. Loosen the thumbscrew at the front of the
pedal, then lift the pedal upwards to open the
unit.
* The thumbscrew can be left in the pedal
while changing the battery.
. Remove the old battery from the battery
housing, and remove the snap cord con-
nected to it.
3. Connect the snap cord to the new battery, and
place the battery inside the battery housing.
* Be sure to carefully observe the battery+s
polarity (+ versus -).
4. Slip the coil spring onto the spring base on the
back of the pedal, then close the pedal.
* Carefully avoid getting the snap cord caught
in the coil spring. `
5. Finally, insert the thumbscrew into the guide
bush hole and fasten it securely.
1k 10k
FREQUENCY(Hz)
11

Heavy Metal
SAMPLE SETTING
Standard Rock
Bass Amplifier Simulation
Slapping Play
72
SETTING MEMO
13

SPECIFICATIONS
GEB-7
:
Bass
Equalizer
Nominal
Input
Level
.................
-20
dBm
Input
Impedance
cnn...
1
MQ
Nominal
Output
Level
..............
-20
dBm
Output
Impedance
.…
1
kQ
Recommended
Load
Impedance
...
10
kQ
or
greater
Residual
Noise
Level
.................
-T00
dBm
(IHF-A,
Typ.)
Variable
Range
conocio...
Equalizer
Control
:
+/-15
dB
Level
Control
:
+/-15
dB
Control
as
Pedal
Switch,
Equalizer
Control
Knobs
(50,
120,
400,
500,
800,
4.5
k,
10
kHz)
Level
Control
Knob
,
14
Indicator
o
CHECK
Indicator
(serves
also
as
battery
check
indicator)
Connectors
sen.
INPUT
Jack,
OUTPUT
Jack,
AC
Adaptor
Jack
(9
V
DC)
Power
Supply
an.
9
V
DC
:
Dry
Battery
9
V
type
(6F22/9
V),
AC
Adaptor
Current
Draw
...........sccccsscssssseee
16
mA
(9
V
DC)
* Expected battery life under continuous use :
Carbon : 12 hours |
These figures will vary depending on the actual condi-
tions of use.
Dimensions
..........cccccssrresssceseees
70
(W)
x
125
(D)
x
55
(H)
mm
2-3/4 (W) x 4-15/16 (D) x 2-3/16 (H) inches
Wells
ads
440
g
/
1
lb
(including
battery)
Pros
re
rv
Owners
Manual,
Dry
Battery
9
V
type
(6722/9
V)
OPLONS zas zilina AC Adaptor PSA-Series
* 0 dBm = 0.775 V rms
*
In
the
interest
of
product
development,
the
specifications
and/or
appearance
of
this
unit
are
subject
to
change
without
prior
notice.
15

IO] BOSS Printed in Taiwan 95-1-D3-11C

Roland’
00679389
PC 00679389
oBoss