BOSSCO BD-2 Blues Driver User manual

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Owner's Manual
DCAC
AC & BATTERY
POWERED
FET

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Thank you, and congratulations on your choice of BOSS BD-2 Blues Driver.
Before using this unit, carefully read the sections entitled: “USING THE UNIT SAFELY”
and“IMPORTANTNOTES”(separatesheet).Thesesectionsprovideimportantinformation
concerningtheproperoperationoftheunit.Additionally,inordertofeelassuredthatyou
havegained agood graspof everyfeature providedby yournew unit,this manualshould
be read in its entirety. The manual should be saved and kept on hand as a convenient
reference.
© 1995 BOSS Corporation
All right reserved. No part of this publication may be reproduced in any form without
the written permission of BOSS Corporation.

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FEATURES
The BD-2 is the overdrive that has been specifically designed for crunch distortion.
It can faithfully express the tone change caused by moving the knobs on the guitar.
It can create distortion that can faithfully reproduce the picking nuance of the player.
It can create wide varieties of distortions from crunch to hard distortion, by adjusting the
Gain Knob.
EveniftheGainKnob israised,acleanandnatural soundcanbeproducedbyturningthe
volume of the guitar.
A natural-sounding overdrive continues to be produced without any loss in its quality,
even if you turn down the volume on your guitar.

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PANEL DESCRIPTIONS 1. AC Adaptor Jack
Acceptsconnection ofan ACAdaptor (op-
tionally available BOSS PSA-Series). By
usinganACAdaptor,youcanplaywithout
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.
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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.
Ifthisindicatorgoesdimornolongerlights
while an effect is ON, the battery is near
exhaustion and should be replaced imme-
diately.
* TheCHECKindicatorshowswhethertheeffect
is being applied or not. It does not indicate
whether the power to the device is on or not.
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.
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 guitar, some other musical instru-
ment, or another effects unit).
* The INPUT jack also serves as the power
switch.Poweris turnedonwhenever aplugis
insertedintotheINPUTjack, andisturnedoff
when the plug is disconnected. When not
using the unit, you should disconnect any
cord connected to the INPUT jack.

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LEVEL Knob
Thisadjuststhevolumeoftheeffectsound.
* When this knob is turned counterclockwise,
no sound will be heard.
TONE Knob
This adjusts the tone of sound. Rotating it
clockwise will create sharp sound with
emphasized treble, while turning it
counterclockwise will create soft sound
with cut treble.
GAIN Knob
This adjusts the gain of the blues driver.
Rotating the knob clockwise will increase
the gain creating harder distortion.
LEVEL Knob GAIN Knob
TONE Knob

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MAKING THE CONNECTIONS
* Inserting a plug into the Input Jack will automatically switch the unit on.
*Beforeconnectingordisconnectinganypatchcords,besureallthevolumecontrolsinyoursystem
are set to minimum. This will help prevent any damage to system components.
AC Adaptor (PSA-Series ; Optional)
Electric Guitar
Amplifier
OUT 9V DC / 200 mA

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OPERATING THE UNIT
1. When you have made the necessary
connections, set the knobs as shown in
the illustration.
2. Depress the pedal switch to turn the
effect on. (Make sure that the CHECK
Indicator lights.)
3. Adjust the gain of the Dry or Overdrive
sound using the GAIN Knob.

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4. Adjust the tone using the TONE Knob. 5. Adjust the LEVEL Knob so there will be
no volume difference between the ef-
fect and straight bass sounds.

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Thumbscrew
Pedal
Spring Base
Coil Spring
Guide
Bush
Hole
Battery
Housing
Battery Snap Cord
Battery Snap
9V Battery
CHANGING THE BATTERY
Whenthe 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.
1. Loosen the thumbscrew at the front of the
pedal,thenliftthepedalupwardstoopenthe
unit.
* The thumbscrew can be left in the pedal
while changing the battery.
2. Remove the old battery from the battery
housing, and remove the snap cord con-
nected to it.
3.Connectthesnapcordtothenewbattery,and
place the battery inside the battery housing.
* Be sure to carefully observe the battery's
polarity (+ versus -).
4.Slipthecoilspringontothespringbaseonthe
back of the pedal, then close the pedal.
*Carefullyavoidgettingthesnapcordcaught
in the coil spring.
5.Finally, insert the thumbscrew into the guide
bush hole and fasten it securely.

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SAMPLE SETTING
Crunch British Blues
American Blues Booster

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OverDrive Turbo OverDrive
Chord Play Clean Crunch

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SETTING MEMO

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SPECIFICATIONS
BD-2 : Blues Driver
Nominal Input Level ................. -20 dBu
Input Impedance ...................... 1 MΩ
Nominal Output Level .............. -20 dBu
Output Impedance ................... 1 kΩ
Equivalent Input Noise Level .... -118 dBu (IHF-A, Typ.)
Controls.................................... Pedal Switch, LEVEL Knob, TONE Knob, GAIN Knob
Indicator................................... CHECKIndicator(servesalsoasbatterycheckindicator)
Connectors ............................... INPUT Jack, OUTPUT Jack, AC Adaptor Jack (9 V DC)
Power Supply ........................... 9 V DC : Dry Battery 9 V type (6F22/9 V), AC Adaptor
Current Draw ........................... 13 mA (9 V DC)
* Expected battery life under continuous use :
Carbon : 20 hours
These figures will vary depending on the actual condi-
tions of use.

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Dimensions............................... 73 (W) x 129 (D) x 59 (H) mm
2-7/8 (W) x 5-1/8 (D) x 2-3/8 (H) inches
Weight...................................... 400 g / 15 oz (including battery)
Accessories ............................... Owner's Manual, Dry Battery 9 V type (6F22/9 V),
Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT
NOTES,” and “Information”)
Options .................................... AC Adaptor PSA-Series
* 0 dBu = 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.
This product complies with the requirements of
European Directive 89/336/EEC.
For EU Countries

16 2601721002