BOSSCO Heavy Metal HM-2 User manual

oBosS
Feavy Metal
INSTRUCTIONS
AC & BATTERY
POWERED
@
Please
read
these
instructions
carefully
for
proper
operatin
of
the
BOSS
HM-2.

FEATURES
The HM-2 is a distortion
effect specially designed for
Heavy Metal music. In
spite of its compact body,
it features an extremely wide
dynamic range, therefore al-
lowing rich, dynamic dis-
tortion sounds. Also, the
HM-2 can be effectively
used even with a single
pickup guitar of low out-
put level, because of its
high gain. Wide variety of
tone color creation is made
possible with two Color Mix
Controls.
AC ADAPTOR JACK
This is to connect an AC Adaptor.
COLOR MIX L
This
can
boost
or
cut
low
frequency
around
100 Hz. Rotaing this knob clockwise ( ( )
will boost it and counterclockwise ( € )
cut
it.
In
its
center
position,
there
is
no
effect on sounds.
LEVEL KNOB
This is to adjust the volume difference
between the direct and effect sounds.
Rotating this knob clockwise (() increases
the volume of the effect sounds.
OUTPUT JACK
This is to connect to an amplifier.
PEDAL SWITCH
By
using
a
Pedal
Switch,
the effect on or off.
*The
FET
Switching
system
amazingly
reduces
the
click
noise,
so
that
studio
recording
will
now
be
even
more
success-
ful.
INDICATOR
This serves as an effect ON/OFF indicator
as well as Battery check. This lights up
when the Pedal is pressed once, showing
that the HM-2 is in the effect mode. It
goes out when the Pedal is pressed once
you can turn
COLOR MIX L
LEVEL
OUTPUT
JACK
PEDAL SWITCH
NAME AND FUNCTIONS
AC ADAPTOR JACK
INDICATOR
COLOR MIX H
DISTORTION
INPUT JACK
THUMB SCREW
more, showing the normal mode.
*If the indicator becomes dimmer or does
not light at all, battery replacement is
required.
COLOR MIX H
This knob is used to boost or cut high
frequency around 1 kHz. Rotating this
knob clockwise ( © ) boosts and counter-
clockwise ( €) ) cut it.
DISTORTION
This knob is to control the depth of the
distortion together with the sustain time.
As you rotate the knob colckwise ( ( ),
the distortion becomes deeper and the
sustain time longer.
INPUT JACK
This is to connect an electric guitar, and
other electronic musical insrument.
*Plugging the cord into this Input Jack
turns the power to the HM-2 on. So
please disconnect the cord when the HM-2
is not to be used.
THUMB SCREW
*Loosen this thumb screw to open the
pedal cover for battery replacement.
*
Do
not
remove
the
loosen
screw
from
the
pedal
cover.

BEFORE USING HM-2
e
When
operating
the
HM-2
from
the
AC
line,
use
the
BOSS
AC
Adaptor.
® Avoid using the HM-2 in extreme heat, humidity or where it may be affected by
dust.
CONNECTING
HM-2
f TO BATTERY =
ELIMINATOR JACK
BOSS
AC ADAPTOR
Power is
switched GUITAR
on while
a plug is
AMPLIFIER
ee
input jack.
BOSS HM-2
Unplug this unit when it is not to be used. Be sure to take off connecting plug from Input jack.
OPERATING HM-2
1.
After
making
1
kHz,
and
counter-
all
the
connec-
clockwise
(
€)
)
will
tions,
set
the
cut
it.
In
its
center
panel
as
shown
position,
there
is
no
left.
effect.
Likewise,
COL-
OR MIX L serves to
2.
Press
the
Pedal
Switch.
boost
or
cut
the
lower
if
the
indicator
lights
frequency
characteristic
up,
the
effect
is
on,
around
100
Hz.
and
if
not,
off.
4
Adjust
the
depth
of
the
distortion by using the
Distortion Control.
* This indicator also serves
as battery check. If it
becomes dimmer or does
not light at all, battery
replacement is required.
3. With the COLOR MIX
H and L Controls, make
the tone color you
prefer. Rotating the
COLOR MIX H clock-
wise
{
C¥
-)
will
boost
volume
of
effect
sound
the
high
frequency
by
using
the
LEVEL
characteristic
|
around
Control
knob.
5. To reduce the volume
difference which is to
be noticed in changing
the modes from normal
to effect, adjust the

CAUTIONS FOR REPLACING AND HANDLING BATTERY
THUMB SCREW
BATTERY
HOUSING
BATTERY
CONNECTOR
CAUTIONS
e@When the HM-2 is not in use for a long
period, remove the battery to prevent
the trouble caused by the battery
leakage.
elf the battery voltage drops, effect
becomes inferior or no sound is prod-
uced. To prevent that, replace the
battery.
AC ADAPTOR (OPTION)
BOSS ACA-120
FOR 117V AC
BOSS ACA-240
FOR 240V AC
REPLACING BATTERY
USE ONE 9-VOLT BATTERY
Loosen the screw of pedal to open it
and take out battery from its housing.
Replace the battery with a new one.
Set coil spring onto the spring base on
the back of the pedal and shut the
cover (pedal). Finally, insert the screw
into the pedal guide and tighten it.
At this time, be careful not to catch
the battery strap in the cover or coil
spring.
eBe sure to keep the battery securely
connected even while using the AC
Adaptor, then the HM-2 will continued
to operate even if the AC Adaptor cord
comes out during performance.
@ Unplug the cord from the INPUT jack
when the HM-2 is not in use to avoid
wasting the battery.
Use BOSS AC adaptor
for AC operation.
Use of different
adaptors may cause
improper operation
or no sound.
BOSS ACA-220
FOR 220V AC

SPECIFICATIONS
POWER
er
05
ees
Boh
eee
QV
Battery
or
AC
Adaptor
(optional
BOSS
ACA-120,
220
or
240)
Power
Consumption
........
10mA
at
9V
Gontrols.
22.5:
2
8
awe
donee
Maes
LEVEL
COLOR MIX
L,H
Distortion
Normal/Effect Selector Switch
Battery
Check
Indicator
(serves
also
as
a
Normal/
Effect Indicator).
JACKS a5 ah ot eR ee ae Input
Output
AC Adaptor
Input Impedance .......... 1MQ
Dimensions
.............
7O(W)
x
55(H)
x
125(D)
mm.
2-3/4(W) x 2-3/16(H) x 4-15/16(D) in
seks
bebe
5
eile.
A
St
400
g/
14
oz.
*
Specifications
are
subject
to
change
without
notice.
BOSS
Products
of
Roland
Printed
in
Japan
Nov.
'83
A-4

=Roland*
10413
upc 10413
ll | | | 12981
cBoss