BOSSCO Heavy metal HM-2 User manual

him-2
Heavy metal
INSTRUCTIONS
AC & BATTERY
POWERED
• Please read these instructions carefully for proper operatin of the BOSS HM-2

FEATURES
NAME AND FUNCTIONS
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 ( O' >
will boost it and counterclockwise ( O )
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 (O-) increases
the volume of the effect sounds.
OUTPUT JACK
This is to connect to an amplifier.
PEDAL SWITCH
Bv using a Pedal Switch, you can turn
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
more, showing the normal mode.
*lf 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 ( O ) boosts and counter¬
clockwise ( O ) 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
• 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
OPERATING HM-2
1. After making
all the connec¬
tions, set the
panel as shown
left.
2. Press the Pedal Switch.
If the indicator lights
up, the effect is on,
and if not, off.
*This indicator also serves
as battery check. If it
becomes dimmer or does
not light at all, battery
replacement is required.
1 kHz, and counter¬
clockwise ( •O ) will
cut it. In its center
position, there is no
effect. Likewise, COL¬
OR MIX L serves to
boost or cut the lower
frequency characteristic
around 100 Hz.
Adjust the depth of the
distortion by using the
Distortion Control.
To reduce the volume
difference which is to
be noticed in changing
the modes from normal
to effect, adjust the
volume of effect sound
by using the LEVEL
Control knob.

CAUTIONS FOR REPLACING AND HANDLING BATTERY
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 thescrew
into the pedal guide and tighten it.
At this time, be careful not to catch
the battery strap in the cover or coil
spring.
CAUTIONS
• When the HM-2 is not in use for a long
period, remove the battery to prevent
the trouble caused by the battery
leakage.
• If the battery voltage drops, effect
becomes inferior or no sound is prod¬
uced. To prevent that, replace the
battery.
• Be 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.
AC ADAPTOR
(OPTION)
Use BOSS AC adaptor
for AC operation.
Use of different
adaptors may cause
improper operation
or no sound.
BOSS ACA-120
FOR 117V AC
BOSS ACA-240
FOR 240V AC
BOSS ACA-220
FOR 220V AC

SPECIFICATIONS
p ower . 9 V Battery or AC Adaptor (optional BOSS ACA-120,
220 or 240)
Power Consumption.10mA at 9V
Controls.LEVEL
COLOR MIX L, H
Distortion
Normal/Effect Selector Switch
Battery Check Indicator (serves also as a Normal/
Effect Indicator).
Jacks.Input
Output
AC Adaptor
Input Impedance.1
Dimensions.70(W) x 55(H) x 125(D) mm.
2-3/4IW) x 2-3/16(H) x 4-15/16{D) in
Weight.400g/14oz.
* Specifications are subject to change without notice.
Products of Roland
Printed in Japan Nov. '83 A-4

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