Mesa/Boogie Heartbreaker Owner'S Manual Download Page 10

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BASS: This control blends in the lower frequencies and its effectiveness, again, depends on the setting of the TREBLE control. It
should be set with moderation as extreme settings in either low or high directions can produce an unbalanced tone. Be “especial ly”
especially careful when using higher VOLUME settings in either channel. Too much BASS will cause a flabby unfocused sound that

can’t be dialed out because excessive BASS has been introduced to the pre-amp
in the early stages. Try setting the BASS to

for clean sounds in the “LO” modes

and

or below when dialing up pushed sounds in either channel. In the “HI”

modes of either channel, try setting the BASS somewhere between

and

You may want to vary these settings depending on the amount of VOLUME and
TREBLE you have dialed up.

MASTER: The individual channel MASTER controls serve two purposes in the layout of the

HEARTBREAKER

. FIRST: They

serve as level balancing controls for each of the two channels. This enables a wide range of front end gain settings to be matched to

a given listening level and the level of the opposing channel.

SECOND: They act as effect send controls for each channel in the effects
loop. As with many of the controls on the

HEARTBREAKER

, the best resuls

for balance and tone are usually found in the medium range of this control from

NOTE: When trying to use your

HEARTBREAKER

at extremely low levels, it will be necessary to reduce the far left VOLUME

control. Once the MASTERS and LEVEL has been reduced to roughly 1.5, reducing the MASTERS or LEVEL below this point
causes phase interaction that prevents a clean signal from passing through this circuit junction. If you must use your

HEART-

BREAKER

at whisper levels to practice late at night, etc...get use to reducing the VOLUME as well as the MASTERS and LEVEL.

This effect is most noticeable when set for a crystal clean sound.

CHANNEL & MODE CONTROL: The two channels and their modes are called up and controlled from the front panel when the
channel select footswitch is not connected by using the stack of mini-toggles that separate the channels. CHANNEL SELECT: CH 1

/ CH 2: This two position toggle selects between Channel 1 (LOVE)
and Channel 2 (LUST). MODE SELECT: CH 1 - GAIN: This two
position toggle selects the gain structure of Channel 1. The two
choices are - “LO” and “HI”, as shown in the illustration to the left.

NOTE: See Voicing Switches - Channel 1 section to choose
“HI” mode gain structure as Channel 1 - “HI” contains two
choices. See Note for warning.

MODE SELECT: CH2 - GAIN: This two position toggle selects the gain structure of Channel 2. The two choices are “LO” and “HI”.

NOTE: Channel 1’s (LOVE) “HI” - BOOST mode is much higher gain than any of the other 5 modes in the

HEARTBREAKER

As a result this mode is substantially louder for a given master setting than any of the other 4 modes. We were forced to leave this
volume discrepancy intact to preserve the integrity of the original

MARK I s’

lead voice.

FRONT PANEL & CONTROLS:

(Continued)

INPUT

SWITCH

VOLUME

TREBLE

MIDDLE

INPUT

SWITCH

VOLUME