Drawmer HQ-b Operator's Manual - Page 14

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CHAPTER 4
Attenuates the level over all outputs - e.g. with the jumpers set to -6dB attentuation the maximum acheivable output
level would be +21dBu.
Left - Jumpers J53 & J54
NONE
-2dB
Left - Jumpers J44 & J49
NONE
-2dB
The jumper sets whether the outputs A and B are at a fixed level, or use the level set by the 'Level' control knob.
Speakers A
Left - Jumper J40
VARIABLE
FIXED
A FIXED LEVEL OUTPUT COULD BE DANGEROUS AND UNLESS USED
CAREFULLY COULD DAMAGE YOUR EQUIPMENT OR YOUR EARS!
As a factory fitted standard when inserting a 1/4"
headphone jack into the left socket the output
across speakers A and B is un-altered, however,
plugging the headphones into the right socket will
mute the outputs. This can be altered, for both
sockets, using jumpers J38 and J39.
14

INTERNAL JUMPER SETTINGS

A few of the factory default settings can be altered via jumpers inside the unit to
customize to your absolute optimum functional preferences.
The following procedure must be done with great care and by a competent
professional. Before continuing turn the power off and remove the mains I.E.C.
cable. To gain access to the jumpers you must first remove the cover - this is done
by unscrewing the nine screws, positioned as
shown left:
The relevant jumpers are located in the
following positions:
Jumpers for Output Attenuation
& Output Volume Control Type
Jumpers for Headphone Jacks

Output Attenuation

-4dB
-6dB
-4dB
-6dB
Output Volume Control Type
Right- Jumper J42
*
VARIABLE
FIXED
Headphone Jack Output Mute
DRAWMER HQ O
Speakers
A
Right - Jumpers J59 & J60
NONE
Speakers
B
Right - Jumpers J57 & J58
NONE
Left - Jumper J35
*
VARIABLE
*
WARNING:
Left - Jumper J38
UN-ALTERED MUTED
M
PERATOR'S
ANUAL
-2dB
-4dB
-2dB
-4dB
Speakers B
Right- Jumper J41
*
FIXED
VARIABLE
Right - Jumper J39
UN-ALTERED MUTED
-6dB
-6dB
*
FIXED