Yamaha Q2031A - Manual (Page 2)

You have made the right choice. The YAMAHA Q2031A Graphic Equalizer offers truly
superior price/performance and is fully backed by YAMAHA’s wealth of accumulated
sound expertise. Congratulations and thank you.
The versatile Q2031A enables you to add up to 12dB of boost or cut at any of 31 bands
centered around International Standards Organization (ISO) 1 j3 octave frequencies from
20 Hz to 20 kHz. This versatility opens a wide range of applications in sound reinforce­
ment and recording. You can, for example, optimize gain to provide adequate feedback
margins at all frequencies. You can also creatively shape frequency characteristics to
match the particular room, studio, or hall and thus provide the realism and fidelity that
critical audiences demand.
This manual has been written to help you obtain optimum performance and trouble-free
operation from new Q2031A. Please read it throughly.
FEATURES
• This two-channel system offers completely independent
channel control—from the input all the way to the output.
• The narrow, 1/3-octave bandwidth and 31-band control
over the entire 20Hz to 20 kHz range provides very precise
equalization.
• The Q2031A has been very carefully designed from both
functional and operational perspectives. Each of the
equalization sections, for example, has an independent EQ
switch that bypasses the equalizer section, a High-Pass
Filter with a slider-adjustable roll-off frequency, and a
RANGE switch to select boost/cut ±6dB or ±12dB.
• The highly versatile Q2031A can be used in a wide variety
of applications and can be mounted in a standard 19”
rack.
• U.S. & Canadian models
Transformerless balanced (XLR Type connectors) or
unbalanced (1/4” phone jacks) inputs and outputs
are standard, with provisions for both input and
output transformer balancing. Two octal socket
(CHANNEL A and B ) are provided on the rear
panel. They will accept optional bridging input
transformer BRT15K if desired. The output trans­
former should be installed by a qualified service
technicians.
CONTENTS
FEATURES .................................................................................. 1
SPECIFICATIONS........................................................................... 2
PRECAUTIONS................................................................................ 3
FRONT PANEL................ ............................................................... 3
REAR PANEL.................................................................................. 5
TYPICAL CONFIGURATIONS ........................................................ 5
ACOUSTIC CONTROL.....................................................................6
BLOCK DIAGRAM ........................................................................ 19
DIMENSIONS..................................................................................19