Biamp MEQ152, MEQ301 User Manual

TM

mEQ152 & mEQ301

micro Graphic Equalizers

Operation Manual

Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97229 U.S.A. [phone] www.biamp.com

an affiliate of Rauland Borg Corp.

blank

print update

June 12/98

TABLE OF CONTENTS

mEQ152 features

mEQ301 features

Specifications

Warranty

mEQ152 & mEQ301

INTRODUCTION

pg. 2

The ADVANTAGE
rack-space graphic equalizers. The mEQ152 provides two independent

pg. 3

channels of true 2/3-octave frequency control. The mEQ301 provides a single
channel of true 1/3-octave frequency control. The use of Constant-Q

pg. 4

technology guarantees precise room tuning with less filter interaction, better
filter combining, and constant filter bandwidth at any setting. This design also
produces a more accurate front panel graphic representation of the actual
equalization 'curve', so tuning a room becomes an easier process. Best of all,
the mEQ152 & mEQ301 deliver unmatched performance at an excellent price.

mEQ152 features include:

♦ 2/3-octave stereo 15-band graphic EQ (25Hz~16kHz)

♦ front panel switchable ±12dB or ±6dB filter range

♦ front panel +15dBu LED peak indicators

♦ balanced input & output on plug-in barrier strips

♦ front panel EQ bypass switch for each channel

♦ RFI filtering for protection from radio interference

♦ FET output muting to prevent turn on/off transients

♦ Constant-Q filter design for more precise equalization

♦ incorporates AES recommended grounding practices

♦

♦ covered by Five-Year ‘Gold Seal’ Warranty

mEQ301 features include:

♦ 1/3-octave 30-band graphic EQ (25Hz~20kHz)

♦ front panel switchable ±12dB or ±6dB filter range

♦ front panel +15dBu LED peak indicators

♦ balanced input & output on plug-in barrier strips

♦ front panel EQ bypass switch for comparison

♦ RFI filtering for protection from radio interference

♦ FET output muting to prevent turn on/off transients

♦ Constant-Q filter design for more precise equalization

♦ incorporates AES recommended grounding practices

♦

♦ covered by Five-Year ‘Gold Seal’ Warranty

®

mEQ152 and mEQ301 are professional quality, single

marked and UL / C-UL listed power source

marked and UL / C-UL listed power source

1

mEQ152 FEATURES

FRONT PANEL

2.5K

12dB

peak

6dB

out

EQ

in

Channel 1

Range Swiches (12dB / 6dB): These switches select the
boost/cut range of the filter slide controls for the respective
channels. When released (out), these switches select the 12dB
range. When depressed (in), these switches select the 6dB
range.

Peak Indicators: These red LEDs indicate signal levels of at
least +15dBu (9dB below clipping) are present in the respective
channels.

EQ Bypass Switches (In / Out): These switches activate or
bypass the Filter Controls and Master Gain Control for the
respective channels. When released (out), these switches
bypass the equalization. When depressed (in), these switches
activate the equalization. Use EQ Bypass to compare equalized
signals to un-equalized signals.

27V

~

50/60 Hz

15 watts
class 2 wiring

BIAMP SYSTEMS

PORTLAND,OREGON

an affiliate of

Rauland-Borg Corp

MADE IN U.S.A.

AC Power Cord: The external power transformer provides 27
Volts AC to the equalizer, and is detachable via a 5-pin DIN
connector. The equalizer has two internal ‘self-resetting’ fuses
(there are no user servicable parts inside the unit). If the
internal fuses blow, they will attempt to re-set after a short
period. However, this may be an indication that the equalizer
requires service.

16K10K6.3K4K1.6K1K630400250160100634025 16K10K6.3K4K2.5K1.6K1K630400250160100634025

REAR PANEL

boost

0

cut

Channel 2

Filter Controls: These slide controls adjust the gain in each of
the filter bands (25Hz~16kHz/channel). There are 15 bands per
channel. Each control has a range of ±12dB or ±6dB boost/cut
depending upon the position of the channel Range Switch. The
controls have a center detent (flat).

Master Gain Controls: These slide controls adjust the overall
gain of the repective channels only when the EQ Bypass
Switches are depressed (in). They have a range of ±12dB. Use
these controls to compensate for changes in gain due to filter
adjustments.

output

input

channel 2 channel 1

Outputs: These plug-in barrier strip connectors provide
balanced output from the respective channels. For unbalanced
output, connect to the Outputs with high to (+) and ground to (
leaving (-) unconnected. Signal levels will be reduced by 6dB
when the Outputs are unbalanced.

Inputs: These plug-in barrier strip connectors provide balanced
input to the respective channels. For unbalanced input, connect
to the Inputs with high to (+) and ground to both (-) & (

gain

+12

12dB

0

6dB

out

-12

2

1

in

output

mEQ152

on

peak

EQ

input



),



).

2