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

mEQ301 FEATURES

FRONT PANEL

boost

cut

Filter Controls: These 30 slide controls adjust the gain in each
of the filter bands (25Hz~20kHz). Each control has a range of
±12dB or ±6dB boost/cut depending upon the position of the
Range Switch. The controls have a center detent (flat).

Master Gain Control: This slide control adjusts the overall gain
of the equalizer only when the EQ Bypass Switch is depressed
(in). It has a range of ±12dB. Use this control to compensate
for changes in gain due to filter adjustments.

Range Swich (12dB / 6dB): This switch selects the boost/cut
range of the filter slide controls. When released (out), this
switch selects the 12dB range. When depressed (in), this switch
selects the 6dB range.

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.

250

REAR PANEL

boost

0

cut

gain

+12

12dB

0

6dB

out

-12

in

mEQ301

on

peak

EQ

20K

16K12.5K10K8K6.3K5K4K3.15K2.5K2K1.6K1.25K1K8006305004003152001601251008063504031.525

Peak Indicator: This red LED indicates signal levels of at least
+15dBu (9dB below clipping) are present in the equalizer.

EQ Bypass Switch (In / Out): This switch activates or
bypasses the Filter Controls and Master Gain Control for the
equalizer. When released (out), this switch bypasses the
equalization. When depressed (in), this switch activates the
equalization. Use EQ Bypass to compare equalized signals to
un-equalized signals.

output

input

Output: This plug-in barrier strip connector provides balanced
output from the equalizer. For unbalanced output, connect to
the Output with high to (+) and ground to (



), leaving (-)
unconnected. Signal levels will be reduced by 6dB when the
Output is unbalanced.

Input: This plug-in barrier strip connector provides balanced
input to the equalizer. For unbalanced input, connect to the
Input with high to (+) and ground to both (-) & (



).

3

SPECIFICATIONS

mEQ152

Frequency Response (20Hz-20kHz @ +4dBu): +0,-0.5dB +0,-0.5dB

Total Harmonic Distortion (20Hz-20kHz @ +4dBu): < 0.008% < 0.008%

Intermodulation Distortion (SMPTE): < 0.008% < 0.008%

Noise Floor (20Hz-20kHz @ unity gain w/ filters flat): -85dBu -82dBu

Maximum Input Level: +24dBu +24dBu

Input Impedance (balanced): 20k ohms 20k ohms

Maximum Output (600 ohm load): +21dBm +21dBm

Output Impedance (balanced): 200 ohms 200 ohms

Power Consumption: < 12 Watts < 10 Watts

Power Requirements: 115/230VAC 50/60Hz 115/230VAC 50/60Hz

Dimensions:

mEQ301

Height (1 rack space)

Width

Depth

Weight: 6 lbs. (2.72kg) 6 lbs. (2.72kg)

1.75" (44mm)

19" (483mm)

7.25" (184mm)

1.75" (44mm)

19" (483mm)

7.25" (184mm)

4

WARRANTY

BIAMP SYSTEMS IS PLEASED TO EXTEND THE FOLLOWING 5-YEAR

LIMITED WARRANTY TO THE ORIGINAL PURCHASER OF THE

PROFESSIONAL SOUND EQUIPMENT DESCRIBED IN THIS MANUAL.

BIAMP Systems expressly warrants this product to be
free from defects in material and workmanship for a
period of 5 YEARS from the date of purchase as a
new product from an authorized BIAMP Systems
dealer under the following conditions.

1. In the event the warranted BIAMP Systems product
requires service during the warranty period, BIAMP
Systems will repair or replace, at its option, defective
materials, provided you have identified yourself as the
original purchaser of the product to any authorized
BIAMP Systems Service Center. Transportation and
insurance charges to and from an authorized Service
Center or the BIAMP Systems factory for warranted
products or components thereof to obtain repairs shall
be the responsibility of the purchaser.

2. This warranty will be VOIDED if the serial number
has been removed or defaced; or if the product has
been subjected to accidental damage, abuse, rental
usage, alterations, or attempted repair by any person
not authorized by BIAMP Systems to make repairs; or
if the product has been installed contrary to BIAMP
Systems's recommendations.

3. Electro-mechanical fans, electrolytic capacitors,
and the normal wear and tear of appearance items
such as paint, knobs, handles, and covers are not
covered under this warranty.

4. BIAMP SYSTEMS SHALL NOT IN ANY EVENT BE
LIABLE FOR SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, INCLUDING LOST
PROFITS, LOSS OF USE, PROPERTY DAMAGE, INJURY
TO GOODWILL, OR OTHER ECONOMIC LOSS OF ANY
SORT. EXCEPT AS EXPRESSLY PROVIDED HEREIN,
BIAMP SYSTEMS DISCLAIMS ALL OTHER LIABILITY TO
PURCHASER OR ANY OTHER PERSONS ARISING OUT
OF USE OR PERFORMANCE OF THE PRODUCT,
INCLUDING LIABILITY FOR NEGLIGENCE OR STRICT
LIABILITY IN TORT.

5. THIS WARRANTY IS IN LIEU OF ALL OTHER
WARRANTIES EXPRESSED OR IMPLIED. BIAMP
SYSTEMS EXPRESSLY DISCLAIMS ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. THE REMEDIES SET
FORTH HEREIN SHALL BE THE PURCHASER'S SOLE
AND EXCLUSIVE REMEDIES WITH RESPECT TO ANY
DEFECTIVE PRODUCT. THE AGENTS, EMPLOYEES,
DISTRIBUTORS, AND DEALERS OF BIAMP SYSTEMS
ARE NOT AUTHORIZED TO MODIFY THIS WARRANTY
OR TO MAKE ADDITIONAL WARRANTIES BINDING ON
BIAMP SYSTEMS. ACCORDINGLY, ADDITIONAL
STATEMENTS SUCH AS DEALER ADVERTISEMENTS
OR REPRESENTATIONS DO NOT CONSTITUTE
WARRANTIES BY BIAMP SYSTEMS.

6. No action for breach of this warranty may be
commenced more than one year after the expiration of this
warranty.

Thank you for purchasing BIAMP SYSTEMS...

AMERICAN SOUND CRAFTSMANSHIP

Biamp Systems

10074 S.W. Arctic Drive

Beaverton, Oregon 97005

[phone]

http://www.biamp.com

585.0136.00