TM mEQ152
&
mEQ301
micro Graphic Equalizers
Operation Manual
Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97229 U.S.A. (503) 641-7287 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
pg. 2
INTRODUCTION
The ADVANTAGE ® mEQ152 and mEQ301 are professional quality, single pg. 3 pg. 4 rack-space graphic equalizers. The mEQ152 provides two independent 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 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
♦
marked and UL / C-UL listed power source
♦
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
♦ marked and UL / C-UL listed power source
♦ covered by Five-Year ‘Gold Seal’ Warranty
1
mEQ152 FEATURES
FRONT PANEL
25 40 63 100 160 250 400 630 1K 1.6K
2.5K
4K 6.3K
10K 16K 25 40 63 100 160 250 400 630 1K 1.6K
2.5K
4K 6.3K
10K 16K gain boost +12
12dB 12dB peak
0 0 peak on mEQ152
6dB out cut -12
6dB out
EQ EQ in
Channel 1 Channel 2 1 2 in
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.
REAR PANEL
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.
27V
~
50/60 Hz
BIAMP SYSTEMS
PORTLAND,OREGON an affiliate of
Rauland-Borg Corp output input output input
15 watts class 2 wiring
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. 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 (-) & ( ).
2
mEQ301 FEATURES
FRONT PANEL boost
25 31.5
40 50 63 80 100 125 160 200 250 315 400 500 630 800 1K 1.25K
1.6K
2K 2.5K
3.15K
4K 5K 6.3K
8K 10K 12.5K
16K 20K boost gain
+12
12dB
0 0 peak on mEQ301
6dB out cut cut -12
EQ in
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.
REAR PANEL
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.
27V
~
50/60 Hz
BIAMP SYSTEMS
PORTLAND,OREGON an affiliate of
Rauland-Borg Corp output input
15 watts class 2 wiring
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.
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 mEQ301
Frequency Response (20Hz-20kHz @ +4dBu) : +0,-0.5dB
Total Harmonic Distortion (20Hz-20kHz @ +4dBu) :
Intermodulation Distortion (SMPTE) :
< 0.008%
< 0.008%
< 0.008%
< 0.008%
Noise Floor (20Hz-20kHz @ unity gain w/ filters flat) : -85dBu
Maximum Input Level: +24dBu
Input Impedance (balanced) : 20k ohms 20k ohms
Maximum Output (600 ohm load) : +21dBm
Output Impedance (balanced) :
Power Consumption:
Power Requirements:
200 ohms
< 12 Watts
115/230VAC 50/60Hz
200 ohms
< 10 Watts
115/230VAC 50/60Hz
Dimensions:
Height (1 rack space)
Width
Depth
Weight:
1.75" (44mm)
19" (483mm)
7.25" (184mm)
6 lbs. (2.72kg)
1.75" (44mm)
19" (483mm)
7.25" (184mm)
6 lbs. (2.72kg)
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
(503) 641-7287 http://www.biamp.com
585.0136.00
