2-Series Graphic Equalizers
Contents
1. gt 21 dBu balanced unbalanced into 2 kQ or greater gt 18 dBm balanced unbalanced into 600 Q 20 Hz to 20 kHz 0 5 1 dB lt 10 Hz to gt 50 kHz 0 5 3 dB Typically gt 112 dB Typically gt 95 dB lt 0 003 lt 90 dB 20 Hz to 20 kHz Bypasses the graphic equalizer section in the signal path Activates the 50 Hz 12 dB octave high pass filter Selects either 6 dB or 12 dB slider boost cut range 100 240 VAC 50 60 Hz 15 W IEC receptacle Size 3 5 Hx 19 Wx 6 D Product Weight 6 2 lbs Shipping Weight 7 9 lbs Size 1 75 Hx 19 W x 6 D Product Weight 4 8 lbs Shipping Weight 6 2 lbs Size 1 75 Hx 19 W x 6 D Product Weight 4 8 lbs Shipping Weight 6 2 lbs Note Specifications subject to change dbx by HARMAN 8760 South Sandy Parkway Sandy Utah 84070 Phone 801 568 7660 Fax 801 568 7662 Int l Fax 801 568 7583 E mail us at customer dbxpro com or visit us on the web at www dbxpro com www driverack com Printed in China 18 0804V A2. and dbx neither assumes nor authorizes any person to assume on its behalf any obligation or liability in connection with the sale of this product In no event shall dbx or its dealers be liable for special or consequential damages or from any delay in the performance of this warranty due to causes beyond their control User Manual Section 1 Introduction Congratulations on your purchase of a dbx 2 Series Graphic Equalizer The 2 Series rep resents a major step forward in the performance of entry level graphic equalizers From their amazing 10 Hz to 50 kHz frequency response to its 112 dB dynamic range the 2 Series offer out of this world specifications with a down to earth price point Sure to find a home in the studio on tour and with installed sound venues the 2 Series is destined to take its rightful place in the lineage of great dbx9 signal processors that are the Professional s Choice With such affordable quality there s no longer any excuse for compromising your sound The 2 Series Equalizers include the following features 131s One 31 band 1 3 octave Constant Q frequency bands 215s Two 15 band 2 3 octave Constant Q frequency bands 231s Two 31 band 1 3 octave Constant Q frequency bands Switchable boost cut ranges of 6 dB or 12 dB 12 dB per octave 50 Hz low cut filter Front panel bypass switch 12 dB input gain range 4 segment LED ladders for monitoring output levels e XLR and TRS Inputs an
3. Live As colours of the cores in the mains lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug proceed as follows The core which is coloured green and yellow must be connected to the terminal in the plug marked with the letter E or with the earth symbol or coloured green or green and yellow The core which is coloured blue must be connected to the terminal marked N or coloured black The core which is coloured brown must be connected to the terminal marked L or coloured red This equipment may require the use of a different line cord attachment plug or both depending on the available power source at installation If the attachment plug needs to be changed refer servicing to qualified service personnel who should refer to the table below The green yellow wire shall be connected directly to the units chassis CONDUCTOR WIRE COLOR Normal Alt E LIVE BROWN BLACK N NEUTRAL BLUE WHITE E EARTH GND GREEN YEL GREEN WARNING If the ground is defeated certain fault conditions in the unit or in the system to which it is connected can result in full line voltage between chassis and earth ground Severe injury or death can then result if the chassis and earth ground are touched simultaneously WARNING FOR YOUR PROTECTION READ THE FOLLOWING KEEP THESE INSTRUCTIONS HEED ALL WARNINGS FOLLOW ALL INSTRUCTIONS THE APPARATUS SHALL NOT BE E
4. XPOSED TO DRIPPING OR SPLASH ING LIQUID AND NO OBJECT FILLED WITH LIQUID SUCH AS VASES SHALL BE PLACED ON THE APPARATUS CLEAN ONLY WITH A DRY CLOTH DO NOT BLOCK ANY OF THE VENTILATION OPENINGS INSTALL IN ACCORDANCE WITH THE MANUFACTURER S INSTRUCTIONS DO NOT INSTALL NEAR ANY HEAT SOURCES SUCH AS RADIATORS HEAT REGISTERS STOVES OR OTHER APPARATUS INCLUDING AMPLIFIERS THAT PRODUCE HEAT ONLY USE ATTACHMENTS ACCESSORIES SPECIFIED BY THE MANUFACTURER UNPLUG THIS APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED FOR LONG PERIODS OF TIME Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A ground ing type plug has two blades and a third grounding prong The wide blade or third prong are provided for your safety If the provided plug does not fit your outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Use only with the cart stand tripod bracket or table specified by the manufacture or sold with the apparatus When a cart is used use cau tion when moving the cart apparatus combination to avoid injury from tipover Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or pl
5. ah 84070 USA Ph 801 566 8800 IF you want to dispose this product do not mix it with general household waste There is a AS separate collection system for used electronic products in accordance with legislation that Fax 801 568 7583 requires proper treatment recovery and recycling Private household in the 25 member states of the EU in Switzerland and Norway may return their used electronic products free of charge to designated collection facilities or to a retailer if you purchase a similar new one For Countries not mentioned above please contact your local authorities for a correct method of disposal By doing so you will ensure that your disposed product undergoes the necessary treatment recovery and recycling and thus prevent potential negative effects on the environment and human health Table of Contents Section 1 IntrodUCEIOIl 2 ciere cin eae ee gae Yt E see eye EP Euer REFS e Vos veo 6 Section 2 Operating Controls iicet e tede n rere to eve sees aera eor ekun 7 Section 3 Connecting the EQ to Your System esee 8 Section 4 Rear Panel DescriptiORs scovissesscsavcsssssvesscevesesscavadeaededenerseasseads 9 Section 5 Installation Considerations sssseccccceesseecceeeeeseeceeeeeeeeeees 9 Section 6 Operation and Application Notes cccsssssecececeeeeeeeceeeeeeeeeees 10 korean 11 Service Info If you requ
6. before making connections Mount equalizer in a standard width rack Install the EQ in a rack with the rack screws provided It can be mounted above or below anything that does not generate excessive heat Ambient temperatures should not exceed 113 F 45 C when equipment is in use Although the unit s chassis is shielded against radio frequency and electromagnetic interference extremely high fields of RF and EMI should be avoided Make audio connections via XLR or 1 4 TRS jacks according to application needs Both types of connectors for the inputs and outputs can be used for balanced or unbalanced connections The use of more than one connector at a time for the inputs could unbalance balanced lines cause phase cancellation short a conduc tor to ground or cause damage to other equipment connected to the equalizer More than one output may be used simultaneously as long as the combined paral lel load is greater than 2 kQ Select the operating range with the Boost Cut range selection switch NOTE Be sure to reduce audio levels at the power amplifiers when changing the setting of this switch as it may generate an audible transient Apply power to the equalizer Connect the AC power cord to the AC power receptacle on the back of the equal izer Route the AC power cord to a convenient power outlet away from audio lines Since the 2 Series Equalizers consume a relatively small amount of power the units may be left on cont
7. by HARMAN 2 Series 8 Graphic Equalizers 3 oH HT mn 131s 215s 231s Professional Audio Equipment IMPORTANT SAFETY INSTRUCTIONS CAUTION RISK OF ELECTRIC SHOCK DONOTOPEN AmA ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR WARNING TOREDUCETHERISKOFFIREORELECTRIC SHOCKDONOTEXPOSETHISEQUIPMENTTORAINOR MOISTURE The symbols shown above are internationally accepted symbols that warn of potential hazards with electrical products The lightning flash with arrowpoint in an equilateral triangle means that there are dangerous voltages present within the unit The exclamation point in an equilateral tri angle indicates that it is necessary for the user to refer to the owner s manual These symbols warn that there are no user ser viceable parts inside the unit Do not open the unit Do not attempt to service the unit yourself Refer all servicing to qualified personnel Opening the chassis for any reason will void the manufac turer s warranty Do not get the unit wet If liquid is spilled on the unit shut it off immediately and take it to a dealer for service Disconnect the unit during storms to prevent damage SAFETY INSTRUCTIONS NOTICE FOR CUSTOMERS IF YOUR UNIT IS EQUIPPED WITH A POWER CORD WARNING THIS APPLIANCE MUST BE EARTHED The cores in the mains lead are coloured in accordance with the following code GREEN and YELLOW Earth BLUE Neutral BROWN
8. ckage properly Ship prepaid not collect Do not ship parcel post User Manual Warranty This warranty is valid only for the original purchaser and only in the United States 1 The warranty registration card that accompanies this product must be mailed within 30 days after purchase date to validate this warranty You can also register online at www dbxpro com Proof of purchase is considered to be the responsibility of the consumer A copy of the original purchase receipt must be provided for any warranty service 2 dbx warrants this product when bought and used solely within the U S to be free from defects in materials and workmanship under normal use and service 3 dbx liability under this warranty is limited to repairing or at our discretion replacing defective materials that show evidence of defect provided the product is returned to dbx WITH RETURN AUTHORIZATION from the factory where all parts and labor will be covered up to a period of two years A Return Authorization number must first be obtained from dbx The company shall not be liable for any consequential damage as a result of the product s use in any circuit or assembly 4 dbx reserves the right to make changes in design or make additions to or improvements upon this product without incurring any obligation to install the same additions or improvements on products previously manufactured 5 The foregoing is in lieu of all other warranties expressed or implied
9. d Outputs Frequency Response of 10 Hz to gt 50 kHz Dynamic range of greater than 112 dB Inspection Verify that the equalizer s package contains the following Equalizer unit matching serial number marked on package AC power cord Operation Manual Registration Card Four rack mount screws and washers If any of these items are missing please contact dbx customer service at the number provided on the back cover of this manual s 231s Dual Channel 31 Band Graphic EQ Input Gain Control This control sets the signal level to the equalizer It is capable of 12 dB to 12 dB of gain Its effect is apparent by viewing the OUTPUT LEVEL BAR GRAPH EQ Bypass This switch removes the graphic equalizer section from the signal path The BYPASS switch does not however affect the INPUT GAIN or LOW CUT filters EQ Bypass LED This red LED lights when the EQ is in bypass mode Note that bypass mode only effects the graphic equalizer section of the 2 Series EQs The input gain and and low cut con trols remain unaffected when the EQ is bypassed Boost Cut Range Selection Switch and LEDs This switch selects which of the two boost cut ranges the equalizer will use either 6 dB or 12 dB The red LED lights when the 12 dB range is selected Output Level Bar Graph These four LEDs indicate output level of the equalizer Th
10. e red LED is 3 dB below clip ping and is marked as 18 dBu It monitors the level at the output of the equalizer after all other processing Clip LED This LED lights whenever any internal signal level reaches 3 dB below clipping which may occur when any of the following happen 1 the input signal is hotter than 18 dBu 2 excessive gain is applied by the input gain control or 3 excessive boost is applied using the frequency sliders Frequency Band Slider Controls Each one of these slider potentiometers will boost or cut at its noted frequency by 6 dB or 12 dB depending upon the position of the BOOST CUT RANGE switch When all the sliders are in the center detented position the output of the equalizer is flat The frequency band centers of the 131s and 231s are marked at 1 3rd of an octave intervals on ISO standard spacings while the frequency band centers of the 215s are marked at 2 3rds of an octave intervals on ISO standard spacings Low Cut Enable Switch The LOW CUT switch inserts or removes the 12 dB per octave 50 Hz low cut filter from the signal path When the LOW CUT switch is pushed in the LOW CUT filter is IN the audio path Section 3 Connecting the EQ to Your System The 2 Series Equalizers have balanced inputs and impedance balanced outputs that can be used with any balanced or unbalanced line level device To connect the equalizer to your sound system refer to the following steps Turn off all equipment
11. fiers or the crossover if there is one Adjust the level and equalization as required to yield the desired system response For optimum signal to noise response the gain structure of the sound system must be properly set up Each component of the sound system should be set at its nominal oper ating level starting with the first element in the system usually a mixing console Each element should be run at its nominal operating level in order to take advantage of the maximum signal to noise properties of that element Loudspeaker amplifiers as the last element in the chain should be set only as loud as necessary in order to avoid inducing unnecessary noise into the system 10 2 Series Specifications Inputs Connectors Type Impedance Max Input Level CMRR Outputs Connectors Type Impedance Max Output Level System Performance Bandwidth Frequency Response Dynamic Range Signal to Noise THD Noise Interchannel Crosstalk Function Switches EQ Bypass Low Cut Range Power Supply Operating Voltage Power Consumption Mains Connection Physical Dimensions 231s 215s 131s User Manual 1 4 TRS female XLR pin 2 hot Electronically balanced unbalanced RF filtered Balanced 40 kQ unbalanced 20 kQ gt 21 dBu balanced or unbalanced gt 40 dB typically gt 55 dB at 1 kHz 1 4 TRS male XLR pin 2 hot Impedance balanced unbalanced RF filtered Balanced 100 O unbalanced 50 Q
12. inuously eur Ao 66 j CHANNEL 2 215s Dual Channel 15 Band Graphic EQ CHANNEL Z CHANNEL 1 231s Dual Channel 31 Band Graphic EQ Power Cord Receptacle Connects AC power to the equalizer Output Connectors Two types of output connectors are provided for output connections male XLR type connectors and 1 4 tip ring sleeve phone jack connectors Input Connectors Two types of input connectors are provided for input connections female locking XLR type connectors and 1 4 tip ring sleeve phone jack connectors The maximum input level that the equalizer can accept is typically 22 dBu ref 0 775Vrms Section 5 Installation Considerations Hookups and Cabling The 2 Series Equalizers are designed for nominal 4 dBu levels The equalizers can be used with either balanced or unbalanced sources and the out puts can be used with either balanced or unbalanced loads provided the proper cabling is used A balanced line is defined as two conductor shielded cable with the two center conduc tors carrying the same signal but of opposite polarity when referenced to ground An unbalanced line is generally a single conductor shielded cable with the center conduc
13. ire technical support contact dbx Technical Support Be prepared to accurately describe the problem Know the serial number of your device this is printed on a sticker attached to the chassis If you have not already taken the time to fill out your warranty registration card and send it in please do so now You may also register online at www dbxpro com Before you return a product to the factory for service we recommend you refer to the manual Make sure you have correctly followed installation steps and operation procedures For further technical assistance or service please contact our Technical Support Department at 801 568 7660 or visit www dbxpro com If you need to return a product to the factory for service you MUST first contact Technical Support to obtain a Return Authorization Number No returned products will be accepted at the factory without a Return Authorization Number Please refer to the Warranty information on the following page which extends to the first end user After expiration of the warranty a reasonable charge will be made for parts labor and packing if you choose to use the factory service facility In all cases you are responsible for transportation charges to the factory dbx will pay return shipping if the unit is still under warranty Use the original packing material if it is available Mark the package with the name of the shipper and with these words in red DELICATE INSTRUMENT FRAGILE Insure the pa
14. lled with the correct polarity Discard used batteries according to manufacturer s instructions ADVARSEL Lithiumbatteri Eksplosjonsfare Ved utskifting beny ttes kun batteri som anbefalt av apparatfabrikanten Brukt batteri returneres apparatleverandoren ADVARSEL Lithiumbatteri Eksplosionsfare ved fejlagtig handter ing Udskiftning m kun ske med batteri av samme fabrikat og type Lev r det brugte batteri tilbage til leverand ren VAROITUS Paristo voi r j ht jos se on virheellisesti asennettu Vaihda paristo ainoastaan laitevalmistajan suosit telemaan tyyppin H vit k ytetty paristo valmistajan ohjeiden mukaisesti VARNING Explosionsfara vid felaktigt batteribyte Anv nd samma batterityp eller en ekvivalent typ som rekom menderas av apparattillverkaren Kassera anv nt bat teri enligt fabrikantens instruktion ELECTROMAGNETIC COMPATIBILITY This device complies with part 15 of the FCC Rules and the Product Specifications noted on the Declaration of Conformity Operation is subject to the following two conditions e this device may not cause harmful interference and e this device must accept any interfer ence received including interference that may cause undesired operation Operation of this unit within significant electromagnetic fields should be avoided use only shielded interconnecting cables U K MAINS PLUG WARNING A molded mains plug that has been cut off from the co
15. rd is unsafe Discard the mains plug at a suitable disposal facility NEVER UNDER ANY CIRCUMSTANCES SHOULD YOU INSERT A DAMAGED OR CUT MAINS PLUG INTO A 13 AMP POWER SOCKET Do not use the mains plug without the fuse cover in place Replacement fuse covers can be obtained from your local retailer Replacement fuses are 13 amps and MUST be ASTA approved to BS1362 DECLARATION OF CONFORMITY Manufacturer s Name dbx Professional Products Manufacturer s Address 8760 S Sandy Parkway Sandy Utah 84070 USA declares that the product Product name dbx 131S 215S 231 231S Note Product name may be suf fixed by the EU Product option None conforms to the following Product Specifications Safety IEC 60065 01 Amd EMC EN 55022 2006 EN 55024 1998 FCC Part I5 Supplementary Information The product herewith complies with the requirements of the Low Voltage Directive 2006 95 EC EMC Directive 2004 108 EC RoHS Directive 2002 95 EC WEEE Directive 2002 96 EC With regard to Directive 2005 32 EC and EC Regulation 1275 2008 of 17 December 2008 this product is designed produced and classified as Professional Audio Equipment and thus is exempt from this Directive Roger Johnsen Vice President of Engineering 8760 S Sandy Parkway Sandy Utah 84070 USA Date August 16 2010 European Contact Your local dbx Sales and Service Office or Harman Music Group 8760 South Sandy Parkway Sandy Ut
16. tor carrying the signal and the shield at ground potential Input Cable Configurations The equalizer has an input impedance of 40 kQ balanced and 20 kQ unbalanced This makes the 2 Series Equalizers audio inputs suitable for use with virtually any low source impedance under 2 kQ Output Cable Configurations The equalizer s output is capable of driving down to a 2 kQ load to at least 21 dBu For maximum hum rejection with a balanced source avoid common grounding at the equalizer s inputs and outputs Most balanced 3 con ductor cables have the shield connected at both ends This can result in ground loops which cause hum If hum persists try disconnecting the shield on one or more of the cables in the system preferably at the input of a device not at the output Section 6 Operation and Application Notes The dbx 2 Series Graphic Equalizers are useful audio signal processing tools in situations where precise frequency control is required across the audible frequency spectrum When used with an audio spectrum analyzer the EQs can tune any acoustical environ ment from the studio to the concert hall to stop ringing increase clarity and tailor the overall frequency response of the environment A real time spectrum analyzer or other types of audio environment analyzers are very useful in determining the amount of equalization needed Insert the graphic equalizer between the signal source usually a mixer and the power ampli
17. ug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped POWER ON OFF SWITCH If the equipment has a Power switch the Power switch used in this piece of equipment DOES NOT break the connection from the mains MAINS DISCONNECT The plug shall remain readily operable For rack mount or installation where plug is not accessible an al pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated into the electrical installation of the rack or building FOR UNITS EQUIPPED WITH EXTERNALLY ACCESSIBLE FUSE RECEPTACLE Replace fuse with same type and rating only MULTIPLE INPUT VOLTAGE This equipment may require the use of a different line cord attachment plug or both depending on the available power source at installation Connect this equipment only to the power source indicated on the equipment rear panel To reduce the risk of fire or electric shock refer servicing to qualified service personnel or equivalent If connected to 240V supply a suitable CSA UL certified power cord shall be used for this supply IMPORTANT SAFETY INSTRUCTIONS LITHIUM BATTERY WARNING CAUTION This product may contain a lithium battery There is danger of explosion if the battery is incorrectly replaced Replace only with an Eveready CR 2032 or equivalent Make sure the battery is insta
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