DBX-User manual-231
Contents
1. PIN2 PRI s amp SLEEVE 7 PIN3 Eee ce x CE 120V 60Hz Moi JALIZER c uS pepy 5 231 Dual Channel 31 Band Graphic EQ Power Switch 231 only Switches the power on and off Always make audio con nections with the power switch in the OFF position Power Cord Receptacle Connects AC power to the equalizer Output Connectors Two types of output connectors are provided for output con nections male XLR type connectors and 1 4 tip ring sleeve phone jack connectors Input Connectors Two types of input connectors are provided for input connec tions female locking XLR type connectors and 1 4 tip ring sleeve phone jack con nectors The maximum input level that the equalizer can accept is 22dBu ref 0 775Vrms INSTALLATION CONSIDERATIONS Hookups and Cabling The 2 Series Equalizers are designed for nominal 4dBu lev els The equalizers can be used with either balanced or unbalanced sources and the outputs 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 con ductors 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 conductor carrying the signal and the shield at ground potential Input Cable Configurations The equalizer has an input impedance of 40k bal anced and 20kQ unbalanced This makes th2. Ab x nrssou moner Serjes Graphic Equalizer s N N e UU UJ m Ole IMPORTANT SAFETY INSTRUCTIONS RISK OF ELECTRIC SHOCK DO NOT OPEN A A ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE The symbols shown above are internationally accepted symbols that warn of potential hazards with electrical products The lightning flash with arrowpoint in an equi lateral triangle means that there are dangerous voltages present within the unit The exclamation point in an equi lateral triangle indicates that it is necessary for the user to refer to the owner s manual These symbols warn that there are no user serviceable 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 manufacturer 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 THISAPPLIANCE MUST BE EARTHED The cores in the mains lead are coloured in accordance with the following code GREEN andYELLOW Earth BLUE Neutral BROW N Live As colours of the cores in the mains lead of this applia
3. ES 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 all pole mains switch with a contact separation of at least 3 mm in each pole shall be incor por ated 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 M ULTIPLE INPUT VOLTAGE This equipment may require the use of a different line cord attachment plug or both depending on the available power source at instal ation 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 This Equipment is intended for rack mount use only IMPORTANT SAFETY INSTRUCTIONS LITHIUM BATTERY WARNING CAUTION This product may contain a lithium battery There is dan ger of explosion if the battery is incorrectly replaced Replace only with an Eveready CR 2032 or equivalent Make sure the battery is installed with the correct polari ty Discard used batteries according to manufacturer s instructions ADVARSEL Lithiumbatteri Eksplosjonsfare Ved utskifting benyttes kun batteri som anbefalt av apparatfabrikanten Brukt bat teri returneres apparatleverandgren ADVARSEL Lithiumbatteri Eksplosi
4. HEAT SOURCES SUCH AS RADIATORS HEAT REGISTERS STOVES OR OTHER APPARATUS INCLUDING AMPLIFIERS THAT PRODUCE HEAT ONLY USE ATTACHM ENTS 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 polar ized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or third prong are pro vided for your safety If the provided plug does not fit your outlet consult an elec trician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs con venience 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 caution when moving the car t appar atus combination to avoid injury from tip over Refer all servicing to to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the appa ratus has been exposed to rain or moisture does not oper ate normally or has been dropped POWER ON OFF SWITCH The Power switch used in this piece of equipment DO
5. ared to accurately describe the problem Know the serial number of your unit this is printed on a sticker attached to the top panel If you have not already taken the time to fill out your warranty registration card and send it in please do so now 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 opera tion procedures If you are still unable to solve a problem contact our Customer Service Department at 801 568 7660 for consultation If you need to return a product to the factory for service you MUST contact Customer Service 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 FRAG ILE Insure the package properly Ship prepaid not collect Do not ship parcel post 2 Ser les yor Warranty This warranty is valid on
6. d 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 dbx 131 215 and 231 Product name may be suffixed by the EU Product name N ote Product option None conforms to the following Product Specifications Safety IEC 60065 1998 EMC EN 55013 1990 EN 55020 1991 Supplementary Information The product herewith complies with the requirements of the Low Voltage Directive 72 23 EEC and the EMC Directive 89 336 EEC as amended by Directive 93 68 EEC Vice President of Engineering 8760 S Sandy Parkway Sandy U tah 84070 U SA D ate A pril 19 2002 European Contact Your local dbx Sales and Service O ffice or Harman Music Group 8760 South Sandy Parkway Sandy Utah 84070 USA Ph 801 566 8800 Fax 801 568 7583 User Manual 2 Ser ies Table of Contents DAL LIC snua ra aAa k 3 Service Contact Info essssssesseserrrrrrrssssesrererrersssses 4 W e 5 Introduction and Features ccccccccccsccsceceeeeeeens 6 Opera ng Conto lS ar 7 Connecting the EQ to your systeM 00 8 Rear Panel DeSCTIPtiONS cccceeeeseccescseeeeeeeeens 8 Installation Considerations cccccesccssscsseeeeeeeeens 9 Operation and Applications Notes 9 BD OC a ONS sea an aen 10 Service Info If you require technical support contact dbx Customer Service Be prep
7. e 2 Series Equalizers audio inputs suit able for use with virtually any low source impedance under 2kQ2 Output Cable Configurations The equalizer s output is capable of driving a 2kQ load to 18dBu For maximum hum rejection with a balanced source avoid common grounding at the equalizer s inputs and outputs Most balanced 3 conductor 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 OPERATION AND APPLICATION NOTES The dbx 2 Series Graphic Equalizers are useful audio signal processing tools in situa tions where precise frequency control is required across the audible frequency spec trum When used with an audio spectrum analyzer the EQs can tune any acoustical envi ronment from the studio to the concert hall to stop ringing increase clarity and flatten the overall frequency response of the environment A real time spectrum ana lyzer or other types of audio environment analyzers are very useful in determining the amount of equalization needed User Manual 2 Series Insert the graphic equalizer between the signal source usually a mixer and the power amplifiers 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 gai
8. graphic equalizer section in the sig nal path Activates the 50Hz 12dB octave high pass filter Selects either 6dB or 12dB slider boost cut range 100VAC 50 60Hz 120VAC 60Hz 230VAC 50 60Hz 12W 231 15W IEC receptacle Size 3 5 Hx19 Wx6 D Weight 6 lbs Size 1 75 Hx19 Wx6 D Weight 4 7 lbs size 1 75 Hx19 Wx6 D Weight 4 7 lbs Note Specifications subject to change 10 dbx PROFESSIONAL PRODUCTS The Professional s Choice In Signal Processing 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 www blueseries com H A Harman International Company 18 1333 A
9. hot ter than 22dBu 2 excessive gain is applied by the input gain control or 3 exces sive 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 6dB or 12dB 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 131 and 231 are marked at 1 3rd of an octave intervals on ISO standard spacings while the frequency band centers of the 215 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 18dB octave 40Hz low cut filter from the signal path When the LOW CUT switch is pushed in the LOW CUT filter is IN the audio path 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 eTurn off all equipment before making connections e 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 tem peratures should not exceed 113 F 45 C when equipment is in use Although the unit s chassis is
10. ly 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 Proof of purchase is considered to be the burden of the consumer 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 OO 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 3 years A Return Authorization number must be obtained from dbx by telephone 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 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 i
11. n 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 Front Panels 231 Dual Channel 31 Band Graphic EQ Input Gain Control This control sets the signal level to the equalizer It is capable of 12dB to 12dB 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 ee and and LOW CUT controls remain unaffected when the EQ is ypassed Boost C ut Range Selection Switch and LEDs This switch selects which of the two boost cut ranges the equalizer will use either 6dB or 12dB The red LED lights when the 12dB range is selected Output Level Bar Graph These four LEDs indicate output level of the equalizer The red LED is 3dB below clipping and is marked as 18dBu 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 3dB below clip ping which may occur when any of the following happen 1 the input signal is
12. n structure of the sound system must be properly set up Each component of the sound system should be set at its nominal operating 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 SPECIFICATIONS In 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 231 21 5 ISl 1 4 TRS female XLR pin 2 hot Electronically balanced unbalanced RF filtered Balanced 40kQ unbalanced 20kQ gt 21dBu balanced or unbalanced gt 40dB typically gt 55dB at 1kHz 1 4 TRS male XLR pin 2 hot Impedance balanced unbalanced RF filtered Balanced 1009 unbalanced 502 gt 21dBu balanced unbalanced into 2kQ or greater gt 18dBm balanced unbalanced into 6009 20Hz to 20kHz 0 5 1dB lt 10Hz to gt 50kHz 0 5 3dB 108db 90db lt 0 004 lt 80dB 20Hz to 20kHz Bypasses the
13. n the performance of this warranty due to causes beyond their control User Manual 2 Ser ies Congratulations on your purchase of a dbx 2 Series Graphic Equalizer The 2 Series represents a major step forward in the performance of entry level graphic equalizers From their amazing 10Hz to 50kHz frequency response to its 108dB dynamic range internal torodial transformer 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 dbx signal processors that are the Professional s Choice With such afford able quality there s no longer any excuse for compromising your sound The 2 Series Equalizers include the following features e 131 One 31 band 1 3 octave Constant Q frequency bands 215 Two 15 band 2 3 octave Constant Q frequency bands 231 Two 31 band 1 3 octave Constant Q frequency bands Switchable boost cut ranges of 6 or 12 dB 12 dB per octave 50Hz low cut filter Front panel bypass switch 12 dB input gain range 4 segment LED ladders for monitoring output levels XLR and TRS Inputs and Outputs Internal Toroidal Transformer Frequency Response of lt 10Hz to gt 50kHz Dynamic range of greater than 108dB INSPECTION Verify that the equalizer s package contains the following Equalizer unit matching serial number marked o
14. nce may not correspond with the coloured markings identifying the ter minals 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 aera 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 PLEASE READ THE FOLLOWING KEEP THESE INSTRUCTIONS HEED ALL WARNINGS FOLLOW ALL INSTRUCTIONS DO NOT USE THIS APPARATUS NEAR WATER 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
15. onsfare ved fejlagtig handtering U dskiftning ma 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 suosittelemaan tyyppin H avita kaytetty paristo valmistajan ohjeiden mukaisesti VARNING Explosionsfara vid felaktigt batteribyte Anvand samma bat terityp eller en ekvivalent typ som rekommenderas av apparattillverkaren Kassera anv nt batteri enligt fabrikan tens instruktion ELECTROMAGNETIC COMPATIBILITY This unit conforms to 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 e use only shielded interconnecting cables U K MAINS PLUG WARNING A molded mains plug that has been cut off from the cord 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 approve
16. shielded against radio frequency and electromagnetic inter ference extremely high fields of RF and EMI should be avoided e Make audio connections via XLR or 1 4 TRS jacks according to applica tion 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 conductor 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 parallel load is greater than 2kQ n 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 e Apply power to the equalizer Connect the AC power cord to the AC power receptacle on the back of the equalizer Route the AC power cord to a convenient power outlet away from audio lines The unit may be turned on and off from the rear panel power switch or a master equipment power switch 231 only Since the 2 Series Equalizers consume a relatively small amount of power the units may be left on continuously REAR PANEL DESCRIPTIONS Rear Panels POWER ouTPuUT CHANNEL2 gt gpm ee ouTPuT CHANNEL 1 Ly a a OR POLARI ol INPUT ww TF a hi eo RING
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