Nady Systems PEQ-5B User's Manual
Contents
1. J BAND PARAMETRIC EQUALIZER OWNERS MANUAL S BAND PARAMETRIC EQUALIZER KDI Congratulations You have purchased one of the finest professional para metric equalizers on the market today This unit was Date of Purchase Dealer s Name developed using the expertise of professional sound City engineers and working musicians You will find your new NADY AUDIO PEQ 5B has superior performance and State Zip greater flexibility than any other parametric equalizer in its price range Please read this manual carefully to get Model the most out of your new unit Thanks for selecting NADY AUDIO as your choice in parametric equalizers Serial Contents CONTENTS na ah linen alas Ds 2 WARNING nianen rie aE 3 FEATURES aaa ET erate 4 INSTALLA MON SS O O O NE Pr DD Pe 5 TINS pecon Ss ea aia aa 5 NN 5 3 Input Output ae 5 4 Power Connection ene le ee 5 Ds ICME LEVES N 5 6 Chassis GrOUNGING 2 ae Aaaa as o 5 CONTROLS AND CONNECTIONS as aie iie cues 6 BARE S2 E A ss ounc2. 50Hz 16 GROUND WIRE SCREW Connect a short ground wire from this screw to the grounding point for all connecting equipment in your rack see also sec tion A 6 above Chassis Grounding OPERATION 1 Parametric and Graphic Equalizers Parametric equalizers are extremely useful versatile tools in both live sound and recording applications They can enable a wide variety of tasks from gentle contouring and audio sweetening in the studio to room equalization and feedback notching in sound reinforcement The most advanced form of equalization system available the parametric equalizer allows adjustment of all three parameters required for complete con trol of equalization bandwidth frequency and amplitude boost cut While graphic equalizers only provide a series of adjacent bands for control of a specific frequency parametric equalizers allow for selecting a specific frequency directly Thus they can be used to realize complex frequency curves with highest precision Since the acoustic results obtained with parametric equalizers are not as predictable as those of graphic equalizers it is necessary to work with parametric equalizers for a while to get a feeling for the functions and the results they can achieve 2 Basic Operation of the PEQ 5B Parametric EQ The Nady PEQ 5B provides all the advantages of both para metric equalizers and narrow band notch filters Its advanced design and high performance enable equalization flexi
3. XLR and 1 4 TRS inputs and outputs Bypass switches on each channel with LED status indicators e Highly accurate 12 segment LED switchable Input Output meter e Failsafe relay with auto bypass during power failure e Single rack space 1U rugged metal housing for reliability IEC power cord socket for AC operation with internal shielded power supply external fuse and 115V 60 2 230V 50Hz AC select switch INSTALLATION To ensure years of enjoyment from your NADY AUDIO PEQ 5B Parametric Equalizer please read and understand this manual thoroughly before using the unit 1 Inspection Your NADY AUDIO PEQ 5B was carefully packed at the fac tory in packaging designed to protect the units in shipment Before installing and using your unit carefully examine the packaging and all contents for any signs of physical damage which may have occurred in transit Note Nady Systems is not responsible for shipping damage If the unit is damaged do not return to us but notify your dealer and the shipping company immediately to make a claim Such claims must be made by the consignee in a timely manner 2 Rack Mounting This model is designed for mounting in a standard 19 equip ment rack or one of the many rack type portable cases avail able on the market The unit fits in a standard 19 single rack 1 75 Install the equalizer in a rack with the rack screws provided Please allow at least an additional 4 depth for the conne
4. to eliminate feedback and correct room resonances The PEQ 5B can also be useful to help compensate for problems of poor microphone positioning and or increased intelligibility Room acoustics can also be corrected for poor speaker place ment dictated by other than pure acoustic considerations Once all the equalization has been adjusted as required by the application the INPUT control is used to set the overall level of the PEQ 5B s processed signal The signal can be raised or lowered as desired Use the IN OUT switch for a direct A B comparison as a guide for proper level adjustment 2 Use in Sound Reinforcement In typical live sound applications EQ s are used to increase the overall volume or punch of the sound while eliminating feedback enhance the natural musicality of the mix and improve the intelligibility of speech Understanding that there are always compromises that must be made care must be taken so that the overall effect of the equalization is an improvement not deterioration of the overall sound Sometimes hard decisions must be made between priorities for achieving the desired result For example it may not be possible to have a natural sound and acoustic power or speech intelligibility at the same time Although pink noise or swept sine waves are often the best way to identify problems of room acoustics and system defi ciencies especially in the critical range of 2 to 4 KHz the ear can also be used
5. 7 10 BAND FREQUENCY CONTROLS Use these controls to select the filter s center frequency in each band This can be any frequency within that band s frequency range INPUTS mwena g NADY SYSTEMS INC Emeryville CA USA REAR PANEL 11 BALANCED SIGNAL INPUT JACKS 1 4 TRS amp XLR These 1 4 TRS Tip Ring Sleeve and XLR jacks are wired for balanced input signals 0 775V OdBm 15K Ohms and signal polarity is Tip Pin 2 Cold Ring Pin 3 Hot and Sleeve Pin 1 Ground 12 BALANCED SIGNAL OUTPUT JACK 1 4 TRS amp XLR These 1 4 TRS and XLR jacks provide a balanced signal out put 600 Ohms and are wired with the same signal polarity as the Input Jacks above 13 POWER CONNECTOR The IEC cord connector is used to connect the AC power source to your power amplifier CAUTION DO NOT REMOVE THE CENTER GROUNDING PIN 14 AC FUSE HOLDERS This fuse holder contains an AC primary fuse When this fuse blows replace it with the same type fuse size and power rat ing 120 VAC 250mA 250V 230 VAC 125mA 250Y If it continuously blows stop replacing the fuse and refer servicing to qualified personnel CAUTION After checking the AC supply voltage be sure that the correct fuse is in the fuse holder 15 AC VOLTAGE SELECTOR SWITCH Before plugging in the power cord check to see that the unit is set for the proper voltage for your area 115V 60Hz or 230V
6. ICATORS INPUT OUTPUT LEVEL 12 segment LED display FUNCTION SWITCH Servo balanced input 1 4 TRS and XLR jacks 0 775 OdBm 50 K Q balanced 21 dBU balanced Servo balanced output 1 4 TRS and XLR jacks 0 775 0 dBm 21 dBu balanced 60 Q Balanced 16Hz 30KHz lt 3 0 dB gt 96 dB w ABP filter lt 0 004 4 dBU 1 KHz Gain 1 10 Hz to 400 Hz variable 6 dB octave 2 5 KHz to 30 KHz variable 6 dB octave State variable parametric filter 15 dB to 15 dB variable 20 400 Hz 60 Hz 1 Khz 150 Hz to 2 5 KHz 500 Hz to 8 KHz 1 KHz to 20 KHz Master Audio In Out Band In Out for each band 115 230 VAC power select 30 24 18 12 6 3 0 3 6 9 12 18 dB LED Indicator for every switch IN LED on POWER CONSUMPTION POWER SOURCE FUSE REQUIREMENTS POWER CONNECTOR DIMENSIONS WEIGHT 7 Watts AC 120V 230V 50 60 Hz voltage selectable 120 VAC 250 mA 250V slow blow 230 VAC 125 mA 250V slow blow standard IEC receptacle 19 X 1 75 X 7 25 483 X 44 X 184 mm 1U rack height 6 6 lbs 3 0 Kg Note For improvement purposes specifications design and appearance are subject to change without prior notice SERVICE FOR YOUR NADY AUDIO PRODUCT U S Should your NADY AUDIO product require service please contact the Nady Service Department via telephone at 510 652 2411 or E mail at service nadywireless com International For service please conta
7. NSTRUCTIONS When using electronic device basic precautions should always be taken including the following 1 2 10 11 Read all instructions before using the product Do not use this product near water e g near a bathtub washbowl kitchen sink a wet basement or near a swimming pool etc This product should be used only with a cart or stand that will keep it level and stable and prevent wobbling This product in combination with headphones or speakers may be capable of producing sound levels that could cause permanent hearing loss Do not operate for a long period of time at a high volume level or at a level that is uncomfortable If you experience any hearing loss or ringing in the ears you should consult an audiologist The product should be positioned so that proper ventilation is maintained The product should be located away from heat sources such as radiators heat vents or other devices including amplifiers that produce heat The product should be connected to a power supply only of the type described in the operating instructions or as marked on the product Replace the fuse only with one of the specified type size and correct rating The power supply cord should 1 be undamaged 2 never share an outlet or extension cord with other devices so that the outlet s or extension cord s power rating is exceeded and 3 never be left plugged into the outlet when not being used for a long period of time C
8. UDIO IN OUT SWITCH WITH LED INDICATOR This is used to enable disable the entire equalizer section in the audio path allowing A B comparisons between the processed and unprocessed signals The switch uses a relay controlled hard bypass function so that if it is not pressed in or if the unit is switched off the inputs are directly connected to the outputs The switch also selects the input or output sig nal for display on the INPUT OUTPUT LEVEL meter The LED lights when the switch is IN 4 MASTER INPUT CONTROL Use this CONTROL TO DETERMINE THE INPUT LEVEL TO THE UNIT It can be set from 15 to 15cB 5 MASTER LOW CUT CONTROL Use this control to adjust the lower cutoff frequency of the PEQ 5B The high pass filter can be tuned from 10 to 400 Hz In the 10 Hz position the signal passes unchanged 6 MASTER HIGH CUT CONTROL Use this control to adjust the upper cutoff frequency of the unit The low pass filter can be tuned from 2 5 to 30 KHz In the 30 KHz position the signal passes unchanged 7 BAND LEVEL CONTROLS Use this control to determine the amount of level boost cut for each band The setting ranges from 15 to 15 dB 8 BAND IN OUT SWITCHES WITH LED INDICATORS Use these switches to enable disable specific bands in the audio path The LED lights when the switch is IN 9 BANDWIDTH CONTROLS Use these controls to determine the Q or slope of the filter in each band Settings range from 0 03 Q 43 to 2 octaves Q 0 6
9. are should be taken so that objects do not fall into and liquids are not spilled through the enclosure s openings The product should be serviced by qualified service personnel if The power supply cord or the plug has been damaged Objects have fallen into or liquid has been spilled onto the product The product has been exposed to rain The product does not appear to operate normally or exhibits a marked change in performance The product has been dropped or the enclosure damaged Do not attempt to service the product beyond what is described in the user maintenance instructions All other servicing should be referred to qualified service personnel moO FEATURES PEQ 5B Parametric Equalizer With its advanced state of the art features and versatile utility the PEQ 5B five band parametric equalizer is a rugged work horse designed for long haul reliability in the studio and live sound reinforcement applications 15dB boost cut per band e Constant Q state variable filter circuitry for precision control of tone coloration e Parallel phase filters for minimal phase shifting e Tunable high and low cut filters for removing floor rumble tape hiss etc e Each band independently switchable and adjustable in bandwidth 03 to 2 octaves wide allowing a range of adjustment from tight notching to extreme boost attenuation by band overlapping e Constant Q state variable filters for maximum filter stability e Servo balanced
10. bility limited only by the imagination With a variable bandwidth ranging from 0 03 to 2 octaves the 5 is the most flexi ble equalizer available It is totally superior to graphic equal izers in all ways and for almost all applications from post production in audio video and broadcast studios to on stage use Each of the PEQ 5B s 5 bands can be adjusted from extreme ly narrow to broadband Its additional low and high cut filters have a slope of 6 dB octave and can be varied over a wide frequency range and enable control of the entire frequency response for your specific application With all this equaliza tion available it is easy to modify the entire spectrum of the signal being processed at once The added filters allow both high and low broadband corrections while the parametric fil ters process hum feedback and other narrow frequency band problems The PEQ 5B utilizes Constant Q filters which prevent the parameters frequency bandwidth and amplitude from affect ing each other Such independence allows more clearly defined and repeatable filter settings When several filters are used simultaneously the resulting overall filter curve can be calculated by adding subtracting the single band specific fil ter curves Conventional parametric equalizers typically employ series filters which can introduce noticeable phase shifts and delays The advanced design PEQ 5B features parallel filters which are a marked improveme
11. ct the NADY AUDIO distributor in your country through the dealer from whom you purchased this product DO NOT ATTEMPT TO SERVICE THIS UNIT YOURSELF AS IT CAN BE DANGEROUS AND ALSO WILL VOID THE WARRANTY NADY SYSTEMS INC 6701 SHELLMOUND STREET EMERYVILLE CA 94608 Tel 510 652 2411 Fax 510 652 5075 e www nadywireless com
12. ctors on the back panel Route the A C power cord to a convenient power outlet away from audio lines The unit may be turned on and off from the front panel power switch or a master equipment power switch Since the unit draws a relatively small amount of current during idle the unit may be left on continuously The PEQ 5B does not generate an unduly large amount of heat and does not need to be spe cially ventilated or cooled The unit should not be subjected however to high heat environments Although the unit s chas sis is shielded against radio frequency RF and electromag netic interference extremely high fields of RF and should be avoided 3 Input Output Connections The 1 4 TRS phone jack and XLR connector inputs and out puts can be used for balanced and unbalanced connections For balanced connection wire the connectors as follows For unbalanced operation wire the connectors as follows JACK CONNECTION JACK CONNECTION PIN 1 GROUND optional use as shielding to prevent hum 1 GROUND PIN 2 HIGH PIN 2 HIGH PIN Low 1 4 TRS JACK CONNECTION 1 4 TRS JACK CONNECTION TIP HIGH RING Low TIP HIGH SLEEVE a SLEEVE GROUND optional use as shielding to prevent hum CAUTION Using more than one connector at a time for the INPUT OUTPUT pair could unbalance balanced lines cause phase cancellation short a conductor to grou
13. e ES o TE 6 2 Rear issa aint A 7 OPERATION 8 1 Parametric and Graphic EqUualiZ rS sss 8 2 Basic Operation of the PEQ 5B Parametric Equalizer sss 8 APPLICATIONS ee as 9 1 Typical USES Sees re tore er 9 2 Use in Sound Reinforcement ss sss 10 3 Inserting the PEQ 5B the Signal path sss 10 SPECIFICATIONS eis anne pees ae one ease aes aa a 11 An equilateral triangle enclosing a lightning flash arrowhead symbol is CAUTION intended to alert the user to the presence of uninsulated dangerous RISK OF ELECTRIC SHOCK voltage within the product s enclosure which may be of sufficient DO NOT OPEN magnitude to constitute a risk of electric shock ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK 1 1 DO NOT REMOVE COVER OR BACK An equilateral triangle enclosing an exclamation point is intended to alert NO USER SERVICEABLE PARTS INSIDE the user to the presence of important operating and service instructions in the literature enclosed with this unit REFER SERVICING TO QUALIFIED SERVICE PERSONNEL IMPORTANT SAFETY I
14. encies that are to be notched out can be identified by ear although that requires some trial and error and a bit of patience or more effectively by the use of an audio spectrum analyzer Resonance frequencies can then be quickly identified enabling quick tuning of the required filters on the PEQ 5B Note If feedback notching is the only task you have planned for the PEQ 5B you should consider also the Nady FS 4N Feedback Suppressor which features 4 notching bands and a built in audio spectrum analyzer for the quickest most effec tive feedback suppression possible If a spectrum analyzer is not available to help identify trouble some frequencies it is most effective to do so by actually rais ing the gain in the narrow band filter at first to make them heard and then simply eliminating the undesirable frequen cies by subsequently lowering the level The PEQ 5B can also be used for a wide variety of other applications other than narrow band notching For example to simulate speaker crossover networks or simple tone cir cuits or even for drastic modifications such as telephone voice Since broad band frequency corrections are the most common type of equalization in live sound applications the PEQ 5B be easily utilized for this purpose by 2 or broad band parametric filters in combination with the low and high cut filters to achieve the required overall frequency equalization Then the remaining 2 or 3 bands can be used
15. ibility between your equalizer the other equipment in the same system There are several combina tions that can be attempted Note ALWAYS TURN YOUR AMPLIFIERS DOWN BEFORE CHANGING YOUR GROUNDS AROUND Try different combinations of lifting ground wires or make sure all chassis are connected to earth ground either through the A C power cord ground or by the front panel rack mount screws CONTROLS AND CONNECTIONS INPUTIOUTPUT LEvEL aBy Pe ee ee EA 965600009684 PEQ 5B 4 5 4 ott tei 5 BAND 2 4 FRONT PANEL The Nady PEQ 5B has five parametric filters organized in five different frequency bands A 12 segment LED display shows the input or output level and there is both a master low cut and high cut filter 1 POWER SWITCH To turn the unit ON or OFF press the upper or lower portion of this button 2 MASTER INPUT OUTPUT LEVEL METER DISPLAY This 12 segment LED meter is used to monitor the signal lev els so as to avoid overload distortion The display shows the input or output level as selected by the AUDIO IN OUT switch INPUT is selected with the switch pressed in The top red LED lights at a level of about 18 dB which is about 3 dB below clipping Note Extreme boost settings in combination with a high input level can cause overload clipping If this happens reduce the input level as necessary with the INPUT control 3 MASTER A
16. nd or cause damage to the other equipment connected to the equalizer 4 Power Connection The PEQ 5B is designed for operation from 120 240 volts 50 60 Hz AC supplies Power requirements for electrical equipment differ from area to area In new installations and portable sound systems or any situation in which the AC power is in question it is wise to confirm the voltage and select the appropriate line voltage switch before connecting the instrument to power sources Check to see that the unit is set to the voltage for your area by referring to the table below Europe except UK 230V 50Hz UK and Australia 240V 50Hz USA and Canada 120V 60 Hz For other areas please check with local authorities If the voltage selector is not set for your area Confirm that the power cord is not plugged into a wall outlet Move the voltage selector switch with a small screwdriver so that the marker is set to the voltage for your area 5 Signal Levels Signal levels from 21dBu to 21dBu are considered normal Do not directly connect microphones into the equalizer s inputs Microphones require a pre amp 6 Chassis Grounding The PEQ 5B is equipped with a rear panel Ground Screw This is generally connected with a short piece of wire to the chassis ground shared by the other connected equipment in the rack If after setting up your system the system exhibits excessive hum or buzzing the problem may be that there is a ground incompat
17. nt and provide optimized audio free of such undesirable artifacts Parallel filter design thus allows for more musicality in the audio processing It should be noted however that while extreme boost cut of frequencies can be realized by overlapping the frequencies of individual bands this technique must be exercised with care when using the PEQ 5B so that the musicality of the final sound image is retained The PEQ 5B enables both notching peaking and rolling off frequency bands Notching and peaking refer to specific attenuation or boosting respectively of single frequencies or bands Peaking is achieved by band pass filters and notching by notch filters Although similar in concept these two filter types achieve the exact opposite effect Rolling off is done by either high or low pass filters In the PEQ 5B these filters have a slope of 6 dB octave and can be varied within a wide frequency range amplitude 15 dBu 15 dBu frequency Fig 1 Narrow BW 03 and Wide BW 2 notch f1 f2 and peak f3 f4 filters amplitude frequency Fig 2 Roll off function APPLICATION 1 Typical Uses The PEQ 5B allows creative audio processing previously not possible with graphic or less advanced parametric equalizers by enabling the user to set all filter parameters center frequen cy bandwidth and amplitude in five separate bands These bands cover the entire 20 Hz to 20 KHz audio range and the fre
18. operate at top efficiency for the PEQ 5B to be most effective 3 Inserting the PEQ 5B in the Signal Path The PEQ 5B can be inserted in the signal path at different points depending on the setup and application of your sys tem For example it can be inserted in the line inserts of your mixer sub group inserts effects paths or between signal processors and mixer or power amps and so on Note In the event of a power supply disconnection or failure a relay built into the PEQ 5B automatically silently bypasses the unit This relay also prevents bothersome thumps when first turning on the unit For use with more complex systems such as complex sound reinforcement applications with speakers located in varying acoustic environments and utilizing delay line units for run time difference compensation it is recommended that you consult with experienced audio sound technicians or read more extensive written material on this subject as it is beyond the scope of this manual to provide more than introductory information on the use of the PEQ 5B 10 SPECIFICATIONS AUDIO INPUT CONNECTORS NOMINAL SENSITIVITY IMPEDANCE MAX INPUT LEVEL AUDIO OUTPUT CONNECTORS NOMINAL LEVEL MAX OUTPUT LEVEL IMPEDANCE FREQUENCY RESPONSE SIGNAL TO NOISE RATIO T H D LOW CUT FILTER HIGH CUT FILTER PARAMETRIC FILTERS TYPE LEVEL FREQUENCY RANGE Band 1 Band 2 Band 3 Band 4 Band 5 FUNCTION SWITCHES IND
19. quency ranges of the individual bands overlap allowing two bands to be set to one center frequency for added boost cut capability The PEQ 5B can be used both by itself or in conjunction with conventional graphic 31 or 15 band equalizers In live sound situations for example the graphic EQ can be used for the rough mix and the PEQ 5B can be used to help fine tune the overall sound One of the PEQ 5B s most useful capabilities is notching out troublesome frequencies caused by feedback in live mixing for example or hum or appliance noises in recording appli cations When such problems require extra cut than can be achieved by a single filter simply adjust two filters to the same center frequency and bandwidth Setting both LEVEL controls then to the left stop position doubles the amount of notching Similarly you can also achieve doubled boosting peaking when needed by adjusting both LEVEL controls to the right stop position Notes a Since all narrow band filters produce a slight phase shift and thus time delay of the signal care must be taken with extremely narrow and high gain settings to avoid annoying ringing sounds Always set all filters not in use to mid travel position or switch them off to minimize such effects b To avoid damaging connected equipment and cause unde sirable effects such as distortion or feedback always start with all controls set to mid travel position and all IN OUT switches OUT Troublesome frequ
20. with great effect especially if care is taken to train it to serve as a sound evaluation diagnostic tool Start by playing music or speech program material with out equalization and add it slowly so you can gauge the effects on the sound you can hear from the different settings Ultimately there is no substitute for experience in utilizing the PEQ 5B to its fullest potential Often you will find that room acoustics problems must be dealt with at the source as they cannot be fixed as effectively by using an equalizer To check out room acoustics most accu rately use either a pink noise or swept sine wave generator and a real time analyzer RTAS with a calibrated microphone and verify that the measured frequency response at various points in the room are all about the same If they are not then you may need to make corrections fo your setup check system and speaker phasing etc to minimize the variations you are measuring This can also be done with a trained ear but requires very careful concentration and considerable ear training for most effectiveness Once you have made all the improvements you can to your basic setup you can fine tune the system with the PEQ 5B Note Although equalizers are the most important acces sories in your audio system and can often deliver amazing results in improving the overall punch and sound quality of your system they cannot work miracles Ultimately the rest of your system and setup must also
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