Sound Performance Lab Audio Equalizer 9629 User's Manual
Contents
1. minimize switching noise and transients the circuitry is switched in and out after the balancing stages The POWER switch activates the relay hard bypass circuitry which is also activated when a power failure occurs on the primary or secondary side of the power supply Special care has gone into the design of the power supply of the Auto Dynamic De Esser because the power supply is the heart of any electronic system and the better it is the better the whole system works In an audio system this translates into better sound quality lower noise and lower distortion The power supply is based around a specifically produced 15VA torroidal transformer and is designed to minimize induced hum and noise due to the lack of an air gap The primary voltage may be selected between 230 V 50 Hz and 115V 60Hz by means of a recessed slide switch on the rear panel A rear panel ground lift switch is fitted for use where ground loops are causing hum problems When the GND Lift switch is pressed the circuit ground is isolated from the chassis ground The detachable power cord is a standard 3 wire type fitted with an IEC mains connector the transformer power cord and mains connector have VDE UL and CSA approvals The fuse has a value of 200mA 230V and 400 mA 115 V for the primary voltage On the secondary side of the power supply an RC combination is used to filter out noise and hum voltages Both half waves are smoothed with 2 x 1000 pF capacitors in2. original packaging or a replacement supplied by SPL with all transportation costs and full insurance paid each way by the purchaser or owner All remedies and the measure of damages are limited to the above services It is possible that economic loss or injury to person or property may result from the failure of the product however even if SPL has been advised of this possibility this limited warranty does not cover any such consequen tial or incidental damages Some states or countries do not allow the limita tions or exclusion of incidental or consequential damages so the above limi tation may not apply to you Any and all warranties expressed or implied arising by law course of dealing course of performance usage of trade or otherwise including but not limited to implied warranties of merchantability and fitness for parti cular are limited to a period of 1 one year from either the date of manufac ture Some states or countries do not allow limitations on how long an implied warranty lasts so the above limitations may not apply to you This limited warranty gives you specific legal rights and you may also have other rights which vary from state to state country to country SPL electronics GmbH D 41372 Niederkr chten Germany AUTO DYNAMIC DE ESSER Warranty pl gt
3. output stage using all laser trimmed resistors with a tolerance of 0 01 This approach has resulted in an exceptionally high CCMR common mode rejection 100dB at 1kHz and 80dB at 10kHz As a precaution before connecting the Auto Dynamic De Esser switch off power of the unit and of all units to be connected E OS ELECTRIQUE NE FAS OUVE cold 3 N SERAL nsicor eLecmic sHock y Pra VA AN PINETA is mS VOLTAGE SELECTOR Pin wiring XLR input hot 3 Rear panel Balanced XLR and TRS stereo jack I Os 6 dB Voltage selector 230 V 50 Hz or 115 V 60 Hz GND 2 1 GND Lift switch CSA UL approved 3 pole power plug AUTO DYNAMIC DE ESSER Control Elements S REDUCTION S Reduction 2 Auto Threshold 6 L 20 16 12 8642dB OOO AUTO MALE THRESHOLD FEMALE ACTIVE DUAL CHANNEL AUTO DYNAMIC DE ESSER S Reduction controls the intensity of the de essing effect The LED display shows the gain reduction of S frequencies in a range between 0dB to 20dB in 2dB steps S REDUCTION adjustments between 3 and 7 have proven to create best results in practical applications AUTO THRESHOLD activates a new function that automatically readjusts the threshold when the input gain varies due to varying distances of the speaker to the microphone The de essing remains on a constant level when Auto Threshold is activated status LED illuminated Especially with u
4. the positive and 2 x 1000 pF capacitors in the negative voltage supply path and both lines use precision voltage regulators for optimum stability Deviations of only a few millivolts can impair audio quality introducing artifacts such as loss of stereo imaging or a diffuse sound character Particular care has gone into the circuit layout and component choice to minimize crosstalk between the audio circuitry and control voltages AUTO DYNAMIC DE ESSER Control Elements 3 Male Female 4 Active Power Supply L 7 Specifications 8 L Input amp Output Instrumentation amplifier electronically balanced differential transformerless Nominal input IeVel s cree 6 dB Input impedance esssesssssesssecsseceseecseesseeeees 22 kOhms Outputimpedance cerre lt 600 Ohms Max INPUt level ou essessessssesseessesstesseesseestesseess 24 dBu Max output level csccerccerenee 22 4 dBu Minimum load Ohms sssssssssssssssssssssssorsrsrsrsesee 600 Ohms Hard Bypass Relay Power Fail Safety Measurements Frequency response nnt 20 Hz 50 kHz 50 kHz 3 dB CCMR common mode rejection 80 dBu 1kHz THD Na 0 002 1kHz S N COIRAGS 3 slo 93 dBu S N A weightened 106 dBu Power Supply Torroidal transformer urire 15 VA FUSE iii 200mA Ground Lift switch ciato yes
5. D DI soundperformancelab com Manual Be sine TON Fusina roma LP minii 1 ea miii 2 DE ESSER C mio Bile seme gt am a ze O O SITO FMI Ha PERFORMANCE UTO DYNAMIC E DE ESSER LABORATORY MODE AUTO DYNAMIC DE ESSER Model 9629 O O Dual channel De Esser Manual Auto Dynamic De Esser Modell 9629 Version 4 0 5 2000 R amp D Wolfgang Neumann Written by Hermann Gier amp Paul White The information in this document has been carefully verified and is assumed to be correct However Sound Performance Laboratory SPL reserves the right to modify the product described in this manual at any time Changes without notice This document is the property of SPL and may not be copied or reproduced in any manner in part or full without the authorization of SPL Limitations of Liability In no event will SPL be liable for any damages including loss of data lost profits cost of cover or other special incidental consequential or indirect damages arising from the use of the unit however caused and on any theory of liability This limitation will apply even if SPL or an authorized dealer has been advised of the possibility of such damage Sound Performance Lab P O Box 12 27 D 41368 Niederkr chten Germany Tel 49 2163 98340 Fax 49 2163 983420 E Mail info soundperformancelab com www soundperformancelab com CE 2000 SPL electronics GmbH All ri
6. SSER Connections Switch off power of all units to be connected before you connect the Auto Dynamic De Esser The Auto Dynamic De Esser is fitted with both XLR connectors and TRS stereo jacks for balanced operation though the jacks may be used with unbalanced connections simply by plugging in mono jack plugs The level difference that normally occurs when a balanced input or output is used unbalanced is automatically compensated for Should the need arise to use the XLR connectors in an unbalanced system pin 3 of the XLRs should be grounded Inserting a mono jack also unbalances the XLRs Input balanced unbalanced balanced unbalanced 1 GND 2 hot 3 cold Both output stages operate in parallel so it is possible to connect two diffe rent destination units simultaneously for example to record to two different media at the same time or split the output between a mixer and effects processor However only one type of input jack or XLR should be connected at a time the Auto Dynamic De Esser is not intended to be used as a mixer GND cold Sleeve z 6 2 v v O x v LJ o v v g n a E B a hot Ring Tip XLR WIRING JACK WIRING Tip O GND cold 3 Pin wiring XLR output hot 3 E a e e 1 GND 2 TT n gt in a Sie To ensure optimal signal quality SPL has developed a new hybrid compo nent balanced input
7. Voltage selector AAA yes Dimensions HOUSING mirra Standard EIA 19 1U 482 x 44 x 237mm A 3 4kg Note 0 dBu 0 775 V Subject to change without notice AUTO DYNAMIC DE ESSER SPL electronics GmbH hereafter called SPL products are warranted only in the country where purchased through the authorized SPL distributor in that country against defects in material or workmanship The specific period of this limited warranty shall be that which is described to the original retail purchaser by the authorized SPL dealer or distributor at the time of purchase SPL does not however warrant its products against any and all defects 1 arising out of materials or workmanship not provided or furnished by SPL or 2 resulting from abnormal use of the product or use in violation of instruc tions or 3 in products repaired or serviced by other than authorized SPL repair facili ties or 4 in products with removed or defaced serial numbers or 5 in components or parts or products expressly warranted by another manufacturer SPL agrees through the applicable authorized distributor to repair or replace defects covered by this limited warranty with parts or products of original or improved design at its option in each respect if the defective product is shipped prior to the end of the warranty period to the designated authorized SPL warranty repair facility in the country where purchased or to the SPL factory in Germany in the
8. ency back into the signal path The S frequency is cancelled out Therefore the quality of De Essing is significantly improved the result is neutrality to the sound and an unobtrusive but very effective mode of operation There are almost no negative side effects on the timbre and character of the voice even while using a high intensity of S Reduction Installation amp Security Advices CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR 4 sal The housing of the Auto Dynamic DeEsser has the standard 19 EIA format and occupies 1U 44 45 mm in your rack When installing the unit in a 19 rack the rear side of the unit needs some support especially in a touring case The Auto Dynamic DeEsser should not be installed directly above or below power amplifiers or near units which produce strong magnetic fields or extreme heat Check that the voltage details quoted on the back panel are the same as your local mains electricity supply Use a minus screwdriver to set the voltage selector to the appropriate value Never cover up the ventilation slots on the top of the unit If during opera tion the sound is interrupted or indicators no longer illuminate or if abnormal odor or smoke is detected or if liquids are spilled on the unit immediately disconnect the power cord plug and contact your dealer Only clean the Auto Dynamic DeEsser with a soft lint free cloth AUTO DYNAMIC DE E
9. ghts reserved Subject to change without notice AUTO DYNAMIC 2 L DE ESSER OPE WOM iaia 3 Thanks E E m a a a a 3 NtOUCHON iii is 4 Installation amp Security Advices n 4 CONNECTIONS sila it 5 Control Elements S REGUCTION sii tad 6 Auto Threshold iuarinaninlani ani 6 Male Female naci ado 7 ACUVS circa 7 Powersupply urraca cosa 7 SpecificatiONS avion ii aci n 8 WAIT asii io 9 NOS iia tcs 10 Dear customer congratulations on purchasing the SPL Auto Dynamic De Esser You have decided to use a high performance tool which sets you in the position to have faster success and a better sound quality in your music productions As a typical SPL unit the Auto Dynamic De Esser combines exemplary specifications and high manufacturing standard with excellent sound quality to provide you a precious component for studio and PA purposes Please read this manual carefully to ensure you have all the information you need to use the Auto Dynamic De Esser We wish you every success with the Auto Dynamic De Esser Your Sound Performance Lab Team would like to start with my thanks to all our staff who created what is to be described here The importance of their exceptional qualification and talents can t be overestimated But the biggest thanks owe their unbelievable engagement creativity and productivity in realizing our projects Our products are often tested and compared in many publications and by our custo
10. mers themselfs and constantly valued with best results would like to pass on this broad appreciation to those who deserve it my excellent colleagues Hermann Gier AUTO DYNAMIC DE ESSER Contents Foreword Thanks pl gt Introduction The Auto Dynamic De Esser is a highly specialized audio tool It is used to reduce S frequency of speakers and singers It should perform without disturbing natural character and timbre of the voice This is not an easy task SPL has developed a new circuit design that combines ease of use with natural sounding and effective performance How do traditional De Essers work Traditional De Essers use compressor technology The control elements are a threshold control and a frequency control The threshold sets the level at which de essing starts and the frequency control sets the center frequency of a frequency band that is usually up to 3 4 kHz wide Any S frequency within that band causes the compressor to compress the entire frequency band As a result the voice speaks through the noise or lisps How does SPL s Auto Dynamic De Esser work The Auto Dynamic De Esser utilizes a new circuit design that scans the frequency spectrum and automatically hones in on S frequencies Only these narrow band frequencies are processed and adjacent frequencies are left untouched The Auto Dynamic De Esser reduces S frequencies by feeding a phase inversed signal of the detected narrow band S frequ
11. ntrained speakers or in live applications the distance to the microphone sometimes varies dramatically De essers operating with common compressor technology change their de essing intensity with varying input levels As a de esser should be used right after the microphone preamplifier and in front of a compressor limiter common de essers produce negative side effects on the vocals such as speaking through the nose or lisping The Auto Threshold function gets rid of all these problems No matter how much the input level varies the de essing is proportionally the same and a following compressor limiter works better and more efficient AUTO DYNAMIC DE ESSER The Male Female switch lets you select two different operation modes The female mode is chosen when the switch is pressed and the status LED illu minates The automatic S frequency recognition is set to the characteristics of female voices The opposite position of the button switches to the male mode The S frequency recognition is then set to the characteristics of male voices However it may sometimes be necessary to use the MALE mode and female vocals and vice versa The selection of this switch is largely depen ding on the character of the S frequency The center frequency of the bandwidth where the Auto Dynamic De Esser looks for S frequencies is located at 6 kHz for male voices and around 7 kHz for female voices ACTIVE switches each channel in and out of processing In order to
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