Sound Performance Lab 9319 Stereo Equalizer User Manual
Contents
1. In 1994 the Stage Design Award was presented to SPL by the Artist magazine for the exceptionally perfor mance on stage Operation safety Important security advices please read them carefully CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR The STEREO VITALIZER is an equalizer concept which makes use of scientific psychoacoustic technology to process audio signals The unique combina tion of dynamic equalizers amplitude controlled phase correction and harmonic filtering in the STEREO VITALIZER opens up a whole new listening dimension by adapting the sound pattern to the non linearities of the human ear The STEREO VITALIZER gives the mid frequencies accurate transparency with a soft unobtrusive sound The treble and harmonics range is reworked with broadband shelving filters which focus on achieving a smooth silky sound pattem High frequencies are livened up without them sounding hard or agressive The STEREO VITALIZER uses a newly developed filter network to process the low frequency range The bass is accentuated without any risk of emphasizing the lower mid frequencies unnaturally You can choose between a dry percussive bass TIGHT or a punchy soft and very deep sound character SOFT The result is a pleasanter and livelier sound pattem with an unrivalled wealth of detail The STEREO VITALIZER is especially designed to serve the needs in mastering cutting an2. M Vitatizer RE VITALIZER INPUTS MASTER OUTPUTS L R OUTPUTS L R i COMPRESSOR Tape duplication is often made at high speed resulting in a deterioration of the high frequency spectrum of the copies By processing the output from the source machine additional brightness can be added to compen sate for deficiencies in the copying system It may also be necessary to modify the bass end as many high speed systems fail to reproduce the bass end of the spectrum faithfully In both areas the STEREO VITALIZER is both effective and simple to set up Real time duplication is getting more and more popular In that applica tion the STEREO VITALIZER offers the same advantages as described under Studio and Video amp Film Post Production The STEREO VITALIZER is perfectly suited to the production of radio jingles commercials and station idents Because of the psychoacoustic nature of the processing the treated signal will appear louder closer brighter and more intelligible than whatever was played immediately beforehand thus creating a powerful impact In commercial radio the STEREO VITALIZER can be used to process the entire on air signal helping the radio station stand out from the competi tion The integral surround processor can also be used to create a wider stereo spread which is important when most of the audience are listening on systems with a narrow speaker geometry such as is the case with in car sound and por
3. clockwise The STEREO WIDTH potentiometer controls the stereo image O Working on estabilshed inter channel phase principles the STEREO WIDTH control is be used to increase the subjective soundstage width of any stereo source The off centre signals of the stereo source are detected and fed back to the opposite channel phase inverted This effect can be applied to overall mixes as well as to single instru ments Very interesting is the spreading of the stereo image of overhead mics of drum sets or choruses or hom sections Based around a toroidal transformer the integral power supply is designed to minimize induced hum and noise due to the non existence of Po wer supp ly an air gap On the XLR jack version 9320 the primary voltage may be selected between 230V 50Hz and 115V 60Hz by means of a recessed slide switch on the rear panel The jack version is set according to local requirements The XLR jack version 9320 features a rear panel ground lift switch which may be used where ground loops are causing hum problems When the GND LIFT switch is set to off the circuit ground is no longer connected to the chassis ground The power cord connector is a 3 wire U ground stan dard IEC mains connector for a detachable power cord enclosed The unbalanced jack version 9319 has a two wire power cord obviating the need of the ground lift switch Transformer power cord and mains connector have VDE UL and CSA approvals The f
4. Signal to noise CCIR 468 Bypass 96dBu In Effekt min 78dBu Input amp output stages XLR instrumentation amplifier electronically balanced differential transformerless nominal input level 6 dB Jack unbalanced nominal input level OdB Input impedan ce XLR jack 20 kOhm Output impedance XLR 75 Ohm Output impedance jack lt 600 Ohm Input level selector LOW OdB HIGH 8dB Peak indicators illuminate 3dB before clipping Size Standard ElA 19 1U unit 482 x 44 x 237mm VVeight Model 9319 2 7kg Model 9320 3 0kg stereo Vitalizer SPL electronics GmbH hereafter called SPL products are vvarranted 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 fumished by SPL or 2 resulting from abnormal use of the product or use in violation of instructions or 3 in products repaired or serviced by other than authorized SPL repair facilities 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 au
5. Furthermore impedance problems might cause additional noise A switch on the rear panel sets the input operating level for both chan nels Two positions are available The Low position indicates that the input sensitivity of the STEREO VITALIZER is low which means high level signals can fourrert PUTE be processed at this position Conversely the HiGH position is used for low level signals as the input sensitity is high gt The unit may be run hotter if desired by switching the level setting from the HIGH to the Low working level with the proviso that the PEAK LEDs on the front panel are not regularly flashing This will achieve processing at a lower input sensitivity and will result in a more intensely processed sound Conversely in order to achieve milder processing the switch may be set from Low to HIGH P z 5 od Should the need arise to use the XLR connectors in an unbalanced system pin 3 of both the input and output connectors should be grounded po Has Note that unbalancing the output in this way will cause a level increase of fina 6dB Follow the diagram below Ja Le tn i L The Pin assignment of the XLR connectors is Pin 2 hot Lei Al cre la Inputs Outputs balanced unbalanced balanced unbalanced i ma e soma gt wiring 1 Ground 2 hot 3 cold stereo Vitalizer Applications Studio Application 1 The STEREO VITALIZER in
6. relies on a more subtle method of amplitude depending phase shifting This does not involve altering the spectral composition of the signal but it does maintain the subjective impression of loudness Moreover graphic equalizers produce comb filter effects because of the interaction between adjacent filters when broad band frequencies are raised The Mib Hi Tune filter can raise the broad band spectrum with a very linear frequency response without colouring the signal Above the MiD Hi TUNE value set the STEREO VITALIZER filters create a linear increase i e one that is adapted to the human ear This compensates any inability of our hearing as regards perceiving frequencies ranging between 5 kHz and 10 kHz The MiD Hi TUNE filter works with a wide bandwidth and always sounds musical never bell like Gradually go down from 20 kHz extreme left to lower frequencies The further down you go the brighter the sound image becomes as an increasing number of frequencies are included in the process The MiD Hi TUNE control can also be used to tone down excessively sharp sounding material by setting frequencies of 10 kHz or higher and setting the Process control on MAX Seeing as the PROCESS control is also responsible for deleting dominant mid frequencies all frequencies are gradually reduced down to the application frequency in conjunction with high starting frequencies of the MiD Hi TUNE control 5 AUDIO PRECISION SPL FR
7. to set the voltage selector to the voltage for the area in which the unit will be used Never cover up the ventilation slots on the top of the unit If during operation the sound is interrupted or indicators no longer illuminate or if abnormal odor or smoke is detected or if water is spilled on the unit immediately disconnect the power cord plug and contact your dealer or Authorized Service Center Only clean your STEREO VITALIZER with a soft lint free cloth Use only stan dard cleaning agents Never use alcohol or paint thinner because they may damage the finish stereo Vitalizer Before connecting the STEREO VITALIZER switch the power off at all Connections connected units The STEREO VITALIZER is available in two version up to autumn 1995 Version 1 unbalanced jack version mono 1 4 jacks wired tip hot Version 2 professional version with unbalanced switching mono 1 4 jacks wired tip hot and electronically balanced 3 pole XLR wired pin 2 hot connectors Unbalanced connections are preferred XLR s may remain connected Version 1 Model 9319 Version 2 Model 9320 From autumn 1995 only version 2 will be available da EE ee Insert your STEREO VITALIZER into the Master Inserts or Sub Groups Inserts of the console Never connet the STEREO VITALIZER between console and amplifier Each fader movement will result in a tonal change of the STEREO VITALIZER effect as the input sensitivity is varied
8. EQ AMPL dBu vs FREQ Hz 12 DEC 94 11 04 56 25 000 Ap 29 000 15 000 10 006 5 9000 9 0 a nn Le i 5 900 10 09 ST 15 00 I 20 90 I 25 00 E I L 20 108 i 1k 16k Z0R The PROCESS control determines the ratio between Bass and MiD Hi TUNE to the original signal The HARMONICS control is not affected by the PROCESS control The PROCESS control also determines the damping intensity of dominant mid frequencies This allows rapid adaptation to the loudness curves Fletcher Munson curves curves of equal loudness The human ear perceives the audio frequency spectrum at varying sound pressure levels very differently Perception is by no means linear The stereo Vitalizer Fig 3 Five frequency responses are shown for the MiD HIi TUNE filter at max PROCESS value and Bass at 0 1 1 kHz 2 2 kHz 3 3 5 kHz 4 8 kHz 5 20 kHz o Process 13 Control elements Control elements 14 Fig 4 The dotted line shows frequency responses fora soft Bass SOFT at varying PROCESS and a M p H TUNE of 3 5 kHz The solid line shows the phase responses which always drift only a few degrees if the PROCESS inten sity is increased The diagram shows very clearly that the mid attenua tion gets stronger as the PROCESS value increases HARMONICS Q An improved harmonic struc t
9. F STEREO VITALIZER STEREO STEREO Unser e 20 1 3 rd min PSYCHO ACOUSTIC EQUALIZER Mion Blind Ly SURROUND PROCESSOR 12 O 9 The VITALIZER ACTIVE function switches the STEREO VITALIZER on or off The VITALIZER status LED indicates that the STEREO VITALIZER has been activated ACTIVE The VITALIZER ACTIVE function is a relais hard bypass function In the event of a power failure the STEREO VITALIZER is automatically switched to hard bypass power failure safety To increase the operational safety of the monitor loudspeakers you should not switch the STEREO VITALIZER on or off at high monitor volume At high amplitudes inside the filter there may be residual charges on the swit ching contacts which may be discharged when you switch over These may become apparent as audible click sounds If applicable reduce or mute the monitor loudspeakers before switching on or off The input stages of the STEREO VITALIZER are equipped with PEAK LEDs Q vvhich light up around 3 dB before the effect signal path is potentially over driven Make sure that the PEAK LEDs only light up briefly if at all It is essential to avoid the PEAK LEDs being lit up for any length of time If they do so reduce the input level or switch from Low to HIGH on the rear of the unit The Bass control is responsible for the colour of the bass sound your B signal is to have If you move the Bass control to
10. TPUTS Console Master or Sub Group INSERT RETURNS 2 Another popular stereo application is the processing of existing master tapes during post production such as when reprocessing archive material for CD release If a single ended noise reduction system is used to clean up the original the STEREO VITALIZER can make a significant contribution in restoring the high end detail that invariably suffers during such treatment In many cases the restored master can be made to sound appreciably better than the original ARCHIVED RECORDING RECORDER OUTPUTS L R INPUTS Lek VITALIZER OUTPUTS INPUTS L R OUTPUTS L R VITALIZER INPUTS SINGLE ENDED NOISE REDUCTION stereo Vitalizer In the field of electronic music the STEREO VITALIZER can be used to add new range and depth to samplers and synthesizers and also to further process existing effects such as delay and reverberation Even budget instruments and processors with limited audio bandwidths can be made sound full bodied and detailed If you want to use a compressor in the master chain after the console use your STEREO VITALIZER after the compressor You can then be sure that the STEREO VITALIZER will receive a level corrected signal which helps him to even operate more precise If you use the STEREO VITALIZER before the compressor negative side effects such as pumping even could be emphasized Multi Track Recorder INPUTS L R VITALIZER OUTPUTS
11. VA Owners Manual Vitalizer STEREO El El Models 9319 9320 L SOUND PERFORMANCE LABORATORY SOUND PERFORMANCE LABORATORY STEREO VITALIZER Owner s Manual by Paul VVhite and Hermann Gier Version 2 2 95 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 vvithout notice This document is the property of SPL and may not be copied or reproduced in any manner in part or full vvithout the authorization of SPL Limitations of Liability In no event vvill 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 Vitalizer hovvever caused and on any theory of liability This limitation vvill apply even if SPL or authorized dealer has been advised of the possibility of such damage 1995 SPL electronics GmbH All Rights reserved 1993 STEREO VITAUZER and the STEREO VITALIZER Signet are registered trademarks of SPL electronics GmbH SPL electronics GmbH P O Box 12 27 D 41368 Niederkr chten Germany Tel 0 21 63 98 34 0 Fax 0 21 63 98 34 20 EMail info spl electronics com www spl electronics com Forvvord 3 Introduction 4 Operation safety 4 Connections 5 Applications Studio 6 Tape duplication 7 Broadcast 7 Sound rein
12. cs with the aid of a generator which mainly added type K3 and type K5 distortions to the signal odd harmonics of 3rd and 5th order The familiar disadvantages of this principle are as follows although odd harmonics do add to the brilli ance of the audio signal to a significant degree they tend to be somewhat sharp which leeds to hearing fatigue for listeners Another pitfall is that the distortions added were not part of the original signal The STEREO VITALIZER accentuates the harmonics which are also part of the original signal The HARMONICS filters are designed in such a way that even and odd harmonics K2 K3 K4 K5 are accentuated equally This makes the processed signal more natural with a soft silky sounding top end Once you have selected the setting for the HARMONICS control you can sit back to listen to the new sound image 7 Finally activate the SURROUND PROCESSOR tum up the STEREO WIDTH control to the 12h position and note the soft spreading stereo image 8 Switch VITALIZER ACTIVE off to retum to the original signal If you now say xl don t believe that or Booh you belong to the overwhelming majority of those people who have ever heard a VITALIZER It was this sound impression which led to VITALIZER technology winning awards like the Golden Ear from Europe s biggest Audio magazine for the most inno vative product in 1993 stereo Vitalizer The control elements of the viewer FO er Me
13. d post production work Used on complete mixes the STEREO VITALIZER will perform the same task as those esoteric and costly equalizers often used for audio sweetening but with far greater tonal flexibility and at a much lower cost The STEREO VITALIZER may also be teamed up with a single ended noise reduction system to provide the ultimate low cost post production clean up system for treating old masters which are often tonally dull as well as noisy You will be amazed by how transparent and powerful almost every audio signal sounds after it has been processed with the STEREO VITALIZER The housing of the STEREO VITALIZER has the standard 19 EIA format and occupies 1 unit 1 U 44 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 STEREO VITALIZER should not be installed near units which produce strong magnetic fields or extreme heat Do not install the STEREO VITALIZER directly above or below power amplifiers or digital processors If possible the STEREO VITALIZER should be placed in an analog rack where the majority of or all the equipment installed is analog This eliminates problems which could result from interfering high frequency signals such as clock frequencies MIDI or SMPTE control signals Check that the voltage details quoted on the back panel are the same as your local mains electricity supply Model 9320 only Use a minus screwdriver
14. forcement 8 Video amp film post production 8 First steps 9 The control elements of the STEREO VITALIZER 11 VITALIZER ACTIVE 11 PEAR 11 Bass 11 MiD Hi TUNE 12 PROCESS 13 HARMONICS 14 SURROUND PROCESSOR IN 15 STEREO WIDTH 15 Power supply 15 Specifications 16 VVarranty 17 Dear customer Thank you for the confidence you have shown towards SPL electronics GmbH by purchasing the SPL STEREO VITALIZER one of the most powerful and creative signal processors currently available The STEREO VITALIZER is a first rate sound processor with exemplary performance excellent work manship and unrivalled sound quality Please study this owner s manual carefully so that you can make the most of the wide range of possible applications offered by the STEREO VITALIZER and to ensure ease of operation We have tried to write this manual in such a way that it is easy to under stand with as clear a layout as the complexity of such a sophisticated product allows The manual is divided into two columns throughout The main column contains a detailed description whilst the margin contains headings and summarized information We wish you every success and unlimited enjoyment with your new STEREO VITALIZER SOUND PERFORMANCE LABORATORY SPL electronics GmbH stereo Vitalizer Contents Foreword Introduction DAS GOLDENE Audio OHR 93 In 1993 the Golden Ear Award was presented to SPL by Europe s biggest HiFi magazine Audio
15. hange in the sound at this stage STEREO WIDTH 2 Slowly move the Process control in from the extreme left You will find that there is no audible change in the sound until the MIN position ca 11 o clock That is just how it should be All frequencies from 3 5 kHz SURROUND PROCESSOR initial setting MiD Hi TUNE are only raised with increasing intensity above this point First set the PROCESS control at 3 o clock The bass range is not yet Vitalizer influenced at this point PROCESS 3 The next step is to shift the BASS control from the zero position to both sides VVatch out for the differing bass sounds nuances Turn to the right The bass sounds tight and dry Turn to the left The bass sounds soft and round You should perform these hearing tests on appropriate full range a z El 7 lt T monitors because near field monitors normally cannot reproduce the deep bass generated by the STEREO VITALIZER in its entirety Decide on a bass sound of the desired amplitude MID HI TUNE A Now start varying Mib Hi Tune The original setting is 3 5 kHz Tum to the right The programme material sounds brighter and gets more mids from about 1 5 kHz The impression you hear is the reverse of the poten tiometer scaling the lower the frequency the brighter and clearer sounds the programme material This is because the MiD Hi TUNE control sets a SOFT lt 0 gt TIGHT PSYCHO ACOUSTIC EQUALIZER sta
16. ocessing ratio between the set bass sound colour and the original signal This results in varying bass sound structures if you combine high bass amplification on the BASS control with a lower PROCESS value you get a different bass structure than with a lower bass amplification combined with a higher Process value Choosing the best solution is a matter of personal taste and also depends on the type of original signal involved AUDIO PRECISION SPL PHAS PHASE deg 8 AMPL dBu vs FREQ Hz Zi SEP 94 14 26 53 AUDIO PRECISION 360 089 poe The MiD Hi TUNE control is used to set the starting frequency of the broad band shelving filter In line with the setting of PROCESS control all frequencies above this value right through to the end of the audio range are processed The control range of the MiD Hi TUNE control is between 1 kHz extreme right and 20 kHz extreme left In practice common settings vary between 3 5 kHz and 8 kHz As the human ear perceives the range between 1 kHz and 3 kHz parti cularly clearly at all volumes between O and 120 phon it makes sense to adapt this frequency range You might feel indined to say Yes but 1 do that with my graphic EQ as well The main difference is that the graphic EQ really reduces the effective loudness of the frequency i e cuts out the stereo Vitalizer appropriate frequencies thus changing the spectral content of the original signal The STEREO VITALIZER hovvever
17. ou specific legal rights and you may also have other rights which vary from state to state country to country SPL electronics GmbH 41372 Niederkriichten Germany stereo Vitalizer Warranty 17
18. recordings sound fresh and silky again The brilliance of any audio signal can be improved without it sounding sharp The HARMONICS filter derives its input signal from the original signal and the output of the MiD Hi TUNE filter If you close the PROCESS control extreme left the Bass and Mip Hi TUNE controls do not function any more You can then listen to the HARMONICS control separately The second potentiometer level of the MiD Hi TUNE control is responsible for the cut off frequency of the HARMONICS filter A variation of the MiD Hi TUNE control alters the cut off frequency fundamental tone of the harmo nics Both filters complement each other in an ideal fashion as they each always process the part of the audio signal which is not being processed by the other filter If the MiD Hi TUNE control is set at 20 kHz the HARMONICS stereo Vitalizer filter intervenes at low frequencies If the MiD Hi TUNE filter is at 1 kHz the HARMONICS filter affects higher frequencies The characteristics of the tvvo filters therefore complement each other in an ideal fashion The IN switch switches the SURROUND PROCESSOR on or off The status LED 2 SURROUND indicates that the SURROUND PROCESSOR is activ The IN switch works only PROCESSOR IN when the VITALIZER ACTIVE switch is activated In case you want to monitor the SURROUND PROCESSOR in isolation switch VITALIZER ACTIVE on and set the PROCESS and HARMONICS control fully counter
19. rting frequency above which all frequencies are processed If this star ting frequency is lowered the frequency spectrum included in processing increases The programme material then sounds brighter and clearer Turning the control to the left shifts the starting frequency from 3 5 kHz to higher frequencies The programme material then sounds increasingly dull because fewer and fewer frequencies are being included in the process the higher the frequencies become The setting you choose is a matter of personal taste stereo Vitalizer First steps 10 5 A section within the STEREO VITALIZER with one of the most decisive influences on the sound is PROCESS control If you continue to turn the PROCESS control up more of the signal is added to the Bass and MiD Hi TUNE sections whilst dominant mid frequencies are reduced according human hearing at the same time The below sections contain more detailed infor mation on this aspect Familiarize yourself with the sound changes before deciding on the setting which sounds best 6 We shall now tum our attention to the HARMONICS control Note the improved detail in the high frequency range the further you tum the control in In practice values between 4 and 6 have proved to be the most common The HARMONICS are accentuated by the STEREO VITALIZER with equalizer technology unlike other procedures Previously so called Exciters devices to generate harmonic tones produced their harmoni
20. serted into the Master Inserts of the console Application 2 The STEREO VITALIZER inserted between Noise Reduction and Recorder to improve archived recordings 1 The most obvious application of the STEREO VITALIZER is to process a final mix either while mixing or during post production prior to cutting Insert your STEREO VITALIZER into the master inserts of your console or right in between a playback and a recording unit It is important to use full range monitors to assess the effect of any bass processing in and out of circuit in order to appreciate just how much processing has been added the brain soon acdimates to changes in timbre and it is easy to overdo it If in doubt refer frequently to known recordings played through the same monitor system Do not connect the STEREO VITALIZER between master outputs and amplifier The major disadvantage of this connection is the varying input sensitivity with each fader movement When patching the STEREO VITALIZER into the sub groups or master breaks of the console note if the master breaks are switched pre or post fader They should best be switched pre fader so that a variation of the master fader does not affect the input level of the STEREO VITALIZER The effect level and the treated sound will then remain unchanged INPUTS L R eeeee Master OUTPUTS L R Master or Sub Group VITALIZER INPUTS INSERT SENDS os VA arer VITALIZER OU
21. table stereo music systems stereo Vitalizer Application 3 The STEREO VITALIZER inserted between Compressor und Recorder Tape Duplication Broadcast Sound Reinforcement Video amp Film Post Production In live performance or in club installations the STEREO VITALIZER is a powerful ally in maintaining speech intelligibility under difficult conditions It is also of great benefit in systems designed to play recorded music because the illusion of loudness can be maintained at lower absolute SPLs This could be particularly beneficial with the introduction of new noise level legislation On the subjective side the STEREO VITALIZER helps produce a detailed tight sound even from indifferent speaker systems giving an improvement in perceived audio quality The STEREO VITALIZER can be of great value when mixing under time pres sure You can almost leave the onboard EQs flat and create the FOH sound with the STEREO VITALIZER in the master inserts As in other areas the STEREO VITALIZER can be used to sharpen and enri chen dialogue even when the microphone placement is less than optimum as is often the case when filming due to the need to keep the mic out of shot Music soundtracks benefit in the ways already described for audio only applications and the fact that the STEREO VITALIZER is so quick to set up can save a lot of wasted time spent tuning multi band equalizers Time compressed audio can also be treated
22. the right you get a drier percussive bass sound known as TIGHT As a result of this on the right hand side of the scaling points there are squares which increase in size in line with increased intensity They symbolize the contoured TIGHT bass sound If the Bass control is moved from the centre position 0 to the left the bass sound becomes very deep soft and warm This sound is known as Sort This is symbolized with round scaling points which also increase in size as the intensity increases The further the Bass control is shifted to the right or left of the centre position the more intensive the bass sound in question However PROCESS must be positioned to the right of the MIN setting for the bass to be audible You can always hear the original dry bass if the BASS control is in a centre position sterro Vitalizer L 11 Control elements 12 Fig 1 The dotted line shows frequency responses fora soft Bass SOFT at maximumPROCESS and a MID HI Tune of 3 5 kHz The solid line shows the phase response which always drifts only a few degrees if the amplitude is increased Fig 2 The dotted line shows frequency responses for a hard Bass TIGHT at maximum PROCESS and a MID HI Tune of 3 5 kHz The solid line shows the phase response whichhas a phase relation of 180 at 50 Hz but otherwise also drifts only by a few degrees at increasing amplitudes EI The PROCESS control determines the pr
23. thorized 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 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 consequential or incidental damages Some states or countries do not allow the limitations or exclusion of incidental or consequential damages so the above limitation may not apply to you Any and all warranties express 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 particular are limited to a period of 1 one year from either the date of manufacture Some states or coun tries do not allow limitations on how long an implied warranty lasts so the above limitations may not apply to you This limited warranty gives y
24. to restore the lack of timbre so often caused by such intensive processing This is particularly valid in the case of vocal narratives as even a relatively small amount of time compression or expansion can dramatically compromise the sound quality On the post production work on Spike Lee s Malcom X movie the voice of Denzel Washington playing Malcolm X was treated with the VITALIZER for dramatical reasons We wanted to make sure that there was a dramatic quality difference between the voice over and the sync dialog Fleischman adds offering a mixer s view You try to find a balance between two center mics then balance that with whatever you re using from left right pair We then treated it with the SPL VITALIZER a psychoacoustic equalizer It brings a lot more presence to the upper end of the spectrum and a very deep low end so that the voice sounds full Mix Magazine December 1992 stereo Vitalizer VVhen setting up the STEREO VITALIZER for the first time it is vvise to First steps approach the controls in a specific order to avoid confusion and to achieve positive results right from the start Use a CD as source Set up positions Bass to zero center position HARMONICS to Min counter clockwise MiD Hi TUNE to 3 5 kHz center position Process to MIN counter clockwise STEREO EXPANDER to min counter clockwise SOUND PERFORMANCE LABORATORY 1 Press the ACTIVE switch There is no audible c
25. ure results in a silky top end with far better separation and intelligibility STEREO VITALIZER alters the frequency spectrum in sudh a way that the balance is maintained between all frequency ranges even at varying monitor volumes For the human ear the sound is more pleasant and easier to perceive than the original In other words increasing the PROCESS value also increases the intensity of the MiD Hi Tune filter and the Bass filter whilst dominant mid frequencies are damped by amplitude controlled phase shiftings This improves the perception of loudness clarity and the bass punch i e the strength and fullness of the audio signal 3 us FREQCHz 12 DEC 94 11 36 29 20 190 1k 10k 20k The STEREO VITALIZER works with steep filters and controlled changes of the phase relationships of the harmonics to process the harmonics struc ture We consciously did without the generator principle of Exciters The STEREO VITALIZER s harmonic filter does not add any distortions to the original signal unlike with the generator principle It extracts all the infor mation it needs from the original signal This significantly reduces the hearing fatigue effect on the listener By influencing the phase relationship in an intelligent fashion the harmonics which have been filtered out are emphasized with increasing addition expressed as a percentage The effect significantly improves the speech intelligibility and the transparency Old archived
26. use has a value of 200mA On the secondary side of the power supply an RC combination is used to filter out noise and hum voltages from the mains side Both half waves are smoothed with 2200 uF capacitors in the positive and negative voltage path Both pathes are calibrated separately via trimmers as deviations of only a few millivolts can result in audible changes such as a diffuse sound pattern After the calibration stage the current is again smoothed stereo Vitalizer L 15 Specifications 16 vai Hoe mL OC 6 12PON Li ar PCE a a a a Ta A OISJ9D cu e 3 El 1194110 A 6LE6 IPPON OISJ9 u STEREO VITALIZER Rear Panel Version 1 Model 9319 unbalanced jack version until autumn 1995 unbalanced input amp output stages 0 dB mono 1 4inch jacks 2 wire power cord relais hard bypass Version 2 Model 9320 unbal jacks amp bal XLR Version balanced 6 dB amp unbalanced O dB input 8 output stages NC3 XLR connectors and mono 1 4inch jacks voltage selector 220 240 V 50 Hz or 100 120 V 60Hz detachable 3 wire U ground power cord GND Lift switch relais hard bypass Specifications Frequency bandwidth 10 Hz 100 kHz 100 kHz 3dB Equalizer frequency range 15 Hz 22 kHz CMRR common mode rejection 85dBu at 100 Hz 76dBu at 1 kHz 65dBu at 15 kHz THD amp N total harmonic distortion amp noise 0 002 at 1 kHz 0 105 at 10kHz
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