Sound Performance Lab PQ Mastering Equalizer Musical Instrument User Manual
Contents
1. Note The motorized potentiometers may automatically move to adapt to the stored parameters NEVER manually move or hold the potentiometers while recalling a preset Channel Control Elements Connectors CONNECTORS rear panel Audio inputs and outputs are provided as balanced XLR connectors Connect the included external power supply to the multi pin socket in the upper left corner ensuring that the connection is secure The Multi Channel Link 1 2 connectors are used to interconnect up to four PQ s which are then remote controlled via an optional master remote unit still in devel opment The latter is connected to the Remote connector of the first slave PQ Please note To ensure secure connections stable operation and optimal audio quality always use professional grade cables and connectors Technical Specifications Input impedance balanced Welwyn precision resistors transformerless Output impedance balanced CMR trimmers transformerless Overload resistance Band 1 5 ON B C o Harmonic distortion S N Band 1 5 ON B C o each Q Q1 Band 1 10 Hz Band 2 100 Hz Band 3 1 kHz Band 4 10 kHz Band 5 28 kHz Transmission bandwidth 3 dB Band 1 5 ON B C o Processed frequency range Phase CMRR Max Gain 34 dBu Band 1 5 ON B C 0 Housing amp mounting dimensions Weight ES 20 kOhm lt 600 Ohm 34 dB 30 dBu 0 2 20 d2. The PQ is a fully parametric dual channel 5 band equalizer As with all SPL High Gain units the PQ has an operating voltage of 124 V and is constructed with the best analog components available Power for sound SPL SUPRA components The central component of the PQ is a fundamentally new amplification design discrete custom made Class A audio operational amplifiers which run on a 120V operating voltage 60 V This amounts to over three times the operating voltage found in most high quality audio gear 15 20 V and about twice as much as the highest voltages used in the best units currently available This extremely high voltage allows the circuitry to process an astonishing dynamic range of ca 150 dB and an amazing 34 dB of headroom virtually eliminating overloading of individual filter stages even when processing extremely high level signals For the first time transistor circuits with such an impressive degree of stability and freedom from harmonic distortion can be realized After the revival of tube units in the early gos we feel that the time may be ripe for a revival of the transistor sound in the near future Technology Additional construction features All crucial resistors in the I O and filter circuits are subject to ultra tight tolerances of 0 001 to ensure clean and accurate amplifier stage performance All circuit board tracks are double width 1 mm and double thickness 70 micrometers guarant
3. PQ Mastering Equalizer LF MF 10 Hz 235 Hz Sr 330 Hz 7 1 kHz PQ High Gain Parametric Equalizer Mastering Edition Owner s Manual PQ Mastering Equalizer Model 2050 Owner s Manual Analog dual channel five band parametric equalizer Owner s Manual V 1 4 9 2003 Software version 240H R amp D Wolfgang Neumann The information in this document has been carefully verified and is assumed to be correct However Sound Performance Lab 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 limita tion will apply even if SPL or an authorized dealer has been adviced of the possibility of such damage Sound Performance Lab SPL electronics GmbH P O Box 12 27 D 41368 Niederkruechten Germany Phone 49 2163 983 40 Fax 49 2163 983 420 2003 SPL electronics GmbH AUREA All rights reserved Technical specifications and appearance are subject to change www soundperformancelab org without notice Introduction 3 Installation 4 Technology
4. s keys go dark showing that it is being controlled by the left channel and its keys have no function To select the right channel as master press and hold the Link key for two seconds The Link On and Ond keys blink rapidly indicating that an entry is expected Pressing the On key at this time selects the right channel as master Similarly pressing the duin key selects the left channel Once a channel is selected the keys stop blinking the Link key illuminates and the slave channel s keys go dark The duin and Ona keys also allow you to bypass or reactivate the channels for monitoring purposes Releasing individual filter bands from channel link mode In some cases it may be desirable to not link all filter bands for example when processing individual stereo signals such as a wide stereo guitar signal In such cases you may need to make separate adjustments of particular frequencies on each channel necessitating the release of individual filter bands from link mode To release a filter band simply press and hold the respective filter band key on the Slave channel for approximately one second until the key illuminates The filter band is now active and can be independently adjusted To return the band to link mode press the key again for approximately one second until it goes dark The band will automatically assume the settings from the respective band in the master channel any individual adjustments will be lo
5. 5 Key Functions 6 Channel Control Elements 8 Technical Specifications 10 Warranty 11 Dear customer thanks for using the PQ Mastering Equalizer We wish you have as much fun working with it as we had during the development of this extraordinary equalizer Supplied parts e PQ Mastering Equalizer e External power supply transformator including both power cords e Owner s Manual Content Introduction Key features e Pure analog discrete Class A equalization circuitry e Digital storability and total recall with motorized controls and 800 presets e Constant Q and proportional Q modes selectable per filter band e 124V internal operating voltage for clean consistent audio e Discrete SPL SUPRA op amps with 150dB dynamic range e Channel link mode for stereo applications e Master slave unit link mode for surround applications or subgroup processing allows remote control of up to four PQs via optional remote unit still in development e As with all SPL products the PQ is conceived designed and hand built in Germany Installation BEFORE SWITCHING ON POWER SUPPLY AND PQ THE PQ MUST BE CONNECTED TO THE POWER SUPPLY WITH THE SUPPLIED MULTICORE LEAD PAY ATTENTION TOA SECURE CONNECTION The PQ and the external power supply should be situated away from heat sources and direct sunlight PQ and power supply need sufficient air circulation Avoid instal lation in environments exposed to vibrations dust heat cold moisture
6. or electrical and magnetic fields Do not install the unit in proximity to power amplifiers or digital processors You may consider placing it in a rack containing other analog gear Such placement can prevent interference from Word Clock Smpte MIDI etc e Do not open the case You may risk electric shock and may damage your equip ment e Leave repairs and maintenance to a qualified service technician Should foreign objects fall inside the case contact your authorized dealer or support person e To avoid electric shock or fire hazards do not expose your unit to rain or damp ness e Incase of lightning unplug the power supply Please unplug the cable by pulling on the plug only never pull on the cable e Never force a switch or knob e To clean the case use a lint free cloth Avoid cleaning agents as they may damage the chassis e Please support the back of the unit whenever it is being mounted into a 19 inch rack especially important when touring Setting the appropriate supply voltage The appropriate supply voltage 115 V 230V must be set on the rear panel of the external power supply The fuse block left from the power cord socket can be inserted in two positions to meet your country s power requirements Refer to the marks on the fuse block triangles for both voltages and insert the block with the appropriate triangle pointing to the white line on the fuse block case The power supply is fitted with 3 5 A fuse
7. Bu 0 05 o dBu 0 01 10dBu 0 002 30 dBu 0 0005 90 dBu A weighted 88 dBu w o Filter 10 Hz 100 kHz 10 Hz 28 kHz 10 Hz 5 5 1 kHz g 10 kHz 1 23 100 kHz 8 8 200 kHz 11 25 gt 75 dB 1 kHz Standard EIA 19 inch rack chassis 4 units 482x176x390 mm W XHxD ca 189 3 4 x 69 3 10 x 153 1 2 inchWxHxD 18 25 kg 40 15 lbs External power supply The PQ comes with an external linear power supply featuring a toroidal transformer for optimal audio quality and dramatically reduced inductive disturbance interference Input voltage 110 120 V 60 Hz or 220 240V 50Hz Noise gt 100 dBu 60 V Dimensions Width 15 cm 5 9 10 inch Depth 24 5 cm 24 1 2 inch Height 7 cm 2 3 4 inch Weight 4 2 kg 9 24 lbs 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 instructions or 3 in products repaired or serviced by other than authorized SPL r
8. dth in constant Q mode enables tight selective control in precision applications Illuminated keys The PQ features illuminated keys that illuminate brightly when activated The final software version will provide dimly lit keys 25 brightness when deactivated for ease and security of operation The current software version 240H switches illumi nation off when keys are deactivated LF LMF MF HMF and HF keys These keys activate key lamps lit or deactivate lamps off the 10 filter bands Con Q key This key switches the 10 filter bands between proportional Q mode lamps off and constant Q mode lamps off Please note It is impossible to activate the GN for a specific band and the Con Q button simultaneously Please always press one of these buttons after another Channel Control Elements LINK FUNCTION The link function couples the two channels for stereo applications In link mode one channel s controls will control both channels simultaneously Note The link function is not available in slave mode unit link If slave mode is acti vated the link key is disabled and the Link LED is dark Master and slave channel In the default state the left channel acts as master in link mode When the Link key is depressed LED fully lit the Gun key blinks rapidly for about one second and then stays lit to indicate that the link function is activated with the left channel as master In addition the right channel
9. ear from either the date of manufacture 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 41372 Niederkruechten Germany All you need is imagination good ears and three letters
10. eeing stable high gain operation with minimum resistivity A separate grounding track is placed between signal track pairs virtually eliminating crosstalk for maximum signal separation The individually switchable filter bands are self contained on separate circuit boards Contrary to most conventional equalizers the bands are not summed via a central stage so that the signal passes only through those filter stages which are activated Key Functions Constant Q and proportional Q modes Each frequency band consists essentially of two fully parametric equalizers one for constant Q mode and one for proportional or variable Q mode selectable per band The PQ is the first equalizer to offer both modes endowing it with double equaliza tion power for demanding corrective and creative applications In constant Q mode the selected bandwidth remains unaffected by the amplitude setting making it the best choice for corrective applications e g to eliminate unwanted frequencies In proportional Q mode the amplitude is reduced as the bandwidth is raised and vice versa With the smallest bandwidth setting the maximum amplitude reaches 11 5 dB while it is reduced to 2 5dB with the broadest bandwidth setting The Proportional Q mode is better suited for creative sound shaping applications as a bandwidth related amplitude allows for sensible musically suggestive operation with raising bandwidths higher amplitudes are increasingly l
11. entiometers is evenly dispersed throughout the 300 degree movement area ensuring smooth and continuous adjustments and extreme operational security The high resolution of each respective value e g Q from 0 1 3 7 evenly distributed over 300 degrees allows extremely precise adjustments as well as accurate repeat ability We intentionally avoided unnecessary or confusing functions such as frequency range switching or frequency bandwidth or amplitude multiplicators Important note The motorized potentiometers should NEVER be manually moved or held while being controlled by the motors e g in channel or unit link mode Amplitude Amplitude settings are freely adjustable from 11 5 to 11 5 dB The lower range between o and 2 5 dB offers extremely high resolution allowing delicate adjust ments with maximum precision Frequency Each channel provides five fully parametric frequency bands covering 10 Hz to 28 kHz Each band overlaps its neighbor by one octave and can be independently acti vated and deactivated The following frequency bands are provided LF Low Frequencies LMF Low Mid Frequencies MF Mid Frequencies HMF High Mid Frequencies HF High Frequencies 10 Hz 235 Hz 35 Hz 720Hz 330 Hz 7 1 kHz 670 Hz 16 kHz 1 2 kHz 28 kHz Key Functions Bandwidth Bandwidth is adjustable between 0 1 and 3 7 Qin proportional Q mode and between 0 9 and 15 Qin constant Q mode The extremely high maximum bandwi
12. epair facilities or 4 in products with removed or defaced serial numbers or 5 in components or parts or products expressly warranted by another manufacturer SPLagrees 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 original packaging or a replacement supplied by SPL with all transportation costs and full insurance paid each way by the purchaser or owner Warranty 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 y
13. ess useful Controls All variable controls are motorized and all keys are digitally controlled to provide the same programmability and repeatability of digital units Individual settings can be stored in up to 800 presets Link mode Channel 1 and 2 can be linked for coherent stereo operation and either channel can be designated as master In link mode coupled bands can be activated deactivated simultaneously while single bands may also be released from link mode if required for individual adjustment Master Slave unit link mode The PQ offers a Master Slave mode for surround applications or subgroup processing in which the settings on the master unit are precisely duplicated on the slave units Thus the PQ is the first EQ system that provides up to eight channels for coherent analog equalization of surround recordings Remote Control Unit SPL offers a remote control unit with an identical user interface to the PQ which will be able to control up to four units individually or in common Display A central display clearly indicates all information relating to preset storage and control functions The control logic is clear and intuitive without menu layers guar anteeing quick and easy operation and a minimal learning curve Motorized potentiometers All of the PQ s potentiometers are motorized to accommodate the channel link and unit link functions The adjustment range of the Frequency Bandwidth and Amplitude pot
14. s slow blow Power up sequence It takes about four seconds until the power up sequence is completed During this procedure all potentiometers will move to the center 12 o clock position and a test routine checks all 32 relays you will notice 32 clearly audible relay clicks while the display indicates SE7P setup After finishing the power up sequence the display shows GOOO and the unit is ready to operate Ground Lift switch A switch labelled GND LIFT is placed on the rear panel of the power supply It serves to eliminate hum problems This switch physically separates chassis ground from AC ground GND LIFT is activated chassis ground separated when the switch points downwards SPL High Gain Technology SPLis constantly pushing analog signal processing to its limits by combining the best possible components with perfectly optimized circuit design As our latest achieve ment in this ongoing process SPL s High Gain Series surpasses the hitherto accepted limits of audio signal processing and combines truly unparalleled analog sound quality with the control and convenience of digital units The first High Gain Series product the parametric equalizer PQ was introduced at the AES Convention 2001 in Amsterdam and will be available in summer 2002 Further High Gain projects are in planning including a microphone preamplifier and a compressor although no availability projections can be made for these currently
15. st SLAVE FUNCTION The slave function allows up to four PQs to be remote controlled by an optional remote unit still in development with an identical user interface In order to activate the slave function a Sub D cable must be connected to the appropriate connector on the rear panel Multi Channel Link 1 amp 2 REMOTE and recognized by the operating software MEMORY The PQ provides 800 memory locations presets The presets are displayed as EOUDD POD Presets are selected via the Up Down keys e Pressing the Up or Down key once steps through the presets in the respective direction e Holding the Up or Down key steps through the presets quickly in steps of ten When a preset is selected the display indicates whether it is stored contains data or is empty If an empty preset is selected the letter A in the display blinks if a stored preset is selected the letter A does not blink e Preset GOO is empty display shows A001 A blinks e Preset A002 contains data display shows AGOZ A does not blink The currently active preset remains active until a newly selected preset is recalled Recall key or stored Save key Storing your settings in an empty preset 1 Select an empty preset e g ADG 4 blinks 2 Press the Save key The display shows SAVE for approximately one second 3 The preset is now stored The display shows A002 4 no longer blinks Over
16. writing a written preset 1 Select a written preset you wish to overwrite e g 4403 A does not blink 2 Press the Save key The display shows OKER prompting you to confirm overwrite 3 Press the Save key again The display shows SAVE for approximately one second 4 The preset is now stored The display shows A003 A does not blink Overwriting the current preset In order to facilitate ease of operation there is no prompt for confirmation when overwriting the currently active preset We suggest that you select either an empty preset or one you wish to overwrite before beginning with complex adjustments Alternatively you may store your settings in a new preset at an early stage and continue adjustments in that preset storing as you go As long as you Store in the same working preset the prompt will be skipped and the store command will be executed immediately Recalling a preset 1 Select the desired preset e g A202 Up Down buttons The display shows 202 A does not blink 2 Press the Recall key The display shows REL 3 While switching from one preset to another the PQ switches to a bypass mode During this procedure only the bypassed PQ input signal is audible Depending on the recalled preset switches and controls change status accordingly and the preset display changes to the chosen number A202 A does not blink when the recall procedure is finished
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