Sound Performance Lab PQ Recording Equalizer Musical Instrument User Manual
Contents
1. 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 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 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 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 impl2. PQ Recording Equalizer LF MF 10 Hz 235 Hz edi 330 Hz 7 1 kHz spl ka J PQ High Gain Parametric Equalizer Mastering Edition Owner s Manual PQ Recording Equalizer Model 2377 Owner s Manual Owner s Manual V 1 0 5 2004 Software version 016 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 Email info soundperformancelab com www soundperformancelab com 2003 SPL electronics GmbH All rights reserved Technical specifications and appearance are subject to change without notice Content dauzala aA 3 Installation aireratzea eae kar
3. 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 Functions and Operation 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 less useful Con Q Keys These keys switch in the constant Q mode illumination on for each filter band In proportional Q mode illumination is off PLEASE NOTE It
4. 24 lbs Input impedance balanced Welwyn precision resistors transformerless Output impedance balanced CMR trimmers transformerless Overload resistance Band 1 5 ON Bf o Harmonic distortion S N Band 1 5 ON B C 0 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 20 kOhm 600 Ohm 34 dB 30dBu 0 2 20dBu 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 50 1 kHz 0 10 kHz 1 23 100 kHz 8 8 200 kHz 11 25 gt 75 dB 1 kHz Max Gain 34 dBu Band 1 5 ON B C o Housing amp mounting dimensions Weight Standard EIA 19 inch rack chassis 4 units 482x176x390 mmW XHxD ca 189 3 4 x 69 3 10 x 153 1 2 inchWxHxD 18 25 kg 40 15 lbs Specifications Warranty 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
5. is impossible to activate the ON and Con Q keys simultaneously please always press one key after another Link mode All switching functions can be linked to operate both channels from one master channel This is particularly recommendable for stereo operation Both channels can be specified as master channel Pressing the central key with the arrow in left direction activates link mode with the left channel as master pressing the key with the arrow in the right direction activates link mode with the right channel as master If the link mode is activated you can bypass the complete PQ electronics by deactivating the ON key of the master channel signals are routed from inputs to outputs because the ON key of the master channel also activates the ON key of the linked channel Deactivating the ON key of the linked channel only bypasses this channel while the master channel remains active Amplitude Amplitude settings are freely adjustable from 15 dB in proporional mode and from 20dB in constant Q mode 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 10 Hz 235 Hz LMF Low Mid Frequencies 35 Hz 720 Hz MF Mid Frequencies 330 Hz 7 1 kHz HMF High Mid Frequencies 670 Hz 16 kHz HF High Frequencies 1
6. 2 kHz 28 kHz Bandwidth Bandwidth is adjustable between 0 1 and 3 7 Q in proportional Q mode and between 0 7 and 15 Qin constant Q mode The extremely high maximum bandwidth 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 Functions and Operation Rear Panel Connections External Power Supply 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 Please note To ensure secure connections stable operation and optimal audio quality always use professional grade cables and connectors 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 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
7. 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 fuses slow blow Power up sequence It takes about four seconds until the power up sequence is completed During this procedur
8. e 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 After finishing the power up sequence 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 Together with the MMC1 multi channel mastering console the parametric equalizer PQ both as recording or mastering version was the first product of SPL s new High Gain Series Further High Gain projects are in planning including a microphone preamplifier and a compressor although no availability projections can be made for these currently 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 120V and is constructed with the best analog componen
9. e egea A Technology arrera a eerren 5 FUCTIONS ANG Operation arerrza renaren tearren 6 Rear Panel Connections External Power Supply rra 8 SpecincationS ezeztatze egarbera eerren 9 Aldra 10 Introduction 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 Recording Equalizer e External power supply transformator including both power cords e Owner s Manual Key features e Pure analog discrete Class A equalization circuitry 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 150 dB dynamic range e Channel link mode for all switching functions e g for stereo operation 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 or electrical and magnetic fields Do not install the unit in proximity to power amplifiers or digital processors You may
10. ied 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 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 TS
11. ts 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 4 mm and double thickness 70 micrometers guaranteeing stable high gain operation with minimum resistivity A separate grounding track is placed between signal track pairs virtually eliminating crosstalk for maximum signal separation
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