Sound Performance Lab 2048 User's Manual
Contents
1. 21 63 98 34 0 Fax 49 21 63 98 34 20 eMail info soundperformancelab com C www soundperformancelab com O 2000 SPL electronics GmbH All Rights Reserved Stereo O Contents INCKOGUCTION lt A ee EUR 4 Features anan Od e RE GR HERI Pe REI RR Ne VR TERR RENE REN eet 5 HOOKUP re aan m am k W O 5 Connections R arfront iWIringi uu D W AAA 6 General advices sockets L a n sais 7 Operation General Advice Proportional Q recommendations for the setting of bandwidth Q 8 POWEP RE 9 ACtiVe A a u ma u Su a R Q Q us D n m Q Q eaten 9 S ubu aaa 9 Ep aaa ana ii 10 LU rM 11 hl 11 PU a aa a UNA o e orat o mu u er ae 12 3D ENN aN CEN o A aa R 12 Power Supply areeiro dicas 13 Specifications iii AAA da 13 E A RN 14 DA LIC iia near naaa tine 15 NOTES iii EEEE EA EEVEE E ERE ARR 16 Stereo Q L 3 Introduction 4 L The Stereo Q is a parametric 5 band stereo equalizer which excels particu larly in two ways Itis the first stereo equalizer in its class The serial filter design based on the legendary QURE equalizer filter gua rantees the high tonal qualities for which SPL products have become renowned The continuously increasing number of stereo equipment such as stereo keyboards samplers or guitar amplifiers together with the broad spectrum of sundry stereo effect gear reinforces the need for utilization of stereo equalizers Furthermore the processing of stereo tracks in the c2. rack especially important when touring Stereo O Features Hookup CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR pl gt iring lt S e GND e ee s pjo Bury 304 dit PIO 300 GND L p10 304 Z GND L 10 23UU0D Jef Od19 s BUINIM Uld 3ndino y1X Bun uld 3ndui y1X BuuA Uld juawidinba Kup jo SJAISUI AO SUANJAA O2349 S sindui ajosuo 4 ef 10 Y1X sindino bayer EH 7H09 A0z1 001 SUN Se Es m ZHOS AO Z 0ZZ El D 39NINIM VE HB russ iE Hes mM YIJANO SVd IN 3101312313 DOHI 3d INOS SIAV ed aa m NV MEA IVA N c Q9 ouo x Z 10 v sjoubis 9 091935 V lt c O v pef 10 47X sinduj Stereo O 6 sal General Advice Again while Stereo Q s housing is EMV proof and protects against HF inter ference placement of the unit is very important Please read hookup instruc tions first page 4 Before connecting the the unit or any other equipment turn off all power Adjust the voltage setting on the back so that it corresponds with the power conditions Input balanced unbalanced wu Tip Tip Ring Ring GND Sleeve GND Sleeve GND Balanced Unbalanced Sockets 1 GND 2 hot 3 cold Output balanced unbalanced ik The diagrams show the correct polarity for balanced XLR o
3. electronically balanced differential transformerless Nominalinputlevel Input impedance Output impedance Max inputlevel Max outputlevel Minimum load ohms Relay Hard Bypass Power Fail Safety Power Supply Ground Lift switch Voltage selector Dimensions AAA uq na tendens Note 0dBu 0 775 V Subject to change without notice Stereo 22 kOhms lt 600 Ohms 20 dBu 20 dBu 600 Ohms 15VA 315 mA slow blow Standard EIA 19 1U 482 x 44 x 237 mm 3 4 kg 13 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 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 fac
4. Mid filter leaving the Low filter free for other instruments The maximum cut and boost Cut Boost control of the selected frequency is 15 dB The Q factor can be varied from 0 5 to 5Q with the Bandwidth control A lower Q factor relates to a larger bandwidth at the selected frequency whereas a larger Q factor defines a smaller bandwidth Please read the information about proportional Q principle of the filter and the recommendation of setting of bandwidth on page 8 CUT BOOST BANDWIDTH FREQUENCY de lt 5303705 Y 104 21 E 3 5 09 13 17 i y as AA n n 07 25 B B o i 1 e pea E as a af A HIGH He High The High filter spans the frequency range from 940Hz to 24kHz Frequency control The High filter is utilized in the first place for narrow band corrections whether to eliminate interference frequencies e g pilot reference or to accentuate certain frequencies The combination of High and Air band offers excellent possibilities for the processing of the high frequencies thereby permitting the High filter for example to be used for precise adjustments while the Air filter is providing a silky top end The maximum boost or cut Cut Boost control of the selected frequency is 15 dB The Q factor can be varied from 0 5 to 5Q with the Bandwidth control A lower Q factor relates to a larger bandwidth at the selected frequency whereas a larger Q factor defines a smaller bandwidth Please read the
5. produce a beautiful bass layer with the Sub Bass filter into which frequency selected accents using the Low filter a can be interspersed Instruments provided with such processing give a y powerful bass foundation with clear definition impure bass equalization is eradicated CUT BOOST BANDWIDTH FREQUENCY de E x Low The Low filter spans the frequency range of 10 to 250Hz Frequency control It can be described as a decisive low band filter that in distinction to many comparable concepts deals exclusively with the low tonal range and in this manner can be utilized very accurately and with high sensitivity The maximal amplification or reduction Cut Boost control of the selected frequency is 15 dB The Q factor can be varied from 0 5 to 5Q with the Bandwidth control A lower Q factor determines a larger bandwidth at the selected frequency whereas a greater Q factor defines a smaller bandwidth Please read the information about proportional Q principle of the filter and the recommendation of setting of bandwidth on page 8 10 L Stereo Q Mid High Operation CUT BOOST BANDWIDTH FREQUENCY de E 60 72 o 50 85 Mid The Mid filter covers a frequency range of 140 Hz to 3 5 kHz Frequency control The frequency range of the Mid filter reaching down to 140 Hz offers a problem free access to sounds in this range This means that a snare which operates often around 160 Hz can be processed with the
6. signal components that are placed left and right in the stereoscopic image and mixes them inverted to the respective opposite side In this way a decentralized location of the sound sources is simulated which magnifies the spatial impression In this process monophonic signals are weakened The adjustment range of the 3D Enhancer extends from 1 no proces sing up to 19 maximum processing In practice values between 6 and 14 have proven to give optimal performance Dependant on the condition of the original signal the mono compatibility should be monitored with a phase meter when high settings are used Stereo O Power Supply Built around a toroidal transformer the power supply allows for a minimal electromagnetic field with no hum or mechanical noise The power supply s output side is filtered by an RC circuit to extract noise and hums caused by your power service 6000uf capacitors smooth out the positive and negative half waves The supply voltage can be set to 230 V 50 Hz or 115 V 60 Hz Check your country s power requirements for the appropriate setting An AC power cord is included to feed the IEC spec 3 prong connector Transformer AC cord and IEC receptacle are VDE UL and CSA approved The main fuse is rated at 315mA Chassis ground and AC ground can be physically disconnected by the Ground Lift switch GND LIFT This helps to eliminate hums Input amp Output Specifications Instrumentation amplifier
7. 935 soundperformancelab com Manual Cur Boost cur Boost BANDMIDTH FREQUENCY CUT BOOST BAHDWIDTH FREQUENCY cur Boost BANDWIDTH FREQUENCY cur BoosT WIDTH POWER O T 10 ACTIVE 2104 aon 1194 78 gt in S O 4 4 5 09 13 3 3 6 4 08 15 L oOtlereo U Am i x gt Stereo Equalizer B og 3 7 o5 5 2 18 1 19 A nor ax moner O MID 3D ENHANCER 2048 O Stereo O Model 2048 Parametric 5 Band Stereo Equalizer Manual 2 L Stereo Q Model 2048 Version 1 0 5 2000 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 limitation will apply even if SPL or an authorized dealer has been adviced of the possibility of such damage Sound Performance Lab P O Box 12 27 D 41368 Niederkruechten Germany Phone 49
8. This is in line with human hearing sensitivity and allows efficient processing In addition further adjustment of the Cut Boost control is no longer necessary when the bandwidth is varied With other common constant Q EQs an increase of the bandwidth leads to magnification of the overall volume so that the processed band sounds unnatural and unmusical Recommendations for the setting of bandwidth Q To some degree the bandwidth shown on the unit relates in inverse proportion to the octave bandwidth displayed which is often used to describe the bandwidth The maximum adjustable Q value 5 narrowest bandwidth relates to approximately 0 2 octaves on the Stereo Q the minimum Q value 0 5 greatest bandwidth is approximately 2 octaves Bandwidth adjustment is always dependant on the program or instruments to be used It is not possible to lay down hard and fast rules but the following recommendations are provided Q values between 1 and 2 are as a general rule most suitable for proces sing of voices keyboards or acoustic instruments with inbuilt microphones High Q values between 3 and 5 are often used for processing of extremely high frequency spectrums to enable accurate correction Larger bandwidths are utilized in the high tonal range when for instance refinement of muffled material over a broad bandwidth is required Nevertheless the air band filter of the Stereo Q already produces excellent results in this respect so that the high ban
9. Three fully parametric bands in accordance with the musically effective proportional Q principle Boost Cut 15 dB Q 0 5 to 5 LOW band 10 250 Hz MID band 140 Hz 3 5 kHz HIGH band 940 Hz to 24 kHz Sub Bass EQ Cut Boost 14 dB up to 200 Hz with coil capacitor filter network that produces a penetrating and lucid deep tone spectrum The combination of Sub Bass and Low filter for the processing of the bass spectrum is very effective and opens a new dimension for sound creations Air EQ the selected coil capacitor filter network provides a silky and airy presence especially in digital recording The 3D Enhancer intensifies the spatial impression of the stereo signal without affecting the low frequency tonal components Optional provision of input and output transformers from Lundahl balan cing through transformer stages the galvanic separation ensures high operational safety Tonal advantages are offered by the transformer coil This minimizes odd harmonic distortion and provides a silky top end Generally coils sound less aggressive but produce a rounder and more powerful sound in the deep tone spectrum This means they possess advantageous musical properties which is why SPL prefers to install coils in the filter area Ground Disturbances which could have an effect over the ground runs are minimized by the separation of the audio ground from that of the remaining apparatus This leads substantially to a higher and cleaner to
10. d filter can be used to achieve even further accurate correction In the bass range larger bandwidths approx Q 0 5 to 0 8 are more frequently selected to provide even processing of the deep tonal ranges However the possibility of a combination of Sub Bass and Low filters should be considered because this permits broad band processing with the Sub Bass and precise correction on the low band Generally medium Q values approx 0 8 to 1 2 are suitable for frequency ranges from 100 Hz to 700 Hz Stereo O Power Active Sub Bass Power The power switch is used to turn the unit on or off The positive and negative paths of the power supply are separated in front of the power unit to ensure that the switched off unit is reliably separated from the mains current The lamp in the power switch is powered directly from the mains current in conformity with CE regulations enabling easier detection of faults If the power lamp is not illuminated the reason is probably a defective mains fuse If the power switch is illuminated but for instance the activated Active switch is not this points to a fault in the power unit If there is a power failure no mains power or unit switched off a hard bypass relay for each channel switches the signal directly from the inputs to the outputs thereby maintaining a signal flow under all circumstances ACTIVE Active Active switches the electronics via the hard bypass relais into th
11. e signal path The button switches a crackle free relay and offers a fast comparison between the processed and unprocessed signal To protect the entire elec tronic circuitry the Active switch should be used when the unit is deac tivated for a short period The power switch should only be used when the equipment is to be turned off for a longer period and it is worth while CUT BOOST dB Sub Bass The Sub Bass filter spans a range of 10 200 Hz Frequency control The maximum possible boost or cut is 14 dB Cut Boost control This filter is a passive network comprised of a capacitor resistor and coil The inductivity of the coil possesses advantageous acoustic properties in comparison to pure electronic filter stages The build up and decay behavior of the coil is some what tardy but in this manner rounder sounding bass tones are provided Stereo O Operation POWER Power supply in conformity with CE regulations Hard bypass relay maintains signal flow gt Operation Low Coils additionally produce a more pleasant harmonic spectrum which is especially important for the precision and tangibility of bass sounds gt The Sub Bass filter is exceptionally suitable in presenting voluminous and powerful deep bass sound and produces a fat bass layer In combination with the Low filter extensive possibilities for processing of bass sounds are d l E provided This way it is possible to
12. ilities 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 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 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 eithe
13. information about proportional Q principle of the filter and the recommendation of setting of bandwidth on page 8 Stereo O L 11 Operation 12 L Air 3D Enhancer CUT BOOST dB a 04 2 i 3 4 4 5 5 6 6 7 7 8 8 5 E Air The Air filter comprises of a passive network of capacitor resistor and coil in the same way as the Sub Bass filter It possesses a so called bell characteri stic with a center frequency at 17 5 kHz At this frequency the maximal possible boost or cut is 9 dB The inductivity of the coil possesses advantageous acoustic properties in comparison to simple condenser resistor filter stages The build up and decay behavior of the coil is somewhat sluggish which in this case provides softer sound characteristics Besides this coils produce a more pleasant harmonic spectrum so that processed signals obtain a vastly improved presence The Air filter is excellently suited to improve the presence of the high frequency range and to produce a silky tonal atmosphere This is an impor tant aspect for example in the restoration and tonal improvement of old recordings This in combination with the High filter provides extensive possi bilities for processing the top end With the Air filter a brilliant top end can be produced over which the High filter can superimpose frequency selective accents 3D Enhancer The 3D Enhancer serves the expansion of the stereo base The circuitry recognizes the
14. nal quality in the strictest sense of the word Power supply The toroidal transformer forms the basis for a clean power supply throughout the circuitry Carefully select a place for setting up the Stereo Q The unit should be situated away from heat sources and direct sunlight Avoid installation in environments exposed to vibrations dust heat cold or moisture Keep the unit away from transformers or motors or any other unit that could generate large variations in power supply or cause electrical interferences 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 place ment can prevent interference from Word Clock Smpte MIDI etc Do not open the case You may risk electric shock and equipment damages Leave repairs and maintenance to a qualified service technician Should foreign objects fall inside the case contact your authorized dealer or sup port person To avoid electric shock or fire hazards do not expose your unit to rain or moisture In case of lightning unplug the unit Please unplug the cable by pulling on the plug only never pull on the cable Never force a switch or knob To clean the case use a lint free cloth Avoid cleaning agents as they may damage the chassis Manufactured in standard 19 EIA format it utilizes two rack units Please support the back of the unit whenever it is being mounted into a 19
15. onsole s subgroups drums loops synth or vocal groups for example or master tracks is facilitated and improved by using a stereo EQ All control functions for both channels can be adjusted with one control a large time saver It is extremely important however that both channels are assured of being adjusted equally Differing adjustments could cause unsui table correlations of the stereo program the correction of which is very complicated The close adjustment tolerances of the Stereo Q reliably avoid this problem which makes it an extremely suitable unit for inclusion in a 5 1 surround studio where the need for coherent twin matching of both chan nels front L R or surround L R is paramount Even small and medium sized recording studios are now in a position to produce high quality masters Keyboard players or guitarists are provided with the perfect tool for fast production of stereo signals with outstanding tonal properties The filter circuits of the Stereo Q are serially constructed which prevents mutual influencing of the filters All components used are of high and selected quality Great value was laid on the selection of high quality capaci tors for incorporation into the frequency determining components Additionally the design of a clearly arranged front panel with comprehen sive legible scaling was given high priority large handy buttons with detented potentiometers guarantee a fast and assured adjustment Stereo O
16. r Jack connectors if unbalanced wiring is needed Alternatively unbalanced sig nals can be connected with mono Jack connectors to the balanced Jack sockets Generally all stereo signal equipment can be connected to the Stereo Q The diagrams on page 6 show various examples and their method of connec tion whether by XLR or Jack connectors It is of course possible to process mono signals either singly or in pairs if identical processing is required In order to keep the purest signal quality input and output level controls were intetionally ignored The Stereo Q processes all signals in a ratio 1 1 with a working level of 0 dBu in other words the signals are processed exactly as they come in Stereo O Connections VOLTAGE SELECTOR ao a a 100 120 EX DER conz es Pin wirings for balanced and unbalanced operation XLR and Jack Connections L 7 Operation 8 L General Advice Proportional Q principle Low Mid and High filters operate to the proportional Q principle This means that maximum possible boost and cut is dependant upon the selected bandwidth If the bandwidth is increased the measure of boost or cut amplitude decreases automatically with the setting of the Cut Boost control Obversely the amplitude increases automatically as the bandwidth decreases This has two practical advantages a large bandwidth is automatically treated more sensitively than a narrower bandwidth
17. r 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 14 L Stereo Q Copy Master 000000000000000000000000000000000000000000000000000090 199uIbuy punos 00000000000000000000000000 9Jeq 090000000000000000000000000000000000000000000000000000 3snay 090000000000000000000000000000000000000000000000000000000 uon3snpoid groz 1300W c c Tor Tug ap gp 33MO0d HLGIM 15009 LN AININOIY4 H LGAIMANVAa 15009 1 O Jozi enbq 091938 oneure1eq pueg f 0919 CO JALIDV D A2N3n0333 H1dIMQNVS 8p ap ap 15004 102 AIN3ND3Y4 HLGIMANVA 15004 102 15004 102 15 pl Stereo Notes 16 L Stereo Q
Download Pdf Manuals
Related Search