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Manual

Passive Equalizer with 120 V Makeup Amplifiers

Passeq

Model 2595

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Содержание Passeq 2595

Страница 1: ...L L L L L L L L L L L L L L L L L L L L L L L L PPTU 2 V U E PPT U E PPTU E P P T U E VU E VU E 4PVOE 1FSGPSNBODF BC 0VUQVU E L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L PPTU 2 V U E PPT U E PPTU E P P T U E VU E VU E 0VUQVU E PEFM 1BTTJWF RVBMJ FS 1BTTFR 7 BJO 4UBHFT ...

Страница 2: ...Processor Product Passeq Model 2595 Compliance Engineer Wolfgang Neumann Test Basis EN50081 1 1992 EN50082 1 1992 EN60065 1993 EN61000 3 3 1995 EN60065 2002 EN55013 2001 EN55020 2002 EN61000 3 2 2000 73 23 EWG 93 68 EWG We herewith declare that the construction of the Passeq Model 2595 is in compliance with the standards and regulations mentioned above Notes on environmental protection At the end ...

Страница 3: ...ndations on using Equalizers 16 Basic Approaches and Working Techniques EQ Yin Yang 16 First control levels then apply EQ First cut then boost Reducing bleed from other instruments or noise outside an instrument s frequency range Reducing bleed within an Instrument s frequency range Boosting harmonic frequency levels Boosting fundamental levels 17 Cutting fundamental levels Emphasis of an instrume...

Страница 4: ...ather disconnect the machine from wall power but to avoid life threatening lightning strikes not during a storm Similarly before any severe weather disconnect ALL the power connections of other machines and antenna and phone internet cables which may be interconnected so that no lightning damage or over load results from such secondary connections Air Circulation Chassis openings offer ventilation...

Страница 5: ...equipment Moreover this will ensure adequate air circulation to prevent overheating Do NOT locate other machines that produce excessive heat below the Transducer The rear side of the machine should be properly supported especially when transport is involved Warnings DO NOT PLACE THE MACHINE IN SUCH A WAY THAT IT MIGHT COME INTO CONTACT WITH OR SIT ON ANY FLUIDS AVOIDING SUCH CONTACT WILL AVOID HAZ...

Страница 6: ...s own dedicated core This excludes sonic degradation from mutual influences while at the same time improving THD values Special Features Individual design and component specificity for each filter Custom made coils for critical mid frequency ranges Boost and cut crossovers mesh perfectly so that with the high number of frequencies one can dependably command the most elaborate set of response curve...

Страница 7: ... work with like a precise mechanic cogwheel so as to allow the engineer access to the largest possible number of optimal wide band S curves with variable slopes A further noteworthy Passeq feature is its individual sonic adaptation of each induc tive filter through separate coil condenser resistor combinations In stark contrast to earlier filter design and construction each Passeq filter is optimi...

Страница 8: ...SUPRA components focused on high loop amplification extremely low phase shifting and THD combined with maximum amplification and a frequency response up to 100kHz A main and obvious advantage of the discrete SUPRA components is the exclusion of parts often found in industrially manufactured standard components that are not necessary for audio processing The SUPRA input stages are designed as balan...

Страница 9: ...straight electronic I O circuitry as Bass and fundamentals are rounder fuller and exhibit more punch while higher frequencies and harmonics sound silkier and more present yet without leaving the impression of being overly emphasized or singled out Moreover they add the subtle impression that mix elements are better localized The reasons for this are the tendency of transformers to reduce uneven ha...

Страница 10: ...50 3 6 3 4 0 3 03 53 4 0 0 05 9104 5 4 6 5 50 3 03 0 4563 4 0 5 4 03 3 07 07 3 5 4 26 1 5 645 35 3JHIU IBOOFM 3JHIU IBOOFM OQVU OQVU 0VUQVU 0VUQVU FGU IBOOFM FGU IBOOFM OQVU OQVU 0VUQVU 0VUQVU 5 9 3 1JO 8JSJOH 1JO 1JO PU 1JO PME 7 5 The GND Lift switch separates internal ground from chassis ground to eliminate ground loop humming Usually the GND lift should be deactivated switch down 7PMUBHF 4FMFD...

Страница 11: ...ally separated from each other Reflecting this fact the elements left of the central output control perform level cuts while controls to the right of this central regulator serve as signal boost controls Cut and boost switches are positioned next to the appropriate frequency band selector and frequency bands are arranged from low to high from the standpoint of both physical and frequency range lay...

Страница 12: ...udwig Ronald Prent and Peter Schmidt offered valuable advice From this point of departure we managed to determine that there is definite agreement among profes sionals about their preferred musical frequencies and these differ clearly from the standard ISO choices The results also showed that the closely meshed boost and cut frequencies are important and sensible Through them one can on the one ha...

Страница 13: ... 16k 15k 14k 13k 12k 11k 10k 8k6 8k6 7k8 7k5 7k 6k 6k 5k2 5k 5k 4k8 4k5 4k3 4k 3k9 3k5 3k3 2k9 2k8 2k5 2k4 2k3 1k9 1k9 1k8 1k8 1k6 1k3 1k2 1k2 1k2 1k 900 780 720 600 580 550 460 400 380 320 270 240 220 180 180 140 120 95 80 60 54 42 40 30 26 18 15 10 Operation Table Allocation of Frequencies ...

Страница 14: ...ow frequency options to insure realizing these goals MF MHF Cut and LMF MHF Boost The midrange bands elevate the Passeq to a complete combination of filter options that classic passive designs do not offer Both midrange bands exhibit peak filter characteris tics that is when viewed from the boost band the frequency curve appears as bell shaped slopes above and below the chosen frequency range The ...

Страница 15: ...d in the process retains the balance of high frequencies in relation to the entire frequency spectrum as one experiments with varying Q values While it is true that one must think independently of the scaled HF boost dB values in such cases because these only apply to a value of 1 the result is a simpler more musically sensible and worthwhile way to work that does not require continual additional ...

Страница 16: ...ts and verbalizations by Bob Katz whose superb Focal Press book based on a series of lectures entitled Mastering audio the art and the science we highly recommend In Chinese philosophy Yin and Yang describe unconditionally bound opposites within some kind of unity which in turn both complement and conflict with one other This idea also provides an insightful analogy to the understanding of the con...

Страница 17: ... an unnatural way Boosting harmonic frequency levels Harmonic enhancement is one of the foremost techniques for increasing the clarity and defi nition of an instrument The following is an overview for three typical instruments Bass 400Hz Bass lines will be accented Bass 1500Hz More clarity and attack sounds Guitar 3kHz Clearer attacks Guitar 5kHz Brighter more brilliance Vocals 5kHz More presence ...

Страница 18: ...n order to separate two instruments whose sound lies in the same range one may choose to process frequencies that are a half an octave from each other With a bandwidth of a half octave and 3dB boost one can achieve clarity and instrument differentiation The higher frequency should by applied to the instrument which sounds brighter or more brilliant Complementary filtering One of the most difficult...

Страница 19: ...sound of some guitars 800Hz boost Noticeably clearer punchier bass lines 1 5kHz cut Reduces an uninteresting sound in guitar tracks 1 5kHz boost Clearer cleaner basses 3kHz cut Hides badly tuned guitars or other problems with poor intonation 3kHz boost Better bass guitar attacks more attack with electric and acoustic guitars snares and other percussion as well as lower piano parts more voice clari...

Страница 20: ...s it will definitely not harm a Rock or Pop production to employ such an orien tation to achieve a comparable balance and proper distribution of mix elements in the latter Recommendations on using Equalizers 1JBOP 1JQF 0SHBO BTT 7JPMB 7JPMJO FMMP POUSB BTTPPO BTTPPO MBSJOFU 0CPF MVUF 1JDDPMP BTT 5VCB SFODI PSO 5SPNCPOF 5SVNQFU 5ZNQBOJ 4OBSF SVN ZNCBMT BMF 7PJDF FNBMF 7PJDF VOEBNFOUBM SFRVFODJFT BS...

Страница 21: ...rgy and this can change a tone s perceived sound Later when a musician has the impression that a recording is not true to the original that he or she has either played or sung an important consideration to make is to examine the resul tant frequency spectrum Sound Correction and Sound Design Along with acoustic influences of a recording ambience it should also be understood and accepted that to sa...

Страница 22: ...ases or decreases the energy of all frequencies above or below a chosen frequency Depending upon the direction of processing one refers to high frequency HF or low frequency LF shelf filters Beginning with the threshold frequency the frequency band is boosted or cut much like a shelf The maximum boost or cut achieved at the point furthest from the threshold frequency The threshold frequency is usu...

Страница 23: ...level is reduced Based on this overall reduction and relative to the original input signal one can achieve a further cut or boost in the form of a return to that original signal level Thus a passive filter is always followed by an amplifier which is responsible to regain the initial energy reduction and restore level balance between the input and output signal levels Passive filters react differen...

Страница 24: ...egorically Parametric EQs With a fully parametric EQ all filter parameters are adjustable The frequency amplitude and bandwidth of each filter can be adjusted by a user The fully parametric EQ is therefore ideally suited to working very specific or in very narrow limits at any desired frequency There is also the case of semi or half parametric filters whose bandwidth is fixed usually at around two...

Страница 25: ...power cord and IEC connector are VDE UL and CSA approved The AC fuse is rated at 500mA 230V version or 1A 115V version Inputs and Outputs Instrumentational amplifier transformer balanced Nominal Input Level 4dBu Input Impedance 22kOhm Output Impedance 600Ohm Max Input Level 28dBu Max Output Level 32dBu Measurements Frequency Range 20Hz 50kHz linear 50kHz 100kHz 3dB CMRR 70dBu 1kHz THD N 0dBu Input...

Страница 26: ...e two year guarantee through their distributor In such cases please contact your dealer for full guarantee conditions and service Direct SPL product support requires product registration Please fill out the guarantee card enclosed in the package legibly in printed letters and send it directly to SPL Or use the online registration form that may be reached at www soundperformancelab com internationa...

Страница 27: ...U E P P T U E P P T U E P P T U E V U E V U E 4PVOE 1FSGPSNBODF BC 0 V U Q V U E L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L P P T U 2 V U E P P T U E P P T U E P P T U E V U E V U E 0 V U Q V U E PEFM 1BTTJWF RVBMJ FS 1BTTFR 7 BJO 4UBHFT Artist Album Title Engineer Track s Groups Date ...

Страница 28: ...28 Passeq Manual Passeq ...

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