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®
Owner´s Manual
®
STEREO
Models 9319, 9320
SOUND PERFORMANCE LABORATORY
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SOUND PERFORMANCE LABORATORY STEREO VITALIZER Owner´s Manual by Paul White 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 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 L
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Forword 3 Contents Introduction 4 Operation safety 4 Connections 5 Applications Studio 6 Tape - duplication 7 Broadcast 7 Sound reinforcement 8 Video & film post production 8 First steps 9 The control elements of the STEREO VITALIZER 11 VITALIZER ACTIVE 11 PEAK 11 BASS 11 MID-HI TUNE 12 PROCESS 13 HARMONICS 14 SURROUND PROCESSOR IN 15 STEREO WIDTH 15 Power supply 15 Specifications 16 Warranty 17 Dear customer, Foreword Thank you for the confidence you have shown towards SPL electronics GmbH by p
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The STEREO VITALIZER is an equalizer concept which makes use of scientific Introduction 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 an
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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) From autumn 1995 only version 2 will be av
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1 1. . The most obvious application of the STEREO VITALIZER is to process a Applications: 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 Studio 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 acclimates to chan
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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
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In live performance or in club installations, the STEREO VITALIZER is a Sound powerful ally in maintaining speech intelligibility under difficult conditions. It is also of great benefit in systems designed to play recorded music Reinforcement 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 f
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When setting up the STEREO VITALIZER for the first time, it is wise 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) 1. Press the ACTIVE switch. There is no audible change in the sound a
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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 turn
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The control 5 4 3 7 elements of the ® STEREO VITALIZER 2 6 1 8 The VITALIZER ACTIVE function switches the STEREO VITALIZER on or off. The 1 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 STE
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The PROCESS control determines the processing 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. Fig.1: The dotted line shows f
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appropriate frequencies, thus changing the spectral content of the original signal. The STEREO VITALIZER , however, 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 MID-HI TUNE filter can raise
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STEREO VITALIZER alters the frequency spectrum in such 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 an
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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 two filters therefore complement each other in an ideal fashion. The IN switch switches the SURROUND PROCESSOR on or off. The status-LED Surround 7 indicates, that the SURROUND PROCESSOR is activ. The IN switch works only Processor when the VITALIZER ACTIVE switch is activated. In In case you want to monitor the SURROUND PROCESSOR in isolation,
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V Ve er rs siio on n 1 1 Model 9319 V Ve er rs siio on n 2 2 Model 9320 STEREO VITALIZER Rear Panel Specifications Version 1 (Model 9319, unbalanced jack-version, until autumn 1995) - unbalanced input & output stages (0 dB) - mono-1/4inch-jacks - 2-wire power cord - relais-hard-bypass Version 2 (Model 9320, unbal. jacks & bal. XLR-Version) - balanced (+6 dB) & unbalanced (0 dB) input & output stages - NC3 XLR-connectors and mono-1/4inch-jacks - voltage selector: 220-240 V/50 Hz or 100-120 V/
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SPL electronics GmbH (hereafter called SPL) products are warranted only in the Warranty 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 wor
