Manuale d’uso / di manutenzione del prodotto Pro VLA II del fabbricante Art
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Pro VLA II™ PROFESSIONAL TWO CHANNEL VACTROL ® /TUBE LEVELING AMPLIFIER USER’S GUIDE.
IMPORTANT SAFETY INSTRUCTIONS – READ FIRST This symbol, wherever it appears, This symbol, wherever it appears, alerts alerts you to the presence of uninsulated you to important operating and maintenance dangerous voltage inside the enclosure. Voltage in structions in the accompanying literature.
Pro VLA II PROFESSIONAL TWO CHANNEL VACTROL ® /TUBE LEVELING AMPLIFIER IMPORTANT SAF ETY INSTRU CTIONS – RE AD FI RST .......................................................................... 1 INTRODUC TION ...................................
INTRODUCTION Thank you for purchasing Applied Research and Technology ’s Pro VLA II . Offering a superb level of sound quality, the Pro VLA II has a unique design that will enhance the sonic textures of your audio system for years to come. The Pro VLA II is one of the finest audio compressors available.
Unpacking Your Pro VLA II was packed with care at the factory. The shipping carton was designed to protect it during initial shipment. Please retain this carton for use in transporting the Pro VLA II when it is not installed in a rack, or in the unlikely event that you need to retu rn your Pro VLA II for servicing.
FRONT PANEL CONTROLS and INDICATORS Power The POWER switch turns the power on and off to the unit. The Pro VLA II should be turned “on” with all monitor levels turned down to protect against any “thumping” caused by power up. Likewise, the Pro VLA II should be turned “off” after turning all monitor levels down.
FIGURE 1 – Channel 1 Controls Output Level Control The OUTPUT LEVEL control serves two functions. The CH1 knob always controls the output level of CH1, but can also serve as a “MASTER” output level when the Link Mode is active. The fully counter-clockwise position of the knob mutes the output.
Release Control The RELEASE control sets the time the Compressor/Limiter takes to increase the gain after the input level drops. Longer settings maintain the dynamics of the input si gnal, while shorter settings reduce the dynamics.
FIGURE 2 – LED Output Meter and Link Switch LED Output Meter This meter displays both average and peak levels of the output signal. The LED labels indicate how far the output is away from full maximum output in dB. In each bargraph, a single LED is held on for a little over one second, displaying the peak level.
REAR PANEL I/O The Pro VLA II™ XLR connectors follow the AES standard of: Pin 1 = Ground, Pin 2 = Hot (+), Pin 3 = Cold (-). The balanced 1/4” phone jacks are typical TRS connection s: Tip - Hot (+), Ring - Cold (-), Sleeve - Ground. Balanced Inputs The Pro VLA II™ provides both an XLR and 1/4” input jack.
FIGURE 3 – Rear Panel Balanced Outputs The analog output of the Pro VLA II™ is available on both a 1/4” TRS balanced ja ck and an XLR jack. This output is active pseudo balanced. The output has a 100 Ohm impedance into a balanced or unbalanced loa d.
APPLIC ATIONS Compressor/ Limiter The main application of the Pro VLA II™ is to control the dynamic range of an au dio signal. Plug a line level (post preamplifier or other gain stage) source into either input, and set the threshold and output controls to provide the desired amount of compression to the input signal.
WARRANTY INFORMATION Limited Warranty: Applied Research and Technology will provide warrant y and service for this unit in accordance with the following warrants: Applied Research and Technology, (ART.
SERVICE The following information is provided in the unlik ely event that your unit requires service. 1) Be sure that the unit is t he cause of the problem. Check to make sure the unit has power, all cables are connected correctly, and t he cables themselves are in work ing condition.
SPECIFICATIONS Input Impedance Balanced/Unbalanc ed ................................................................ 10K Ohms Maximum Levels Range Swit ch ............................................................................. +4dB u/-10dBV selectable Inputs .
www.artproaudio.com E-mail: support@artproaudio.com © 2007 Applied Research & Technology 213-5004-100 e 15.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Art Pro VLA II è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Art Pro VLA II - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Art Pro VLA II imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Art Pro VLA II ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Art Pro VLA II, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Art Pro VLA II.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Art Pro VLA II. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Art Pro VLA II insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
