ArtメーカーPro VLA IIの使用説明書/サービス説明書
ページ先へ移動 of 16
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.
デバイスArt Pro VLA IIの購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Art Pro VLA IIをまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはArt Pro VLA IIの技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Art Pro VLA IIの取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Art Pro VLA IIで得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Art Pro VLA IIを既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はArt Pro VLA IIの不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Art Pro VLA IIに関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちArt Pro VLA IIデバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
