ArtメーカーMPA Goldの使用説明書/サービス説明書
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ART MPA Gold™ Microphone Preampli fier 2 TABLE OF CONTENTS Introducti on ............................................................................................ 3 Intr oduction ...................................................................
ART MPA Gold™ Microphone Preampli fier 3 MPA GOLD INTRODUCTION The ART MPA Gold™ microphone preamplifie r features a new low noise, high performance preamplification circuitry design ed for superior audio fidelity.
ART MPA Gold™ Microphone Preampli fier 4 FRONT PANEL CONTROLS Input Gain control This control optimizes the input signal leve l before the tube gain is applied. Both Microphone and Instrument input gains remain the same and are affected by this adjustment.
ART MPA Gold™ Microphone Preampli fier 5 Both the microphone and instrum ent inputs are optimized for t heir respective sources as far as signal levels and noise performance. Running most of the gain on the input generally provides the best performance of t he MPA Gold.
ART MPA Gold™ Microphone Preampli fier 6 Phantom switch Phantom power on the microphone input is turned on and off with this switch. Depressing the switch will power condens er microphones and ot her 48volt phantom powered devices. Phantom power is suppli ed to pins 2 and 3 of the input jack.
ART MPA Gold™ Microphone Preampli fier 7 In the “normal” (OUT) position, the tube dist ortion gradually rises until it smoothly clips. The tube is run almost completely open-loop in this mode, providing a musical tube “crunch” when overdriven with a natural recove ry from clipping.
ART MPA Gold™ Microphone Preampli fier 8 When you plug into this jack it DISABLES th e balanced input on the rear of the unit. This feature allows you to keep the rear input patched in, and use the instrument input to switch to a different source. The instrum ent input allows the MPA Gold to serve as a great DI device as well.
ART MPA Gold™ Microphone Preampli fier 9 MPA GOLD SIGNAL FLOW SIGNAL PATH FLOW The signal path of the MPA Gold consists of a discr ete class A microphone pre-amp followed by a Hi Pass Filter, a balanced different ial tube circuit with a 20dB Gain switch and then the phase switch.
ART MPA Gold™ Microphone Preampli fier 10 MPA GOLD OPERATING INSTRUCTIONS Obtaining the best noise pe rformance with the MPA GOLD Start by turning down the I nput Gain knob and centering t he Analog Output knob. Use the analog meter to view the operating level by depressing the switch under the center of the analog meter.
ART MPA Gold™ Microphone Preampli fier 11 Start by setting the centeri ng the Input Impedance knob. This provides a 600-Ohm load. Lower impedance loads will reject more noise picked up by cabling, and dampen microphone resonance. Higher impedance settings provide a more “open” sound.
ART MPA Gold™ Microphone Preampli fier 12 WARRANTY INFORMATION Limited Warranty Applied Research and Techno logy will provide warranty and service for this unit in accordance with the following warr.
ART MPA Gold™ Microphone Preampli fier 13 SERVICE The following information is provided in t he unlikely event that your unit requires service. 1) Be sure that the unit is the cause of the problem. Check to make sure the unit has power supplied, all cables are connected correctly, and the cables themselves are in working condition.
ART MPA Gold™ Microphone Preampli fier 14 14 MPA GOLD SPECIFICATIONS Dimensions: 6.5” D x 19.0” W x 3.5” H Weight: 12 Lb. Frequency Response 15Hz to 48 kHz (+0, -1dB) @ normal plate voltage 15Hz to 120 kHz (+0, -1dB) @ high plate voltage Dynamic range: >110dB (“A” weighted) CMRR: >90dB THD: <0.
デバイスArt MPA Gold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 MPA Gold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 MPA Gold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 MPA Gold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 MPA Gold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 MPA Gold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 MPA Gold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 MPA Gold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 MPA Gold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。