AdcomメーカーGFA-555seの使用説明書/サービス説明書
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OWNER’S MANUAL GF A-555se High-Current Power Amplifi er.
2 Congratu lations on your pur chase of the Adcom GF A- 5 55se Y o u h ave ma de a w i s e c ho ice th at w ill re wa rd y o u w ith except io nally acc ur ate mu si cal s o un d rep ro d u c tio n for yea rs to come .
T ABLE OF CONTENTS LETTER FROM THE ADCOM TEAM ................. 2 SAFETY INFORMA TION ............................ 4 DESCRIPTION OF UNIT GF A-555se FEA TURES ............................. 5 W ARRANTY INFORMA TION ......................... 5 INST ALLA TION & HOOKUP UNP ACKING THE GF A-555se .
• Read all the saf et y and oper ating instructio ns before con- nec ting or using this unit. • Retain this notic e and the owner’ s manual for f uture refer - ence . • All warnings on the u nit and in i ts op erating instru ctions should be adhere d to.
GF A-555se FEA TURES • P recision-matched devices used throughout the signal path. • 60,000 μ F of power supply- fi lter capacitance for greater reserve capacity . • Independent power supplies for each channel. • Fewer gain stages improve signal reproduction accuracy .
INTRODUCTION Congratulations on your decision to purchase the GF A-555se power ampli fi er . By use of updated components in the classic ADCOM GF A-555 design, we have reestablished our heritage of high performance and audiophile quality at the greatest possible value.
7 CONNECTING THE GF A-555se When connecting the ampli fi er to the loudspeaker , it is vital to maintain proper polarity (positive to positive, negative to negative). On the GF A-555se , the positive terminal is color coded RED and labeled “+”, and the negative is color coded BLACK and labeled “-”.
T o set the ampli fi er in bridged mono operation, fl ip the STEREO/BRIDGED input switch into the BRIDGED position. When in the bridged mono mode, input to the ampli fi er is made only through the LEFT input jack. The connection to the RIGHT input jack should be removed since the right-channel input portion of the ampli fi er is inoperative.
thermal protection channel model GFA-555se power L R high current power amplifier instantaneous distortion alert FRONT P ANEL ( 7 ) ( 10 ) ( 9 ) ( 8 ) REAR P ANEL ( 3 ) ( 1 ) ( 5 ) ( 4 ) ( 2 ) (1) Inp.
10 DESCRIPTION OF UNIT : REAR P ANEL (1) Inputs (unbalanced) The audio inputs for the GF A-555se are through high-quality , gold-plated RCA jacks to minimize high-frequency losses, noise, etc. They will accept standard RCA-type plugs, one for each channel; Left and Right.
11 (6) Mode Switches For normal stereophonic mode of operation, the STEREO/BRIDGED input switch should be set to STEREO. Otherwise, the ampli fi er will operate in the bridged mono input mode by which you will amplify only the left channel through both outputs of the ampli fi er .
12 RESOL VING PROBLEMS Use the chart below to solve common situations that don’t require professional attention. If the steps stated in POSSIBLE SOLUTION do not resolve your problem, then please contact your ADCOM Dealer or call the ADCOM Customer Service Department.
For Fax inquires, please include a return Fax number for the reply. When calling or writing about your GF A-555se, be sure to note and refer to its serial number as well as the date of purchase and the dealer from whom it was purchased. In any communications to us, please include a daytime phone number where we may reach you.
GF A-555se SPECIFICA TIONS Power Rating (To FTC Requirements) 200 Watts continuous average power into 8 ohms at any frequency between 20Hz and 20kHz with both channels driven at less than 0..04% THD. 300 Watts continuous average power into 4 ohms at any frequency between 20Hz and 20khz with both channels driven at less than 0.
Input Sensitiv ity 200 watts into 8 ohms ................................................................ 1.75V rms 1 watt into 8 ohms .................................................................. 130mV rms Damping Factor 2OHz to 2OkHz ..........
854 1 East Anderson Dr ive , Suit e 10 1 Sco tts da le , Ar izona 85 255 Voi ce: 4 8 0.6 0 7 . 2 27 7 Fa x : 4 8 0 . 3 4 8 .98 76 w w w . adcom . com GFA- 555 se _ ma nu al _v1.
デバイスAdcom GFA-555se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：
Adcom GFA-555se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Adcom GFA-555se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。Adcom GFA-555se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。Adcom GFA-555se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。
Adcom GFA-555se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Adcom GFA-555se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、Adcom GFA-555se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Adcom GFA-555se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。
