Instruction/ maintenance manual of the product GFA-555se Adcom
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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 ..........
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An important point after buying a device Adcom GFA-555se (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Adcom GFA-555se yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Adcom GFA-555se - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Adcom GFA-555se you will learn all the available features of the product, as well as information on its operation. The information that you get Adcom GFA-555se will certainly help you make a decision on the purchase.
If you already are a holder of Adcom GFA-555se, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Adcom GFA-555se.
However, one of the most important roles played by the user manual is to help in solving problems with Adcom GFA-555se. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Adcom GFA-555se along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
