Congratulations on your purchase of the Adcom GFA-555se

You have made a wise choice that will reward you with exceptionally accurate musical sound reproduction for years to come. To realize the full potential of your new amplifier, please read these operating and installation instructions thoroughly before attempting to make any connections to it.

The GFA-555se is not only designed to reproduce the highest quality sound but also to deliver the greatest possible value. It is our engineers’ passion for perfection that has enabled our components to be judged the equivalent of others costing two, three, or even five times as much. Our engineering team consistently strives to develop and design products that will exceed your expectations. Our goal at Adcom is to let more consum- ers hear high-end quality sound without paying high-end prices.

All Adcom components are the result of a long-standing dedication to innovation, quality, simplicity, and value. Adcom: We have the power — and now, so do you!

WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK,

DO NOT REMOVE COVER (OR BACK);

NO USER-SERVICEABLE PARTS INSIDE;,

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

The lightning flash with arrowhead sym- bol, within an equilateral triangle, is in- tended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock.

The exclamation point within an equilat- eral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appli- ance.

Do not place this unit on an unstable cart, stand, tripod, bracket, or table. The unit may fall, causing serious injury to a child or adult, and serious damage to the unit. Use only with a cart, stand, tripod, bracket, or table recommended by the manufacturer or sold with the unit. Any mounting of the device should follow the manufacturer’s instructions, and should use a mounting accessory recommended by the manufacturer.

AVERTISSEMENT

DANGER D’ÉLECTROCUTION

NE PAS OUVRIR

AVERTISSEMENT:POUR ÉLIMINER TOUT RISQUE

D’ÉLECTROCUTION, NE PAS OUVRIR LE COUVERCLE (OU LA PARTIE ARRIÈRE). AUCUNE PIECE RÉPARABLE PAR L’UTILISATEUR NE SE TROUVE À L’INTÉRIEUR. POUR TOUTE INTERVENTION D’ENTRETIEN OU DE RÉPARATION SE CONFIER AUX TECHNICIENS QUALIFIÉS.

La flèche symbolisant l’éclair dans un triangle équilateral a pour objet de tirer l’attention de l’utilisateur sur le fait, qu’ il y a des “tensions dangereuses” non- isolées à l’intérieurde l’enceinte du produit qui peuvent être suffisamment importantes pour conduire au risque d’électrocution.

Le point d’exclamation au sein d’un tri- angle équilateral a pour objet de tirer l’attention de l’utilisateur sur le fait qu’ il y a des instructions de mise en ser- vice et d’entretien (de réparation) dans les fiches descriptives de l’appareil qui doivent obligatoirement être respectées.

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Adcom GFA-555se owner manual Avertissement
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GFA-555se specifications

The Adcom GFA-555se is a high-performance audio power amplifier that stands out for its robust design and exceptional sound quality. Renowned among audiophiles, it offers a blend of remarkable power output and fidelity, making it suitable for a wide range of audio systems.

One of the main features of the GFA-555se is its impressive power output, rated at 200 watts per channel into 8 ohms and 330 watts per channel into 4 ohms. This ample power allows it to drive a variety of speakers efficiently, delivering dynamic and impactful sound reproduction. The amplifier is designed to handle both high and low frequencies with precision, ensuring a balanced audio experience.

In terms of technology, the GFA-555se employs a classic Class AB design, which is known for its ability to combine the efficiency of Class B operation with the linearity of Class A. This results in lower distortion and better thermal management, contributing to a cleaner sound, particularly at high volumes. The amplifier also incorporates a high-speed output stage, which enhances transient response and enables the reproduction of fast-paced musical passages without degradation.

Another notable characteristic of the GFA-555se is its build quality. The chassis is constructed from heavy-duty aluminum, which not only results in durability but also helps to dissipate heat effectively. This is crucial in maintaining performance and longevity, as overheating can lead to shortened component life. Additionally, the amplifier features a massive power supply with a large transformer, providing stable voltage and current to the output stage, which further enhances audio performance.

The GFA-555se is equipped with unbalanced RCA inputs and can be easily integrated into existing audio setups, making it a versatile choice for both home theater and stereo systems. With its impressive parasitic rejection and low noise floor, it ensures that the audio signal remains clean and unaffected by external interference.

In conclusion, the Adcom GFA-555se is a powerful and reliable amplifier that combines advanced technologies with robust construction. Its ability to deliver high-quality sound across a broad range of frequencies, along with its impressive power output and efficient design, makes it a popular choice among music enthusiasts and professionals alike. Whether used as part of a high-end audio system or in a home theater setup, the GFA-555se continues to be a respected component for achieving an immersive listening experience.
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