Input Sensitivity

200 watts into 8 ohms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.75V rms 1 watt into 8 ohms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130mV rms

Damping Factor

2OHz to 2OkHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥ 900

Rise Time

5kHz, 120V peak-to-peak square wave, 20% to 80%. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3μS

Power Consumption (Continuous, Both Channels Driven)

Quiescent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72VA Maximum. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500VA 200 watts into 8 ohms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 675VA 325 watts into 4 ohms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1180VA 600 watts into 8 ohms, bridged. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1320VA

General

Power (available in 230V by special order). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120VAC—50/60Hz Chassis Dimension. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15/16” (176mm) x 12-1/8” (308mm) x 16-15/16” (430mm) Maximum Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1/2” (191mm) x 12-1/2” (318mm) x 17” (432mm) Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 lbs. (16.3kg) Weight, Packed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 lbs. (18.1kg)

Specifications subject to change without notice.

Copyrights/Trademarks

Published by Advanced Sound and Image Copyright © 2008 Advanced Sound and Image, LLC All rights reserved

Adcom and the Adcom logo are registered trademarks of Advanced Sound and Image, LLC

No part of this manual may be reproduced or electronically transmitted without the express written consent of Advanced Sound and Image, LLC. Advanced Sound and Image, LLC shall not be liable for any errors contained herein or for any damages arising out of or related to this document or the information contained herein, even if Advanced Sound and Image, LLC has been advised of the possibility of such dam- ages. This document is intended for informational and instructional purposes only. Advanced Sound and Image, LLC reserves the right to make changes in the specifications and other information contained in this document without prior notification. Advanced Sound and Image, LLC disclaims any obligation to update the information contained herein.

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Adcom GFA-555se owner manual Specifications subject to change without notice, Damping Factor
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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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