IM Distortion, Bridged (CCIF, Any Combination from 4kHz to 20kHz)

400wattsinto8ohms

0.005%

THD + Noise at 400 Watts into 8 Ohms, Bridged

 

20Hz

0.004%

1kHz

0.004%

10kHz

0.020%

20kHz

0.050%

Frequency Response @ 1 Watt into 8 Ohms

 

10Hzto20kHz

+0.0.25dB

Power Bandwidth (-3dB)

10Hzto100kHz

Dynamic Headroom into 4 Ohms

1.3dB

Signal-to-Noise Ratio, "A" Weighted

 

125wattsinto8ohms

102dB

Gain

27.2dB

Input Impedance

100,000ohms

Input Sensitivity

 

125wattsinto8ohms

1.38Vrms

1wattinto8ohms

123mVrms

Damping Factor

 

20Hzto20kHz

>400

Rise Time

 

5kHz,90Vpeaktopeaksquarewave,20%to80%

2.3us

Semiconductor Complement

34transistors,2zenerdiodes,

 

13diodes,2ICs,2diodebridges

Power Consumption (Continuous, Both Channels Driven)

Quiescent

48VA

Maximum

900VA

125wattsinto8ohms

420VA

200wattsinto4ohms

730VA

Page 20
Image 20
Adcom GFA-555MS manual

GFA-555MS specifications

The Adcom GFA-555MS is a high-performance power amplifier that has established a reputation for its reliability and excellent sound quality. This amplifier, developed by Adcom, an American audio company known for producing high-quality audio components, is often sought after by audiophiles and professionals alike for its unique features and robust build.

One of the standout characteristics of the GFA-555MS is its impressive power output. With a continuous power rating of 200 watts per channel into 8 ohms, and even more when driving lower impedances, it provides ample power to drive a wide variety of speakers. This ensures that users can enjoy dynamic sound reproduction, whether they are listening to music at moderate volumes or cranking it up for a party.

The GFA-555MS is designed using a high-current, Class AB topology, which strikes a balance between efficiency and sound fidelity. This design allows for clean, detailed audio reproduction while minimizing distortion. The amplifier is renowned for its ability to handle complex musical passages and reproduce them faithfully, making it a favorite among music lovers who appreciate the nuances of their favorite recordings.

Another notable feature is its advanced thermal management system. The GFA-555MS is equipped with substantial heat sinks and a robust power supply that allows it to operate efficiently without overheating. This is particularly beneficial for sustained listening sessions or when driving demanding speaker loads.

In terms of connectivity, the GFA-555MS offers various input options, including RCA and XLR connections, making it versatile enough to integrate into a range of audio systems. This flexibility is complemented by its exceptional build quality, with a solid chassis that not only enhances durability but also minimizes vibrations that could interfere with sound quality.

The amplifier also includes additional features such as DC protection circuitry and a comprehensive output stage protection system. These safeguards help protect both the amplifier and the connected speakers from potential damage due to short circuits or overheating.

Overall, the Adcom GFA-555MS stands out in the realm of audio amplifiers. Its combination of power, sound quality, and advanced technologies make it a preferred choice for both casual listeners and serious audiophiles. Whether for home theater setups or music playback, the GFA-555MS delivers performance that is hard to match, making it a true classic in the audio world.