Adcom GFA-565se Stereo Power Amplifier

Adcom GFA-565se Stereo Power Amplifier at Vinyl Sound Buffalo NY

The Adcom GFA-565se is a high-power stereo amplifier we unhesitatingly recommend for even the most demanding high-end systems. A compact sibling of the flagship GFA-575se, it sacrifices nothing when it comes to the revelation of nuance and inner detail. Delivering 250 watts per channel into 8 ohms and maintaining that output unconditionally into any loudspeaker load, the GFA-565se combines genuine high-current authority with the musical transparency expected from a reference-class amplifier. Available at Vinyl Sound in Buffalo, NY.

High-Current Performance and Noise Rejection

Engineered with both balanced and unbalanced power stages, the GFA-565se delivers a high level of noise rejection and lower transient distortion across the full operating range. Its ability to draw maximum current from the power supply as demanded by the musical waveform ensures accuracy, dynamics, and control that remain composed regardless of how complex or reactive the speaker load becomes. The GFA-565se is capable of effortlessly driving a wide variety of loudspeakers, including those with exceptionally low impedances, maintaining high-power output consistently even when faced with reactive impedances where the phase differences between voltage and current are significant.

Power Supply Design

At the heart of the GFA-565se is a robust power supply featuring a generously sized transformer feeding a 72,000µF filter capacitance reservoir. This substantial energy reserve ensures that the amplifier has instantaneous access to the current demanded by any musical transient, without compression or limiting. The transformer was purposefully engineered for exceptional voltage regulation, guaranteeing stable voltages regardless of the power demands placed on either channel. Notably, the GFA-565se possesses the ability to amplify DC signals and is unrestricted in its capacity to deliver energy across low-frequency and peak-bass ranges.

Build Quality and Construction

Great care has been taken to ensure the GFA-565se is as flawless in appearance as it is electronically. The front panel is crafted from heavy-gauge anodized aluminum extrusion for durability and a clean, professional finish. The chassis, top cover, and rear panel are heavy-gauge steel, both painted and baked for long-term reliability. Gold-plated brass RCA input jacks with Teflon insulators reflect the same uncompromising attention to quality found throughout the design.

Key Features

• 250W per channel into 8 ohms / 350W per channel into 4 ohms with unconditional full-power delivery into any speaker load
• Bridgeable to 700W mono into 8 ohms for maximum single-channel output
• 72,000µF power supply filter capacitance for massive energy reserve and precise transient response
• Damping factor greater than 800 (20Hz to 20kHz) for exceptional speaker control and bass authority
• Balanced XLR and unbalanced RCA inputs for compatibility with professional and consumer preamplifiers
• Gold-plated brass RCA input jacks with Teflon insulators for premium signal integrity
• DC amplification capability for unrestricted low-frequency and peak-bass energy delivery
• Front-panel thermal overload LED indicator for real-time safety monitoring
• Heavy-gauge anodized aluminum front panel and baked steel chassis built for decades of reliable service
• Dual voltage compatible at 120VAC and 230VAC / 50-60Hz for worldwide use

Technical Specifications

Frequently Asked Questions

What is the Adcom GFA-565se?

The Adcom GFA-565se is a high-current stereo power amplifier rated at 250 watts per channel into 8 ohms and 350 watts per channel into 4 ohms, bridgeable to 700 watts mono into 8 ohms. It features a 72,000µF power supply filter capacitance, a damping factor greater than 800, and both balanced XLR and unbalanced RCA inputs. Available at Vinyl Sound in Buffalo, NY.

What is the power output of the Adcom GFA-565se?

The GFA-565se is rated at 250 watts per channel into 8 ohms and 350 watts per channel into 4 ohms in stereo mode. In bridged mono mode it delivers 700 watts into 8 ohms. Full power output is maintained unconditionally into any loudspeaker load, including those with very low impedances and highly reactive characteristics.

How is the GFA-565se different from the GFA-575se?

The GFA-565se is a compact version of the more powerful GFA-575se, sharing the same design philosophy and commitment to high-current performance but in a smaller chassis with a lower power rating. The GFA-565se's 250 watts per channel and 72,000µF power supply make it the preferred choice for systems where the GFA-575se's higher output is not required, while still delivering the same unconditional speaker load stability and high damping factor.

What does bridging the GFA-565se do and when is it useful?

Bridging combines both stereo channels of the GFA-565se into a single high-output mono amplifier delivering 700 watts into 8 ohms. This is useful when driving a single high-power loudspeaker, a passive subwoofer, or any application demanding the full output capability of the amplifier in a single channel. A minimum speaker impedance of 8 ohms is recommended in bridged mono mode.

What is the role of the 72,000µF filter capacitance in the GFA-565se?

The 72,000µF power supply filter capacitance in the GFA-565se acts as an energy reservoir that stores charge and releases it instantaneously when the musical signal demands it, without waiting for the transformer to respond. This ensures that the amplifier maintains stable output voltage during transient peaks, preventing compression or audible clipping during demanding passages.

Where can I buy the Adcom GFA-565se in the USA?

The Adcom GFA-565se is available at Vinyl Sound, an authorized Adcom dealer in Buffalo, NY. Browse the full power amplifier collection at Vinyl Sound or contact our team for system matching advice and in-store listening appointments.