GALACTRON MK 2245

Second-hand. In excellent conditions. Free from visible signs of wear. Comes with original packaging, remote control, and manual (ITA).

The Galactron MK 2245 is an integrated amplifier built with solid-state technology and operating in class AB biasing, designed to deliver highly coherent tonal reproduction and precise dynamic control. Its architecture features an exceptionally robust power supply section that utilizes a 320VA toroidal transformer and a massive 87,000 μF of total filtering capacity, ensuring fast and stable response even during demanding musical passages. The electronic power circuit is stabilized and exhibits extremely low ripple, which contributes to maintaining a clean audio signal.

The amplifier’s output stage employs two carefully matched pairs of MOSFETs per channel, each rated at approximately 20A, capable of delivering high current with low output resistance. This configuration results in outstanding bass control and accurate rendering of fine sonic nuances across the entire frequency spectrum. Its dynamic behavior allows the amplifier to nearly double its power output when the load impedance is halved, with no imposed current limits beyond those inherent to the power supply itself. The overall tonal character is refined, offering both micro and macro detail with a natural and engaging harmonic presentation.

The preamplification stage and input management are also solid-state, utilizing low-noise, high-quality integrated components such as Burr-Brown chips with high slew-rate values. The unit includes four RCA line-level input sections, enabling simultaneous connection and flexible control of multiple audio sources. Volume control operates in precise steps and can be managed via the included remote control, with a switching system that provides multicolor LED indicators to display the amplifier's operating status.

The MK 2245 features an intelligent power-on system: a rear switch powers the entire unit, allowing it to reach its optimal operating temperature before the main activation via remote control. An automatic output muting delay ensures a safe transition to playback. Additionally, a warm-up system shortens the amplifier’s stabilization period to about twenty minutes, though it remains usable immediately after switch-on, with performance gradually improving and reaching full potential after approximately thirty minutes.

For maximum reliability, the amplifier should be placed in a well-ventilated area, as the power stage heatsinks can reach internal temperatures of up to 60°C during intensive use. If this threshold is exceeded, a thermal protection system automatically cuts the power to protect both the amplifier and connected speakers. The Galactron MK 2245 stands out as a high-performance unit with a strong personality, aimed at those seeking control, detail, and musical finesse.

Technical Specifications:

• RMS Power Output into 8 Ohms: 2 x 60 W
• RMS Power Output into 4 Ohms: 2 x 75 W
• RMS Power Output into 2 Ohms: 2 x 90 W (current-limited)
• Peak Output Current: 20 A
• Frequency Response: 20 Hz – 60 kHz (±0.5 dB)
• Total Harmonic Distortion (THD) at full power: 1.6%
• Signal-to-Noise Ratio (S/N): 96 dB
• Input Sensitivity for Maximum Power: 350 mV / 50 kOhm (RCA input)
• Dimensions (H x W x D): 140 mm x 450 mm x 470 mm (including connectors)
• Weight: 15 kg