Electrocompaniet AW 300 M
Norwegian Electrocompaniet mono power amplifier, designed for biamping a high-end stereo system.
Description
The AW 300 M is a monoblock power amplifier, meaning a model dedicated to a single audio channel, designed to be used in pairs in a stereo installation. It sits within Electrocompaniet's range of mono power amplifiers, alongside larger models such as the AW 800 M, with a more compact format making it easier to integrate into an existing system.
The unit is based on a direct-coupled, high open-loop bandwidth topology, combined with a slew rate of 140 V/µs measured with the input filter disabled: this combination allows the amplifier to reproduce fast signal transients with great fidelity. Total harmonic distortion plus noise (THD+N) is 0.0006% and intermodulation distortion (IMD) is 0.001%, very low values reflecting minimal sonic colouration. The signal-to-noise ratio reaches 95 dB referenced to 1 W into 8 Ohms and 120 dB at full power, while input-referred noise remains below 2 µV. The DC output voltage is kept below 5 mV, an indicator of the stability of the amplifier's operating point.
This model is aimed at hi-fi enthusiasts wishing to build or upgrade a system in monoblock configuration, where each channel benefits from its own power supply and its own chassis. Its compact format compared with the brand's other monoblocks makes it suitable for installations where the space available around the electronics is limited, without sacrificing the technical performance expected of a high-end amplifier.
Technical specifications
| Input impedance | 330 kΩ |
| Frequency response (input filter active) | 0.5 – 220 kHz |
| Frequency response (input filter disabled) | 0.5 – 1.1 MHz |
| Voltage gain (mono input, balanced) | 29 dB (x28) |
| Input referred noise (20 20 kHz) | < 2 µV |
| SNR (ref. 1W/8Ω load, 20 20 kHz) | 95 dB |
| SNR (ref. full power output, 20 20 kHz) | 120 dB |
| Slew rate (input filter disabled) | 140 V/µs |
| DC output voltage | < 5 mV |
| THD+N | 0.0006 % |
| IMD | 0.001 % |
| Rated output power (8 Ohms) | 300 W |
| Rated output power (4 Ohms) | 600 W |
| Rated output power (2 Ohms) | 100 W |
| Dimensions (W x D x H) | 212 x 488 x 292 mm |
What to check before buying used
On a power amplifier of this type, attention should first focus on the power supply capacitors and output components, whose ageing can affect power handling over time. It is worth checking for the absence of background noise, hum or abnormal DC output voltage at the speaker terminals, this parameter being specified as very low from the factory on this model. Checking the input connectors and output terminals, along with a load test over an extended period, helps ensure the unit maintains thermal stability.
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