The Proton D940 is a vintage stereo receiver from the mid-1980s, delivering 40 watts per channel into 8 ohms with a total harmonic distortion of just 0.02%. It features Dynamic Power on Demand (DPD) technology, providing short-term power bursts up to 160 watts into 8 ohms and 280 watts into 4 ohms, allowing it to handle demanding audio peaks. The receiver also includes Schotz Noise Reduction (SNR) for FM broadcasts, 8 FM and 8 AM station presets, and versatile connectivity for various audio sources, making it a reliable choice for audiophiles of the era.

In terms of dimensions, the Proton D940 measures approximately 420 × 96 × 288 mm (W × H × D) and weighs around 8.5 kg (18.7 lbs). Its compact size and solid build make it suitable for home audio setups, while the sleek front panel and functional layout provide ease of use. Despite its age, the D940 remains sought after among vintage audio enthusiasts for its clarity, power handling, and overall performance.