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Comparison · Power supplies

PTA-600W-12V (500 W, 40 A) or 500 W Switching Power Supply for Audio Amplifiers

Two models side by side: measurements taken by the author in their reviews, and their conclusions. The better value in each row is highlighted.

In brief: Based on review measurements: Efficiency: 500 W Switching Power Supply for Audio Amplifiers (91.6 % vs. 84); Temperature rise: PTA-600W-12V (500 W, 40 A) (105 °C vs. 146).

ModelPTA-600W-12V (500 W, 40 A)PTA-600W-12V (500 W, 40 A)2025Read review →500 W Switching Power Supply for Audio Amplifiers500 W Switching Power Supply for Audio Amplifiers2018Read review →
Power, W480500
Efficiency, %8491.6
Temperature rise, °C105146
Review conclusionWith reservationsWith reservations

Only in one review: Voltage 35 V (500 W Switching Power Supply for Audio Amplifiers); Current 40 A (PTA-600W-12V (500 W, 40 A)); Ripple 150 mV (PTA-600W-12V (500 W, 40 A)); No load 3.3 W (500 W Switching Power Supply for Audio Amplifiers).

PTA-600W-12V (500 W, 40 A): Ripple is low, but cooling problems limit sustained operation to roughly 30–32 A.

500 W Switching Power Supply for Audio Amplifiers: The power supply is well made and efficient, but overheats; it can deliver only 250–300 W continuously.

Figures were taken from the review text and checked against the quoted passages. Measurement conditions differ between reviews, so read the reviews yourself before buying. Prices at the time of review.

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