Amplifier switching power supply 300W three-way positive and negative 24V30V32V36V42V48V55V60V positive 12V - AliExpress.io

Product Description

300W power amplifier switching power supply Three-way Output

Output DC voltage, eliminating the need for rectifier filter circuit, higher efficiency and smaller internal resistance.

Type 1: +24V 6A, -24V 6A, +12V 1A

Type 2: +36V 4A, -36V 4A, +12V 1A

Type 3: +42V 3.5A, -42V 3.5A, +12V 1A

Type 4: +48V 3A, -48V 3A, +12V 1A

Type 5: +55V 2.7A, -55V 2.7A, +12V 1A

Type 6: +60V 2.5A, -60V 2.5A, +12V 1A

The main voltage of this power supply is positive and negative voltage output (optional), and the auxiliary voltage is a single group of positive 12V (with fan or speaker protection circuit).

Suitable for class A power amplifiers, class B power amplifiers, class AB power amplifiers, digital power amplifiers. In short, all power amplifier boards that require positive and negative dual voltage power supplies can be powered by this power supply (such as traditional discrete component power amplifiers, LM1875, LM3886 and other integrated circuit power amplifiers ), it should be noted that the voltage of the power supply is lower than the maximum allowable voltage of the power amplifier board.

The output of the power supply is the DC voltage, which can save the conventional loop rectifier and filter circuit, which not only has higher efficiency, lower heat generation, and much lower internal resistance of the power supply.

The filter capacitor of the power supply itself is sufficient for daily use, or you can add a filter capacitor board to increase the filter capacitance.

This power supply is specially designed for power amplifier circuit, the pure aluminum shell heat dissipation and shielding, ripple interference is very small.

Specifications

Dimensions: 127*82*38
Weight: 300g
Cooling method: natural cooling
Output ripple: less than 150mV
Total output power: 350W
Output voltage adjustment range: 10%
Incoming line stability: 0.5%
Load stability: 1%
Input voltage: 88~264VAC
Start, rise, hold time: 200ms, 50ms, 20ms input voltage 230VAC output full load
Pressure resistance: input-output 1.5KVAC; input-shell 1.5KVAC; output-shell: 500VAC
Insulation resistance: input-output, input-case 500VDC/100MOmega;
Working temperature and humidity: -20℃~60℃, 20%~90%RH Humidity without condensation
Storage temperature: -40℃~60℃
Protection function: over current, over power
Safety standards: GB4943, UL60950, EN60950

Packing List：

1* Switching power supply board

Output terminal: +36V, G, -36V respectively connected to the power amplifier board +, 0, -, three power supply terminals, +12V and G can be connected to a small fan to assist heat dissipation or speaker protection circuit, etc. (2 Gs are inside the power supply If you are connected, you can connect to either one or the other, or you can connect them together).

Input terminals: L and N are respectively connected to the live and neutral wires of the 220V plug, and FG can be connected to the shell or the ground wire.

Using pure aluminum heat sink and shell, there are 3 M3 fixing holes in the middle of the bottom, which can be fixed on the chassis or on a larger radiator.
There are also 2 M3 fixing holes on each of the two sides, and a radiator can also be installed or fixed on the side.

Dimensions (length * width * height): 127 mm * 82 mm * 38 mm

Pros & Cons

Pros

300W total rated power for reliable amplifier system support
Integrated rectifier filter circuitry, no need for external add-on parts
Multiple pre-configured voltage output options to fit different amplifier setups
High efficiency with low internal resistance for stable power delivery

Cons

No third-party safety certifications (like CE, UL) listed for the product
No physical size or weight specifications provided for the power supply unit
The product description cuts off before listing the full 60V output configuration
Only designed for DC amplifier systems, not compatible with AC-powered setups

Common Questions

What materials are used for this amplifier switching power supply?

The official product details do not list specific construction materials, but it is built with a high-efficiency switching circuit to minimize internal resistance.

What voltage output configurations are available for this power supply?

Three primary configured output sets are listed: 1) +24V 6A, -24V 6A, +12V 1A; 2) +36V 4A, -36V 4A, +12V 1A; 3) +42V 3.5A, -42V 3.5A, +12V 1A, with a partial fourth type noted up to 60V in the listing.

What devices is this switching power supply compatible with?

This 300W power supply is specifically designed for amplifier systems, providing dual high-voltage DC channels plus a single 12V auxiliary channel for additional components.

Do I need an external rectifier filter circuit when using this power supply?

No, this switching power supply integrates the necessary rectifier filter circuitry, eliminating the need for additional external components.

What are the shipping details for this amplifier power supply?

The product listing does not include specific shipping times or policies, so standard mainland China shipping terms apply unless otherwise noted.