Every amplifier project starts with a suitable power supply. Audio Products PSP04, PSP02 and PSP01 modules bring rectification and reservoir capacitance together on a practical board for your transformer-based design.
Choose the reservoir bank and voltage version that fit your build, or select the PSP04 when you also need an auxiliary low-voltage output. PCB-only and assembled options let you decide how much of the project to build yourself.
Main amplifier rails plus an auxiliary low-voltage output — a practical starting point when your project also needs control or low-voltage circuitry.
Build a transformer-based amplifier supply around an eight-capacitor reservoir module. Choose the 63 V or 100 V version to suit your design.
A twelve-capacitor module with 63 V and 100 V options. The 63 V version provides a larger reservoir bank than the corresponding PSP02 version.
Build your amplifier supply around a rectifier and reservoir module that suits your project. Compare the three options below, then choose your transformer and module version to match the amplifier.
| Module | What distinguishes it | Versions and selection |
|---|---|---|
| PSP04 | Main dual rails up to ±50 V, plus an auxiliary output listed as ±15 V / 0.5 A. A useful option when a project also needs low-voltage circuitry. | PCB-only or assembled module. Listed maximum transformer secondary: 2 × 33 V AC. |
| PSP02 | Eight reservoir capacitors. The 63 V version uses 8 × 10,000 µF. | PCB-only, 63 V or 100 V module. Listed transformer limits: 2 × 42 V AC or 2 × 65 V AC respectively. |
| PSP01 | Twelve reservoir capacitors. The 63 V version uses 12 × 10,000 µF, giving a larger reservoir bank than PSP02. | PCB-only, 63 V or 100 V module. Listed transformer limits: 2 × 42 V AC or 2 × 65 V AC respectively. |
Share your amplifier model, required rail voltages, loudspeaker load and number of channels. We can help you select a suitable PSP module and plan the supply around it.
The listed boards share a 145 × 122 mm PCB format, TO-220 rectifier diodes with individual heatsinks and Faston connections. Check the selected version and its documentation before ordering.
Check the chosen module’s continuous-current and capacitor ripple-current ratings separately. Confirm the exact version and its suitability for your amplifier before selecting the transformer.
A conventional unregulated supply uses a transformer, rectifier and reservoir capacitors. Its rails vary with mains voltage and load. A switch-mode supply can be compact and efficient, but must also meet the amplifier’s noise, transient and protection requirements. Choose by compatibility and measured performance.
Reservoir capacitors reduce low-frequency rail variation and support changing current demand. Capacitance, ripple-current rating, ESR and temperature rating are separate parameters. Capacitor ripple current is not the same as the continuous DC current available to the amplifier.
Rectifiers need appropriate thermal design. Transformer and capacitor charging currents also affect start-up; larger banks may require inrush-current control. Evaluate these features as part of the complete supply.
For design background, see Texas Instruments AN-1849: An Audio Amplifier Power Supply Design.
Allow space for the transformer, module, wiring and cooling. Use the module’s connection diagram and plan grounding, fusing and protection for the finished amplifier.
These are integration modules for equipment builders. Mains wiring and charged reservoir capacitors require competent handling, a suitable enclosure and a verified discharge arrangement.
For the HE-series capacitors mentioned in the product documentation, consult the official Samwha HE-series datasheet. Check the actual fitted parts and revision of the module you receive.
Need help choosing? Contact Audio Products with the amplifier model, required rail voltages, loudspeaker load and number of channels.