Differential voltage vs single rail? I have no idea.

[Pygmy]

I'm looking for a 300W power supply to power my Sure class D amp (AA-AB35281).
Connex has the SMPS300RS and the SMPS300RE, one is differential and the other "single rail".

I have no idea what this means / how it applies to my setup, so I don't know which one to choose.

Can somebody point me in the right direction?

 

[Mark Tillotson]

Then point us at the datasheet or product page for the precise amp you have.

 

[indianajo]

If your amp DC power input screw strip has "+" and "-" it is single ended. If it has "+", "-" and a downward pointing arrow in between, it needs a split supply, which could be called "differential", if you didn't speak english.
BTW connex sells different voltages of power supply in each wattage range. You had better be very sure of the voltages your amp board requires before you purchase a supply. If the amp requires +-50 v or something, that is a split supply. That reads as "plus and minus fifty volts".
If your vendor didn't tell you what voltages your board requires, find a better vendor.

 

[Pygmy]

Then point us at the datasheet or product page for the precise amp you have.

It's this one:

Sure Electronics AA-AB35281 3x200W Class D Audio Amplifier Board - T-Amp


These are the supplied specs:
https://www.parts-express.com/pedoc...200w-fanless-audio-amplifier-board-manual.pdf

Am I right in assuming this will need a single-ended power supply?

 

[FauxFrench]

You need a single rail supply. 24-36Vdc. 36Vdc for highest output power.

 

[Mark Tillotson]

You read the spec sheet? It shows the power terminals, there are two wires to the power supply, not three, so its single rail.

 

[Pygmy]

As mentioned in my original post, I had no idea what "differential" and "single rail" meant... 🙂

I think I have an idea now of what it means.
Cheers for helping me understand! 🙂

 

[MAAC0]

Single +V & Ground or -V & Ground.. can also be expressed by -V & +V
Differential -V +V & Ground