Bo Deadly
Well-known member
Here's a mini SMPS mic power supply that I just made:
So this is a Mean-Well APC-16-350 that you can get on Mouser for $7 USD with a custom PCB mounted on top. Overall dimensions are 90 mm x 40 mm x 53 mm.
It makes +18V, -18V and +48V. However, the 48V is relative to chassis ground which is connected to the negative output of the SMPS whereas the +-18 is relative to a simple virtual ground. But this is all that is necessary to bias a bipolar amp and differential line driver.
Here is the schem:
Preliminary tests with a simple THAT 1510 / THAT 1646 circuit seem good to me:
This plot is of a test tone attenuated 60dB and then amplified 60dB by the THAT 1510 circuit. The test tone peak is 0 dBFS which for my Motu Traveler is +12dBu.
Hopefully someone finds this useful.
At least it should prove without a doubt that SMPS are perfectly suited for pro-audio applications.
So this is a Mean-Well APC-16-350 that you can get on Mouser for $7 USD with a custom PCB mounted on top. Overall dimensions are 90 mm x 40 mm x 53 mm.
It makes +18V, -18V and +48V. However, the 48V is relative to chassis ground which is connected to the negative output of the SMPS whereas the +-18 is relative to a simple virtual ground. But this is all that is necessary to bias a bipolar amp and differential line driver.
Here is the schem:
Preliminary tests with a simple THAT 1510 / THAT 1646 circuit seem good to me:
This plot is of a test tone attenuated 60dB and then amplified 60dB by the THAT 1510 circuit. The test tone peak is 0 dBFS which for my Motu Traveler is +12dBu.
Hopefully someone finds this useful.
At least it should prove without a doubt that SMPS are perfectly suited for pro-audio applications.