AIYIMA DC48V 10A GaN Power Supply Adapter for TPA3255 Stereo Class D Amplifier A07 & A07 MAX & A08 PRO & A70

Purchased to upgrade my Fosi 48 volt 5 amp power supply. Based on price and upgraded design this 10amp power supply brings out more power, dynamics, clarity. No noticeable hum or noise! Live in an area with a lot of cell towers and high power line. Absolutely no problems. For me it’s a great buy and does exactly what Fosi said theirs would do! Can not compare the to different power supplies as I didn’t have two Fosi power supplies. Fosi states that it up rated power supplies can increase power safely as the chip can handle 53 volts 12 amperage with and increase in power with increased need for ventilation. Yes, my amps run hotter so placement should be watched.A small inexpensive computer fan has been used on some of the reviewers will good results. I love the Fosi products. If you want to really hear and feel the increased power do the upgrade. You I’ll need two power supplies for the Fosi V3 Monoblock amplifiers.The manufacturer uses the same chip TI 3355 using the same voltage and amperage as well as adapter in their amplifiers.

work very well. quality build

I bought this for an amplifier which came with a power supply but the maker stated that the amp would not put out its full potential watts unless you bought this larger power supply. I get it but when I use the larger power supply I can't tell any difference at preset volumes. I probably need to use a more scientific approach but I'm not that motivated.

Bought it in order to get the maximum from my Aiyima A07 PRO but it did NOT work.Generates a big Humm sound that can not be missed and also does not play any music when the input is provided.Had to switch back to the original power supply and return the big brick back.Do not waste your money and time.

Very high quality, 10amp makes a big difference over the 5 amp version for bookshelf speakers. More Power!

Replaced the standard 36v 5A with this power supply. Huge difference in clarity and sound. Go for it, you won’t regret it.Update 12/2024 - connected the A08 Pro with the 48V 10A power supply to a pair of Elac UF5 4-OHM floor speakers which need a lot of power; Sounds so sweet!(Previously tried to connect the Elacs to an HTA-200 tube amp, sounded great but it ran too hot)

Connected to the Aiyima V70 as an upgrade. The amplifier is connected with balanced inputs, however when I switched the original power supply with this one, suddenly the completely silent background was replaced with a whooshing sound. After some experimentation, I found that there is a significant ground current that is generated in the ground wire, and that creates a ground loop with the rest of the system, injecting this high frequency noise in a way that is impossible for the balanced inputs to cancel out.I am a practicing electrical engineer, and ground currents from switching power supplies are nothing new (I use a 500W Mean Well power supply for a project at work, and it puts 5mA into the ground wire !) but this bothers me for an audio application, especially when the original brick is so well done.I also noticed that if I lift the ground, the noise is completely gone, but I am not willing to have a powerful unit like this one floating without a solid ground. I measure 260mV rms on the ground of the DC connector with the scope connected to the same AC circuit and the same ground. That is Ok for safety, but not OK for audio.Has anyone else noticed this problem ? if I return it, will I get another unit that has the same issue ?I haven't returned it yet, but I am thinking about it.Update: seller reached out and offered a refund. I have not accepted it yet, since I wanted to try to fix the problem myself. I bought a 6 inch 15A extension cord and spliced in 2 6A / 1000V diodes back to back into the ground line. These diodes allow 0.6V before they start conducting, so under normal conditions they are off and the unit is floating. If any fault happens, then they start conducting and drain the current away.Works like a charm !!! the noise is gone. I added 1 star to my review because of the refund offer.

I'm using this with a class D amplifier and it is giving a very clean signal. No errors or issues so far!