DC 12V 30A 360W Universal Regulated Switching Power Supply Power Driver for 3D Printer, HAM Radio Transceiver, Car Subwoofer amp Audio Amplifier and RC LiPo Chargers

I wanted a power supply for some old car audio equipment (150w 5-ch class ab 30A input, component speakers, and subwoofer) I've been powering with a car battery/charger in my garage, and at the price of this I figured "why not?".Really straight forward connections with adjustable voltage potentiometer next to the terminal block. I set mine to 14.4v with a DMM, connected my 5-ch amp, and listened for audible noise. None. Turned the gains on the amp up, and still nothing. Alright let's "giver' the beans" to see what it can do. Full volume Slayer, Pink Floyd, Steely Dan, Primus. It is far better than the battery that delivered 12.6vdc as far as dynamic headroom, and I don't have to worry about voltage loss over time of use. Plus I can bring this system into the basement without having to worry about a battery off gassing hydrogen while it charges.So impressed that I'm going to buy at least 2 more so I can power my "big amp" (620w RMS 5-ch hybrid class ab/d 75A input)The fan is somewhat annoying so I'm going to build and enclosure to house it/them.There's no instructions. No power on/off switch either. They really aren't necessary unless you're working beyond your skill-set.As I stated, definitely worth the money, and I'm gonna get a couple more.*Edit*I have removed a star because of the fan noise. On startup it has become incredibly noisy. So much so that while waiting for it to warm up it's impossible to not hear it in the background for a couple minutes unless the volume is turned up loud enough to be a nuisance inside the house. Curious if it will run with the fan disconnected and use larger (better) fan in the secondary enclosure.

Added this to my entertainment center to run 12volt LED lighting. Had heard some complaints of fan noise but mine is fairly quiet. I did notice the fan is variable speed. When more load is added the fan speeds up. My total load is only .5 amp at 12volts and when I added another 1.75 amp load = 2.25 amps the fan speed doubled but was still quiet enough i couldn't hear it 15 feet from my chair while watching TV. I do have a full 7.1 surround sound system so that probably helps me not hear the fan. I still don't think it is very loud though.I like it and it works great I have about 30 hrs of run time on power supply at 2.25 amps at 1 12volt circuit so I'm not stressing the unit at all when 30 amps is the max rating. Nice power supply for what I use it for and plan on adding 2 more amp load to it soon.Update; 10-14-2020Still working great, I added 1 more amp to the load so I'm at 3.1 amps now so 10% of max load and the fan is louder now. I have to relocate the power supply to a isolated spot so I can't hear it now. Yep the fan is getting to loud at 10% of max rated load.

Power supply worked like a top. but the fan was very loud and drove me nuts.

I use this to power several lithium polymer battery chargers (used for R/C flight), one of which is a four station device that can draw up to 16.8 amps, the others are limited to 6 amps each but the total load could be theoretical 28.8 amps although my usage would never approach that. Voltage remains very stable during charging where I'm drawing right around 10 amps and the fan works extremely well, coming on occasionally to cool the insides down. Plenty of ventilation around the case and you could put some standoff screws on the bottom to set it up off the work surface slightly (I didn't bother).Users should understand electricity and that they need to take steps to provide adequate protection - like shrink wrapping your connections right up to the board, making sure the provided cover is always in the down position and that you do not exceed the load limits of the unit. Actually, not exceeding 75% of the stated limit is a good idea, providing some margin of safety.Time will tell if this unit holds up but if it does, it's an inelegant but very inexpensive solution to the converter problem. You can buy name brand converters with on/off switches, shielded plugs, meters and fancy cases but in the end, they all do the same thing - change 110AC to ~12V DC. This one seems to do it very cleanly without any variance in the output. I'm not sure I'd hook it up to a $1,000 worth of HAM radio equipment but for my $100 chargers, it's just fine.

Very noisy, no power switch or auto shut off, so it runs constantly. Also does NOT come with a power cable. Must buy separately.