Amp Mods

[linkstandalone] Amp Mods

This is a walk through of the modifications which I have made to my Breeze Audio mini amplifier. I have a Micca OriGain mini amplifier I use for my desktop computer setup, which works great. No noise, slick minimal design, perfect for my use case. I was looking for another mini amp to use in the other room to use with some bookshelf speakers, and there is a plethora of these TPA3116 amps floating around. I was able to purchase mine off eBay for $20! I figured it would be a fun project to see how much we could improve the sound quality of this cheap little amp, as well as personalize it a bit. Some of the mods I’ve done are probably overkill for this unit, but I figured why not, since I’m already in there working on it let’s make it as nice as possible. This is what mine looked like although they can come in a variety of anodized colors.

If you are looking for one of these to purchase they can be found on eBay, Amazon, and AliExpress under various additional brand names such as Nobsound and Fosi Audio. Usually the units do not include a power supply, so keep that in mind. You will need a 19-24v DC power supply (center positive) with around 3 to 5 amps. I would not spend more than $30 on one of these amps without a PSU. If you have an old laptop charger lying around these usually work great! Take a look around your local thrift shop for one.

The initial configuration of this amp has a few problems: * The TPA chip is configured for too much gain, which leads to a Poor noise floor * Inputting 21 volts, the output is rated for 50w at 10% distortion (yikes!) * Cheap Chinese clone Sanyo + Panasonic caps * Loose parts (Heatsink + Output Inductors)

Modding Time

Here is the overview of what we are going to do:

Put some nice fresh thermal compound on the chip to help out with the heat issues of this board since the heatsink is on the smaller side.

Parts Used

After

Thanks to FFcossag, NFM, and Adrian Black of YouTube