DIY Hi-Fi Audio PCBs: Amplifiers, Preamps & USB Filters
Time to build better sound. Time to build audio with a better look.
All PCBs are available in a black semi-matte finish.
Re-Organised PCB
Reverse engineering allowed a better layout and smarter component placement for improved performance and signal flow.
Calculated Traces
Every trace was intentionally calculated: with wider paths for power, narrower for signals, ensuring optimal current flow and low noise.
Well Tested
Each DIY audio PCB has been hand‑soldered and tested in real-world amplifier builds to guarantee reliable, clean audio performance.
Really Good Amp. Seriously.
This is the DIY audio amplifier you’ve been looking for: featuring the powerful LJM L12-2, now on a clean, optimised, and fully redesigned board.
The improvements go deep. Traces have been re-routed with proper layer crossing. No more long horizontal overlaps. Signal paths now cross at right angles to minimise interference.
It’s no longer just LJM L12-2. It’s MA 12-2.
The goal of the Milan Audio project is to deliver the best possible solutions for audio enthusiasts, from USB DACs and preamps to hi-fi power amplifiers. All PCBs were originally designed for personal use, created to meet the high standards of the designer himself.
Audio Amplifiers
Explore a few PCB versions you might be interested in.
Audio PreAmps
Bring low signals to life with clean, proper gain control.
USB Audio Filter
Designed to improve audio by filtering interference from USB power.
Understanding to amplifier
Have a look at MA 12-2 circuit diagram
Yes, every DIY audio amplifier can be modified endlessly. But this MA 12-2 is already improved. This is the end of endless fiddling and research. It’s time to assemble, power up, and enjoy your audio.