Build a 4-Channel Studio-Grade Audio Mixer with Arduino Mega and MAX9814 Microphones

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

If you've ever wanted to record multi‑mic podcasts, stream live jam sessions, or create a portable PA for small gigs, building your own mixer is the ultimate maker challenge. This kit combines four high‑sensitivity MAX9814 microphone channels, a precision TL074 op‑amp summing stage, and a PAM8403 speaker amplifier — all orchestrated by an Arduino Mega that drives a real‑time OLED level display. The final assembly is a road‑ready mixer you can tweak, expand, and truly own, without relying on mass‑produced consoles that hide their circuits behind sealed panels.

What You'll Build

You’ll assemble and calibrate a fully functional 4‑channel analog mixing desk with individual gain controls per channel, master output to dual 3W speakers, and a 0.96‑inch OLED that visualizes audio peaks or menu settings. The mixer accepts any standard 3.5mm electret microphone via the MAX9814 breakouts and can be housed in the included sturdy enclosure, ready for a desktop podcast corner, a college audio lab, or a maker‑driven live setup.

What You'll Learn

• Designing a low‑noise analog mix bus using dual TL074 quad op‑amps
• Implementing individual channel gain staging with 10kΩ potentiometers and proper decoupling
• Interfacing an Arduino Mega with an OLED display to show dynamic VU meters
• Soldering high‑quality audio connections on PCB prototype boards for robust signal integrity

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This advanced kit speaks directly to audio tinkerers who understand signal flow but want to break free from black‑box mixers. It’s ideal for B.Tech ECE and EEE students fabricating a mixer for Smart India Hackathon projects, podcasters in India who need a custom desk with programmable features, and ATL Tinkering Lab mentors demonstrating analog electronics through a tangible, high‑fidelity outcome. If you’ve built a few Arduino projects and are ready to master audio circuitry, this kit bridges the gap.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.

Choose your assembly option:

• Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
• Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.