SKU: TH1983
If you want “real” speaker volume without the size, heat, and battery drain of older analog amps, the MAX98306 is a solid upgrade. This miniature stereo Class-D amplifier can deliver up to 2 × 3.7W into 3Ω speakers (at 5V), while staying highly efficient—ideal for handheld gadgets, embedded audio, and compact enclosures.
Sold Out!
We will notify you when this item is back in stock. Please enter your email or mobile number.
If you want “real” speaker volume without the size, heat, and battery drain of older analog amps, the MAX98306 is a solid upgrade. This miniature stereo Class-D amplifier can deliver up to 2 × 3.7W into 3Ω speakers (at 5V), while staying highly efficient—ideal for handheld gadgets, embedded audio, and compact enclosures.
Inputs are capacitor-coupled with 1.0µF caps and support differential signaling; for single-ended sources, simply tie L− and R− to GND. Outputs are Bridge-Tied Load (BTL), meaning the speaker terminals are not connected to ground and the amp is meant to drive speakers directly (not another amplifier input).
The board also includes a gain-select jumper (and breakout pins) to choose from 5 gain levels (6–18 dB), plus built-in thermal and over-current protection for robust everyday use.
Technical details for MAX98306 Stereo 3.7W Class D Audio Amplifier Board.
| Specification | Details |
|---|---|
| Amplifier Type | Stereo Class-D |
| Amplifier IC | MAX98306 |
| Input Voltage | 2.7V to 5.5V DC |
| Output Power (5V Supply) | 2 × 3.7W @ 3Ω, 10% THD; 2 × 1.7W @ 8Ω, 10% THD |
| Speaker Impedance | 3Ω or higher |
| Outputs | BTL (Bridge-Tied Load), speaker outputs not referenced to GND |
| Input Coupling | 1.0µF capacitors (differential-capable) |
| Gain Settings | 6dB, 9dB, 12dB, 15dB, 18dB (jumper or G/G’ pins) |
| Efficiency | >90% (typical use case) |
| Quiescent Current | ~2mA |
| Shutdown Current | ~10µA |
| Protection | Thermal + short-circuit / over-current protection |
| Noise/Artifacts | Click-and-pop suppression |
| PSRR | 83dB @ 217Hz |
| EMI Controls | Spread-spectrum modulation + active emissions limiting |
| Included Hardware | Assembled board, breadboard header, pre-soldered 3.5mm screw terminals, pre-soldered 2×4 header, gain jumper |
| Speakers Included | No |
Pinout guide for Adafruit MAX98306 Stereo 3.7W Class D Audio Amplifier Board.
| Pin / Label | Description |
|---|---|
| VDD | Power input: +2.7V to +5.5V DC |
| GND | Ground (0V) |
| R+ | Right audio input (+). For single-ended sources, connect to Right signal. |
| R- | Right audio input (−). For single-ended sources, tie to GND. For differential sources, connect to Right (−). |
| L+ | Left audio input (+). For single-ended sources, connect to Left signal. |
| L- | Left audio input (−). For single-ended sources, tie to GND. For differential sources, connect to Left (−). |
| ROUT+ | Right speaker output (+). Connect to Right speaker + terminal (BTL output — not GND). |
| ROUT- | Right speaker output (−). Connect to Right speaker − terminal (BTL output — not GND). |
| LOUT+ | Left speaker output (+). Connect to Left speaker + terminal (BTL output — not GND). |
| LOUT- | Left speaker output (−). Connect to Left speaker − terminal (BTL output — not GND). |
| GAIN (4×2 header + jumper) |
Select amplifier gain by placing the jumper on one of the 4 marked positions: 9dB / 12dB / 15dB / 18dB. |
| Important BTL Note | Do not connect any speaker output to GND. Do not connect ROUT to LOUT (do not bridge channels). Use speakers of 3Ω or higher. |
Average rating
Based on 0 reviews
No reviews match this filter yet.
