SKU:U055-B


















Hat SPK2 is an I2S speaker expansion module for Stick series controllers with a compatible HAT interface, featuring a MAX98357A I2S digital audio amplifier and a 1W mono speaker. It receives digital audio from the host over I2S for playback. Powered from the host 3V3 pin, the module supports 16-, 24-, or 32-bit audio data and sample rates from 8kHz to 96kHz. Built-in short-circuit and thermal protection make it suitable for voice prompts and sound effects.
| Specification | Parameter |
|---|---|
| Amplifier IC | MAX98357A |
| Speaker Rated Power | 1W |
| Audio Bit Depth | 16 / 24 / 32 bits |
| Supply Voltage | 3.3V from the host 3V3 pin |
| Operating Temperature | 0 ~ 40°C |
| Sampling Rate | 8kHz ~ 96kHz |
| Audio Interface | I2S |
| Product Size | 24.0 x 18.6 x 13.7mm |
| Product Weight | 4.6g |
| Package Size | 136.0 x 92.0 x 13.0mm |
| Gross Weight | 8.1g |


| Product Comparison Table | Hat SPK2 ![]() | Hat SPK ![]() |
|---|---|---|
| SKU | U055-B | U055 |
| Amplifier IC | MAX98357A | PAM8303 |
| Audio Input | I2S digital audio | Analog audio |
| Output Channels | Mono | Mono |
| Supply Voltage | 3.3V from host 3V3 pin | 5V from host 5VOUT pin |
| Sampling Rate | 8kHz ~ 96kHz | Not applicable (analog input) |
| Audio Bit Depth | 16 / 24 / 32 bits | Not applicable |