JustBoom Amp HAT
DEV-14318
The JustBoom Amp HAT is a high-quality audio amplifier designed specifically for the Raspberry Pi.
Digital-to-analog conversion is also included with the Amp HAT, so no external sound cards or DACs
are required. Simply stack the plug-and-play add-on board (HAT) onto your Raspberry Pi A+, B+, 2B
or the new 3B, and it will be ready to use immediately.
JustBoom designed the Amp HAT to be simple to install and use. With no soldering required and all
the mounting hardware already provided, this product is suitable for both beginners and seasoned
professionals alike. Just connect your Amp HAT to a set of passive speakers, and you can be up
and running quickly, enjoying flawless, high-quality audio playback within minutes. Also included is
an optional IR receiver to allow remote control operation of your Raspberry Pi Amplifier.
Featuring a Class-D power amplifier chip with built-in 192kHz/32-bit DAC, for a peak power output of
2 x 55 watts, the JustBoom Amp HAT outputs audio over two speaker cable connector blocks that
accept anything up to 14 AWG cable and will provide crystal-clear audio to either 4 or 8 ohm passive
speakers. The Amp HAT uses the I
2
S interface for its audio input, which reduces CPU load on the
Raspberry Pi compared with USB solutions. It is also designed to back-power the Raspberry Pi over
the 40-pin GPIO header, meaning you only need a single power supply for the entire system.
Note: To power this HAT you will need to pick up the
Global Power Supply
or possess one capable
of powering the HAT.
Features
Full high-quality audio — 192kHz / 32-bit
2 x 55 watt peak output at 8 ohms (2 x 30 watt RMS)
Includes both a DAC and power amplifier — just connect to your passive speakers
Back-powers the Raspberry Pi over the GPIO (with full HAT-compliant protection) at 2.5A, so only
one power supply is required for the whole system.
Plug-and-play compatibility for ease of use
Hardware and software volume control from your Raspberry Pi
Onboard hardware jumpers for configuring mute and gain settings (jumpers could optionally be
changed with switches)
Mute/enable with GPIO22 (this can be overridden by using jumper J4)
No soldering required
Optional IR receiver included in package
Unused GPIO pins still accessible via unpopulated extension header
Full driver support in Raspbian / NOOBS
Compatible with OSMC / Max2Play /RuneAudio / Volumio / Moode / PiCorePlayer / PiMusicBox /
OpenELEC and others
https://www.sparkfun.com/products/14318 9‐18‐17
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