The HiFiBerry Amp4 Pro is an advanced version of the standard Amp4 DAC/amplifier for Raspberry Pi, with integrated dual-domain clocks for optimal audio clock generation.

Mount it onto the Raspberry Pi and you have a stereo audio system - you only have to connect your loudspeakers. It provides up to 60W power and you only need a single 12-24V power supply to power the Raspberry Pi and the Amp4 Pro Board.

With 4-Ohm speakers, we recommend 12-20V. Higher operating voltages are only recommended with 8-ohm speakers. However, even with 8 Ohm speakers a 20V power supply is the best choice in our opinion.

The board powers the Raspberry Pi, there is no need to add an external 5V power supply to the Raspberry Pi.

The Amp4 Pro is designed to work with all speakers or 4-8 Ohm impedance. It supports sample rates from 44.1-192kHz (16-32bit). It can be equipped with the DSP add-on board to enable advanced digital signal processing capabilities.

The Amp4 Pro integrated voltage converter is powerful enough to power even the new Raspberry Pi 5. Due to the improved voltage regulator, it’s possible to power the official 7″ Raspberry Pi touchscreen display or other additional 5V devices.

Note - L/R outputs can’t be bridged!

Features

• Compatible with all 40-pin models of Raspberry Pi, including Raspberry Pi 5
• Stereo DAC with sample rates up to 192kHz/24bit
• Dual domain clock circuit for optimal audio clock generation
• Up to 2x30W output power output
• Uses a single external power supply 12-24V (see below) to power the amplifier and the Raspberry Pi
• 5V power supply up to 5A
• No soldering, comes as a pre-fabricated kit, just plug it onto the Raspberry Pi.
• Can be extended with the HiFiBerry DSP add-on
• Comes with all components required to mount it.
• EAN: 4260439551085

Specifications

Recommended operating voltage	12-24V
Absolute maximum operating voltage	24V
Maximum output power	60W
THD+N	<0.02%	typical, output power 0.1-10W
SNR	104db	typical
Frequency response	20-20000Hz	Output filter characteristics depending on specific speaker parameters
Typical output power per channel	14W	Vsupply=12V, Rspk = 4Ohm, THD+N <0.1%
	18W	Vsupply=18V, Rspk = 4Ohm, THD+N <0.1%
	20W	Vsupply=24V, Rspk = 4Ohm, THD+N <0.1%
	8W	Vsupply=12V, Rspk = 8Ohm, THD+N <0.1%
	17W	Vsupply=18V, Rspk = 8Ohm, THD+N <0.1%
	28W	Vsupply=24V, Rspk = 8Ohm, THD+N <0.1%
Maximum output power per channel	15W	Vsupply=12V, Rspk = 4Ohm, THD+N <10%
	30W	Vsupply=18V, Rspk = 4Ohm, THD+N <10%
	44W	Vsupply=24V, Rspk = 4Ohm, THD+N <10%
	10W	Vsupply=12V, Rspk = 8Ohm, THD+N <10%
	20W	Vsupply=18V, Rspk = 8Ohm, THD+N <10%
	38W	Vsupply=24V, Rspk = 8Ohm, THD+N <10%
Sample rates	44.1-192kHz

Resources

• HiFiBerry documentation page
  • GPIO Usage
• Amp4 Pro Datasheet
• 3D model (step)
• Config.txt configuration: dtoverlay=hifiberry-amp4pro

Package Contents

• 1x HiFiBerry Amp4 Pro
• 1x Mounting fixing pack