Datasheet Amp4 Pro

Overview

The HiFiBerry Amp4 Pro is a DAC/amplifier combination for all Raspberry Pi models featuring a 40-pin GPIO header.

Facts

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.

Hardware and speaker connectors

L/R outputs can’t be bridged!

Note that the actual board might look a bit different. Layout and components might change without further notice. We do not guarantee a specific PCB layout or specific components.

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

The Amp4 will power the Raspberry Pi. It is powerful enough for any Pi up to the Pi4B. Note that additional hardware drawing lots of power (e.g. hard disks, displays) might require an external power supply.