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| − | {{ Part
| + | #REDIRECT [[HiFiBerry Amp2]] |
| − | | modality = Audio
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| − | | manufacturer = HiFiBerry
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| − | | interface = HAT
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| − | | link = https://www.hifiberry.com/shop/boards/hifiberry-amp2/
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| − | | datasheet = https://www.hifiberry.com/docs/data-sheets/datasheet-amp2/
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| − | }}
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| − | | |
| − | The HiFiBerry Amp 2 is an integrated amplifier and sound card capable of playing audio at 24 bits/192kHz. The Amp 2 is a HAT peripheral that mounts on top of the Raspberry Pi, uses the [[Uses Protocol::I2C]] protocol, and powers the Pi through its 5V rail.
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| − | == Configuration ==
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| − | | |
| − | In '''/boot/config.txt''', remove or comment out the following to disable the built-in audio<ref>https://www.hifiberry.com/docs/software/configuring-linux-3-18-x/</ref>:
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| − | | |
| − | <pre>dtparam=audio=on<pre>
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| − | | |
| − | And add the line:
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| − | | |
| − | <pre>dtoverlay=hifiberry-dacplus</pre>
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| − | | |
| − | == GPIO Usage ==
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| − | | |
| − | The following pins are reserved and can't be used for other purposes<ref>https://www.hifiberry.com/docs/hardware/gpio-usage-of-hifiberry-boards/</ref>:
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| − | | |
| − | {| class="wikitable"
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| − | ! Board Pins !! BCM # !! Use
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| − | |-
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| − | | 3, 5 || 2, 3 || I2C Configuration
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| − | |-
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| − | | 12, 35, 38, 40 || 18-21 || Sound interface
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| − | |-
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| − | | 7 || 4 || Mute -- pulling low mutes (so pull it up!)
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| − | |}
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| − | | |
| − | == Specs ==
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| − | | |
| − | Recommend powering with an 18V power supply!
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| − | | |
| − | {| class="wikitable"
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| − | |Recommended operating voltage || 12-20V ||
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| − | |-
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| − | |Absolute maximum operating voltage||24V||
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| − | |-
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| − | |Maximum output power||60W||
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| − | |-
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| − | |THD+N||<0.02%||typical, output power 0.1-10W
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| − | |-
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| − | |SNR||104db||typical
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| − | |-
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| − | |Frequency response||20-20000Hz||output filter characteristics depending on specific speaker parameters
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| − | |-
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| − | |Typical output power per channel||14W||Vsupply=12V, Rspk = 4Ohm, THD+N <0.1%
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| − | |-
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| − | |||18W||Vsupply=18V, Rspk = 4Ohm, THD+N <0.1%
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| − | |-
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| − | |||20W||Vsupply=24V, Rspk = 4Ohm, THD+N <0.1%
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| − | |-
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| − | |||8W||Vsupply=12V, Rspk = 8Ohm, THD+N <0.1%
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| − | |-
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| − | |||17W||Vsupply=18V, Rspk = 8Ohm, THD+N <0.1%
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| − | |-
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| − | |||28W||Vsupply=24V, Rspk = 8Ohm, THD+N <0.1%
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| − | |-
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| − | |Maximum output power per channel||15W||Vsupply=12V, Rspk = 4Ohm, THD+N <10%
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| − | |-
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| − | |||30W||Vsupply=18V, Rspk = 4Ohm, THD+N <10%
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| − | |-
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| − | |||44W||Vsupply=24V, Rspk = 4Ohm, THD+N <10%
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| − | |-
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| − | |||10W||Vsupply=12V, Rspk = 8Ohm, THD+N <10%
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| − | |-
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| − | |||20W||Vsupply=18V, Rspk = 8Ohm, THD+N <10%
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| − | |-
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| − | |||38W||Vsupply=24V, Rspk = 8Ohm, THD+N <10%
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| − | |-
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| − | |Sample rates||44.1-192kHz||
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| − | |}
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