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Amplified HiFi sound card for Raspberry-Pi
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The HiFiBerry Amp2 is a high-quality and highly efficient Class-D power amplifier for the Raspberry Pi. The board is plugged directly on the 40 pin GPIO connector of the Raspberry-Pi. Mounted onto the Raspberry Pi, the HiFiBerry Amp 2 creates a powerful stereo audio system.
The speakers are connected directly on the Amp board. Amp 2 is an ideal module for:
The output power that you can expect from the AMP 2 depends on various criteria and also from your audio quality expectation.
As former conclusion: using a 24V power supply with 4 Ohms speaker will develop the highests output power par channel.
The expected audio quality is also very important! For a same speaker (say 4 Ohms) and same input voltage (say 18V) you can expect 2 distincts output power. Either 18W or either 30W par channel. The difference between them is the audio quality (sound distortion). At 18W you will have a THD+N < 0.1%, so a very high quality sound. When pushing the volume, you can reach the max. output power (30w per channel). However, at such a power, audiophile will notice a sound quality decrease (the will increase to THD+N < 10%)
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