pHat-Beat technical question


#1

what values of speaker impedance can be used with the pHat-Beat?

Thanks
Andrew


#2

I believe as low as 4 ohms, according to this, https://learn.adafruit.com/adafruit-max98357-i2s-class-d-mono-amp/overview It’s the same chip Pimoroni are using.
•dual I2S DAC/amplifiers for stereo audio (MAX98357A) https://shop.pimoroni.com/products/phat-beat
The speaker pHat ( has the same chip) uses an 8 ohm speaker. I have 8 ohm speakers on my pHat Beat.


#3

after looking at the Adafruit page, if you increase the speaker impedance you decrease the power

Output Power: 3.2W at 4Ω, 1.8W at 8Ω,


#4

For what its worth, mine are plenty loud enough for me. I hardly ever have the volume up loud enough to lite up 3 LED’s on the VU meter. I’m pretty sure but not positive, my speakers are 8 ohms. I’d have to take one of the enclosures apart to confirm. Its some repurposed speakers from a Logitech R20 speaker set. The Amp part died on me after many years service.