On Sun, 24 Jan 2021 17:37:27 -0800 (PST), in gmane.comp.hardware.beagleboard.user Steve Meinschein <[email protected]> wrote:
> >https://www.amazon.com/gp/product/B00IRVQ0F8/ref=ppx_yo_dt_b_asin_title_o09_s01?ie=UTF8&psc=1 > At best, this device has /headphone/ level output (and likely aimed at in-ear buds, not around-the-ear cups), at worst it could be line-level output. (Input could be microphone or line-level) >and here is a link to the mini-speaker. > >https://www.adafruit.com/product/1890?gclid=CjwKCAiAlNf-BRB_EiwA2osbxVKKNeMPMA_9rEXRKPnz9IsqDNvQx1z-Oz6XTPvXRog8NjRMjgmNchoC_ZQQAvD_BwE > Bare board speaker -- no amplifier stage. Headphone jacks typically only provide about 10mW (give or take). Headphones are spec'd using a 1mW signal. Normal speakers are spec'd using a 1W! signal (most of these headphones are also high-impedance devices -- 32Ohm is common). An 8Ohm speaker is going to suck up the power, and requires much higher power to produce "equivalent" sound levels. Oh, and a second thought -- that's a stereo adapter, but the speaker is mono... How are you wiring the adapter to the speaker? Suggest you consider something like https://www.adafruit.com/product/987 (and add a second matching speaker for the stereo -- and do NOT set level to 100%; your speaker can only handle 1/8th of the full power*) * audio is tricky. As I recall, for 3.7W max, reducing perceived volume to half means 0.37W, which is in range for your speaker. Quarter perceived volume is 0.037W, 1/8th perceived volume is 0.0037 -- Dennis L Bieber -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/oaut0g533ffgquc14ntgdmun1kre0c2ikc%404ax.com.
