[sdiy] Transporting line level audio in home / buzz-free USB wall warts?

Mike Bryant mbryant at futurehorizons.com
Tue Jul 18 13:35:07 CEST 2023

You could try the Raspberry Pi4 USB-C PSU.  Lot less crap on it than most.

From: Synth-diy <synth-diy-bounces at synth-diy.org> on behalf of cheater cheater via Synth-diy <synth-diy at synth-diy.org>
Sent: 18 July 2023 11:48
To: synth-diy <synth-diy at synth-diy.org>
Subject: [sdiy] Transporting line level audio in home / buzz-free USB wall warts?

Hey all, I wanted to move audio from my media pc to rooms in my home
and I was wondering if anyone had suggestions on an inexpensive piece
of gear that'll do that. I just want to listen to podcasts and some
music while i'm doing stuff around the house, nothing high quality,
but I'd prefer not to have hum and static and strong high freq
rolloff. I'd prefer to do this in analog so that I can turn on
multiple speakers and they're in phase. I'll be moving the audio over
a distance of ~ 10-15 meters to 4 different zones. In the target rooms
I'm going to hook up inexpensive bluetooth speakers with aux input
running off of a usb wall wart.

Also looking for inexpensive European (Schuko-style) USB wall warts
that don't have a lot of ripple. I have tried a bunch (~10?) of
different usb power supplies over the years and almost all of them
make the speakers buzz audibly. The only one that I have that doesn't
do that is an ancient Samsung one that I got with I think my Galaxy
S3. I hope it never dies to be honest.

Obviously a better power supply circuit in the bluetooth speakers
would make them not buzz, but I tried two different ones (starting
with Anker Soundcore 2 and most recently Earfun UBoom L) and they all
do that so... it is what it is.

Best regards
Synth-diy mailing list
Synth-diy at synth-diy.org
Selling or trading? Use marketplace at synth-diy.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20230718/51653716/attachment.htm>

More information about the Synth-diy mailing list