6 Mar
2017
6 Mar
'17
11:52 a.m.
On 06/03/17 10:11, Ralf Mardorf wrote:
On Mon, 6 Mar 2017 09:58:41 +0100, Dominique Michel
wrote:
> You must have 1 connection to the ground, and all the equipments must
> be connected to it.
>
> Instead of following you wiring hints, the OP should follow my hint
> to connect the computer and amp to the same main socket by a multiple
> socket, ensuring that the main cables and audio cables are 100% ok.
> _______________________________________________
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> Linux-audio-user(a)lists.linuxaudio.org
> http://lists.linuxaudio.org/listinfo/linux-audio-user
Not strictly Linux Audio:
I've had problems with ground loops in our
church PA system.
We have a mixture of speakers, two powered Mackies, which use XLR cables
direct from
the mixer (Soundcraft Ui16), and four passive speakers which are driven
by a cheap
100+100W amp. The latter has a nasty cooling fan which makes enough
noise to be distracting
so we put it in an adjacent room, and fed both channels via a single
unbalanced audio cable.
That amp is powered by from a mains socket in the adjacent room and we
had very significant
mains hum with it until I interposed an audio transformer. Thus no
direct ground connection
between the amp and the rest of the kit.
Bill
--
+----------------------------------------+
| Bill Purvis |
| email: bill(a)billp.org |
+----------------------------------------+