[LAU] Hum pickup in DI boxes

[David W. Jones]

On June 8, 2021 9:11:56 AM HST, Will Godfrey <willgodfrey at musically.me.uk> wrote:
> On Tue, 8 Jun 2021 13:52:59 -0500
> "Chris Caudle" <6807.chris at pop.powweb.com> wrote:
> 
> >On Tue, June 8, 2021 6:43 am, Bill Purvis wrote:
> >> Stagg dual DI box.  
> >
> >Is it this device?
> >https://staggmusic.com/en/products/view/SDIST-2-channel-passive-di-box-with-monostereo-switch/
> >
> >I don't see any specifications, so I'll just guess that it is a pair
> of
> >low cost transformers inside the case.
> >
> >David Kastrup's advice about verifying the adapters cables is
> > probably the first place to start.
> >
> > > to get a lot of hum pickup on that, which I think is down to the
> > > proximity to the laptops.  
> >
> >The only mains frequency noise around a laptop would be the power
> > supply,

I have a powered USB2 hub here. When its power supply is connected, I get some hum or noise. I don't know if that's a possibility here.

My old band's sound set up - 12-channel Firewire audio, compressor, amp, in a single rolling cabinet - had a rackmount power conditioner that powered everything, including the mixer. Maybe something like that would help?

---
David W. Jones
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http://dancingtreefrog.com

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