Got Hum?
Is there too much hum or hiss coming out of your speakers? If you put your ear right next to the
tweeter of your speaker, you should barely be able to hear any hiss in normal conditions, depending
on amps. If the noise is easily heard at a distance, try putting your source on mute, or pause. If this
eliminates the noise, it’s inherent in the source. If the noise is still there when the preamplifier is
muted, try disconnecting the inputs to the amplifier. If the noise is still there when the inputs are
disconnected, and the inputs are shorted with shorting plugs, then your amplifier may need some
servicing. If the noise is not there when the inputs are disconnected, try putting a cheater plug
(ground isolator) on one or all components in order to eliminate a ground loop issue. NOTE: We only
recommend using a ground isolator for troubleshooting purposes, and should be removed after the
problem has been found. Having the ground of any unit disconnected can potentially create a
dangerous situation.
An easy way to locate a noisy component is to replicate the problem then start disconnecting
components one at a time, starting with a source. Digital cable boxes and satellite receivers are
notorious for making ground loop hum. This is normally caused by the potential difference on the
input wire (shield side) for either of the boxes when referenced to ground. If this is the case in your
system, the installation of an isolating transformer would be the easiest solution and are normally
readily available at your local electronics parts store. A better solution is a power strip with grounded
and surge protected F-connectors that you can pass a signal through. Where possible, use the Toslink
inputs. Because of the optical transmission, there isn’t any audio connection path to ground between
components, and the possibility of a ground loop should disappear.
Warranty coverage
Wyred 4 Sound’s warranty obligations are limited to the terms set forth below:
Wyred 4 Sound, as defined below, warrants this Wyred 4 Sound-branded hardware
product against defects in materials and workmanship under normal use for a period of FIVE
(5) YEARS from the date of retail purchase by the original end user purchaser ("Warranty
Period"). If the product has been transferred from the original owner to a second hand owner,
it has a ONE (1) YEAR warranty, valid from the original date of purchase by the original owner.
The remote control is covered under warranty for the first year. If a hardware defect arises and a
WYRED 4 SOUND
DAC-1 LE v1
4235 Traffic Way
Atascadero, CA 93422
PH: 8054669973
FAX: 8054628962
©2014 WYRED 4 SOUND
All rights reserved.
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