“Hum” in an audio system is often caused by loop effects
which act like antennas. These loops can easily pick up a
60 Hz (or higher harmonics) hum transmitted by electrical
wiring. Typically, these loops are connected via grounds,
more commonly called “ground loops”. The safest way to
eliminate unwanted noise is with the CleanBOX II. Some
examples of Ground Loops:
• The power ground of a synthesizer, connected to the signal
ground of the synth, into a mixer’s ground, then into a
mixer’s power ground.
• The signal ground of a send effect (reverb, delay) into a
mixer, and the connecting power grounds of the mixer and
the unit.
• The power ground of a guitar amplifier, connected to a sig-
nal processor which has a second guitar amplifier on the
other channel, and then the second guitar amp’s power
ground.
The CleanBOX II easily removes ground loops without any
signal degradation.
Specifications:
Frequency Response:
10Hz – 50kHz, +/- .5dB
@ +4dBu
THD:
.01% Typical @ 1kHz, +18dBu,
<.05% @ 100Hz, +24 dBu
Insertion Loss:
.4dB @ 100kOhm Load, 5.5dB
@ 600Ohm Load
Connections:
1/4” TRS balanced/unbalanced
jacks
Power:
Passive
Dimensions:
4.5 x 2.875 x 1.5 inches
(114mm x 73mm x 38mm)
Weight:
.9 lbs (.4kg)
Creative audio solutions in cool little boxes.
ARTcessories
™
February 2004
CleanBOX
II
Ground Loop Eliminator
DESIGNED & DISTRIBUTED BY: APPLIED RESEARCH AND TECHNOLOGY • 215 Tremont Street • Rochester, New York 14608 • USA
For Customer Service, please call: 585.436.2720 • Email: [email protected] • www.artproaudio.com • ART-ARTcs-02/04
