PS Audio Humbuster HBAC Owner's Reference Manual - page 10
4826 Sterling Drive, Boulder, CO 80301
PH: 720.406.8946 service@psaudio.com www.psaudio.com
Questions and Answers 6
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Questions And Answers
Owner’s Reference
Humbuster HBAC
©2004 PS Audio International Inc. All rights reserved.
The Humbuster is best left powered on at all times. The current draw is negligible and keeping it
powered on will make sure the internal AC capacitors inside the unit stay working properly.
There is no harm in leaving the unit on at all times as the lifespan of the HBAC will be unaffected by
leaving it on.
There are no internal fuses or any components on the inside of the HBAC 1 that are user
serviceable. The components inside the HBAC have lethal voltages when powered and even when
unpowered. Capacitors inside the HBAC can retain an electrical charge after the unit has been
powered down. Do not attempt to get inside the unit for any reason. Should the HBAC cease to
function, contact your dealer or PS Audio’s service center for help.
The Humbuster will generate heat under some conditions. Those conditions are when a lot of
power is being passed through the HBAC. The HBAC can handle loads drawing up to 15A on an
intermittent basis, like that of a high power amplifi er playing music. The voltage drop of the internal
diodes causes heat to be dissipated under load. The greater the load the greater the heat. Large
power amplifi ers, projectors and anything using a lot of power may cause the HBAC to produce
heat. This is entirely normal.
The AC receptacle is a critical link in the electrical chain. If you are using a standard AC wall
receptacle to power your equipment, we would recommend the use of a Power Port AC receptacle,
a hospital grade AC receptacle or at the minimum a high quality spec grade receptacle, like the one
on the HBAC itself. The connection between the wall AC receptacle and your equipment can be a
critical link in the success of your equipment’s performance.
Placement of the HBAC is not critical. It may be wall mounted using our optional wall mount plate
assembly. Contact your dealer, distributor or PS Audio for details on purchasing the wall or ceiling
mount kit.
Placement with respect to other equipment can be important. In general, place the HBAC between
the unit you are powering and the AC source. If you are using a power conditioner, balanced
isolation transformer or Power Plant, place the HBAC between those devices and the unit you will be
powering.
Isolation through the use of spikes, cones or Sorbothane feet is recommended for the HBAC if
space and budget allows. Isolation of any piece of high-end stereo and theater equipment is always
recommended wherever practical.
Using multiple HBAC’s in series with each other will increase the level of hum reduction due to DC
on the line. However, we do not recommend the use of multiple HBAC devices as DC levels on the
AC line high enough to go beyond the 1 volt capability of the HBAC are problematic and should be
looked at by an electrician.
Should the unit
be on all the
time?
Are there any
internal fuses?
Is it normal that
the unit gets hot?
Is the AC
receptacle
important?
Placement?
Isolation?
Multiple HBAC?