Owner's Manual

4826 Sterling Drive, Boulder, CO 80301 Questions and Answers
PH: 720.406.8946 [e-mail] www.psaudio.com 15-070-01-1
Rev B
Questions and Answers
©2021 PS Audio Inc. All rights reserved.
®
Owner’s Reference BHK Signature Ampliers
Should the unit
be on all the
time?
Fuses?
Break in?
The logo light
blinks at rst
The logo light
blinks and the
amp does not
play
Do connecting
cables matter?
Placement?
What about
power
conditioners?
Can I bridge
the BHK?
8
We recommend leaving the rear panel master power switch on at all times. We further recommend
placing the BHK in standby mode when the listening session is over. Standby mode is accessed
through the front panel PS Audio logo button.
There are multiple fuses in the BHK accessible through the back panel. Please see instructions
earlier in this manual for additional information about changing or replacing them.
Placement of the BHK is important for proper cooling and best audio practices. Make certain
wherever you place the BHK there is adequate ventilation space above and below the side heat
sinks. Best audio practices recommend the amplier be placed as close to the loudspeakers as
practical.
All equipment benet from a period of on-time known as break in. We recommend an initial 24
hours of on time. It is not necessary to play music through the BHK to achieve proper break in, only
that the amp is on and drawing power from the wall. The rst break in period of 24 hours should
be out of standby mode and fully on. We recommend this rst 24 hours initial break in period then
keeping the amplier plugged in and the master power switch on, but the amp in standby mode.
When the BHK comes out of standby mode through pushing the front panel logo light, that light
will blink for 30 seconds. This is normal, and shows the tubes are warming up and stabalizing
before music playback.
This indicates a fault mode has been reached. The logo light will continue to blink until reset
with a push. Typically this happens when the music played is too loud or the impedance of the
loudspeaker dipped too low. We advise resetting and playing a little softer. If the blinking does not
reset, refer to the earlier pages in this manual for help.
Connecting cables matter greatly. They are the ins and outs of your amplier and can have a
dramatic impact on the muscal performance of the BHK amplier. Great care in matching cables
and their characteristics should be taken when playing the BHK.
Most power conditioners restrict the power and increase impedance going into the BHK and
should be avoided. Some, like the PS Audio P10 AC regenerator do the opposite by lowering
impedance and unleashing more power than available from the wall. Others are parallel designs
and can be used without degradation, sometimes to great benet. Do not assume they will better
the amplier’s performance. As always, use your ears as guides. If it doesn’t sound better, it’s best
to avoid them.
Bridging an amplier uses the left and right channels to create a single more powerful version.
The BHK does not permit bridging and damage to the amplier’s output circuitry may occur if you
attempt this.