PS Audio BHK Signature 250 Owner's Reference Manual - page 13
Questions
and
Answers
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Rev A2
Questions And Answers
©2015 PS Audio Inc. All rights reserved.
®
Owner’s Reference
BHK Signature Amplifiers
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 amplifier be placed as close to the loudspeakers as practical.
All equipment benefit 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 first break in period of 24 hours should be out of
standby mode and fully on. We recommend this first 24 hours initial break in period then keeping the
amplifier 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 amplifier and can have a dramatic
impact on the musical performance of the BHK amplifier. 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 benefit. Do not assume they will better the amplifier’s
performance. As always, use your ears as guides. If it doesn’t sound better, it’s best to avoid them.
Bridging an amplifier uses the left and right channels to create a single more powerful version. The
BHK does not permit bridging and damage to the amplifier’s output circuitry may occur if you attempt
this.
Should the unit be
on all the time?
Fuses?
Break in?
The logo light
blinks at first
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