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PS Audio BHK Signature Preamplifier, Instructions For Use Manual

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PS Audio BHK Signature Preamplifier Instructions For Use Manual Download Page 15

4826 Sterling Drive, Boulder, CO 80301   

 

 

 

 

Getting Started

PH: 720.406.8946 [email protected] www.psaudio.com   

 

15-071-01-1

           

Rev A

Getting Started

©2016 PS Audio Inc.  All rights reserved.

®

  

Owner’s Reference  

BHK Signature Preamplifier

The BHK preamplifier is supplied with 12AU7 dual triode vacuum tubes. These have a heater (filament) 
voltage of 12 volts (that’s what the “12” in 12AU7 indicates). Replace these tubes with a similar design 
that runs on +12 volts for its filament voltage.

It is possible to use a lower voltage tube, such as a 6 or 7 series dual triode. To use a +6 or 7 volt 
tube, you must change the filament voltage. This can be accomplished by moving two jumpers, 

labeled JP11A and JP12A, inside the BHK Preamplifier. You can also change the bias current running 
through the tube if you wish. The bias we use from the factory is 4 milliamperes. Using the second 
internal jumper set, labeled JP7 and JP8, this can be increased to 5 milliamperes by using the supplied 
connector to jumper JP7 and JP8 (they are normally not jumpered for 4 ma). If you don’t understand 
these setting and terms, best to probably leave it at the factory setting.  Otherwise, if you really need 
to know, contact our service department.

HEADPHONE AMPLIFIER

The BHK Preamplifier features a state of the art discrete MOSFET headphone power amplifier inside. 
Designed with a love of high-end headphones in mind, Bascom King built a stunning amplification 
device internal to the preamplifier.

10

Summary of Contents for BHK Signature Preamplifier

Page 1: ...ture Preamplifier 4826 Sterling Drive Boulder CO 80301 PH 720 406 8946 service psaudio com www psaudio com 15 071 01 1 Rev A Owner s Reference 2016 PS Audio Inc All rights reserved Instructions for Use BHK Signature Preamplifier ...

Page 2: ... a grounding type plug If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Unplug this apparatus during lightning storms or when unused for long periods of time When making connections to t...

Page 3: ...elections to place any acceptable 6 7 or 12 series vacuum tubes inside the preamp The twin hand selected vacuum tubes that ship with the BHK are the preferred models we recommend and use in PS Audio s Music Room One reference system The BHK Signature Preamplifier features 5 identical balanced and single ended inputs Each of the inputs whether single ended RCA or balanced XLR are immediately conver...

Page 4: ...gnature Preamplifier When compromise is not an option analog audio products benefit from incorporating through hole discrete parts in the signal path Hand selected through hole PRP resistors high grade Audiophile capacitors and the finest of discrete parts are used throughout the BHK Signature Preamplifier Nothing was spared in its design Even the solder we use has been auditioned for best sound R...

Page 5: ...rfection coupled with one company s obsession to bring musical truth to as many people as it can PS Audio has consistently sought out the finest design talent both from within and from outside for the benefit of music lovers around the world The BHK Signature embodies the lifelong design experience of Bascom H King and executed by PS Audio s chief engineer Bob Stadtherr responsible for mechanizing...

Page 6: ...utput for compatible power amplifiers The XLR connector delivers a balanced signal to compatible power amplification devices Users may connect both the RCA and the XLR outputs at the same time This permits users to use one output for a power amplifier the other for a subwoofer for example Please be advised that the XLR output has twice the output voltage as the RCA input Typically this results in ...

Page 7: ...ny one input If your source component has both RCA and XLR outputs available to connect to the preamplifier it is always preferable to connect via the balanced XLR if possible Once connected either through the RCA or the XLR connector the BHK Preamplifier will now be connected without any further action on the user s part some preamplifiers require the user to select between RCA XLR via a switch E...

Page 8: ...r ports on the rear panel of the BHK Preamplifier Each of the two trigger jacks outputs a 12V signal to connected equipment when the BHK Preamplifier front panel standby button is activated The 12V signal will stop when the BHK preamplifier is in standby mode These trigger outputs are typically used to switch on off compatible power amplifiers when the BHK Preamplifier is active The matching BHK S...

Page 9: ...n a 30 second countdown as the vacuum tube is activated At the conclusion of the 30 second countdown the outputs are activated and the BHK Preamplifier is ready for operation SELECT THE INPUT The first step is to select the input you wish to play This can be accomplished with the remote control or through the front panel selector and display Touch the selector button to the left of the screen The ...

Page 10: ...ctor button and that letter will appear as part of the name and the cursor will move to the next letter in the name Repeat the process until you spell the input name There is one space inluded as well as a back character that will move the cursor back one space There is also an escape character which leaves the edit menu without further changes Press and hold the selector button to leave the namin...

Page 11: ...ront channels when watching a film To assign any one of the 5 channels as the HT input where you would connect the left and right channels of your SSP to press and hold the left button to enter the setup mode Toggle the button until you reach the HT setup mode Press and hold the select button to enter the HT Setup edit menu Rotate the level control until you select the appropriate input you wish t...

Page 12: ... level control turn the knob until you get to the all zero input Then press the selector button again to set the choice SETTING THE BALANCE In rare cases it may be necessary to change relative level between the left and right channels This is handled by the balance control The balance control can be accessed through the supplied remote control or through the setup menu To access Balance through th...

Page 13: ... display responds to the volume control and the remote control No digital processing of any kind occurs in the BHK Preamplifier signal path Think of the microprocessor as taking care of the housecleaning chores The microprocessor runs on software Unlike our DirectStream DAC which also uses software no change in sound quality of the BHK Preamplifier will ever be affected by a change in software sin...

Page 14: ... few seconds to start warming up before turning on the power amplifier with the trigger jack To set the delay time enter the setup menu press and hold the button for 3 seconds Toggle the selector button to the Trigger menu Turn the level control up or down to adjust the length of delay time for the trigger output to activate Once you have the desired delay time press the button on the left side of...

Page 15: ...e accomplished by moving two jumpers labeled JP11A and JP12A inside the BHK Preamplifier You can also change the bias current running through the tube if you wish The bias we use from the factory is 4 milliamperes Using the second internal jumper set labeled JP7 and JP8 this can be increased to 5 milliamperes by using the supplied connector to jumper JP7 and JP8 they are normally not jumpered for ...

Page 16: ...se of headphones without also having the loudspeakers play at the same time THE REMOTE CONTROL The BHK Preamplifier comes with a remote control that will handle most functions on the preamplifier The device is an infra red operated hand held instrument that must be pointed at the BHK Preamplifier to work Controls are mostly self explanatory OFF The BHK Preamplifier remote control features a separa...

Page 17: ...e all PS Audio PerfectWave products out of Ready Standby mode If just the BHK Preamplifier has been placed in Ready Mode pressing this button will turn it back on without affecting any other piece of PerfectWave gear DIM The DIM function on the remote control blanks the display on the preamplifier The display will return for 7 seconds whenever any button on the remote is pressed then blank again T...

Page 18: ... volume level on the front panel display Press the Mute button just above the word Preamp on the remote control to disengage If you re playing on loudspeakers check to make sure you haven t got a headphone or headphone jack plugged into the BHK Preamplifier s headphone input The preamp s outputs are automatically disconnected when a headphone jack has been inserted If there is too much energy in o...

Page 19: ...e prong AC plug into a two prong AC plug and in the act of converting three prongs to two prongs the ground from the wall socket is disconnected Try one of these on the preamp or the power amp or both If you determine that there is still no hum present when the preamp and power amp are connected with no inputs then selectively begin plugging in your various sources to the preamplifier one at a tim...

Page 20: ...In the event your product fails your sole remedy under this limited warranty shall be to return the product to PS Audio or an authorized PS Audio repair center The product will be repaired without charge for parts or labor replaced or the purchase price refunded through the original point of purchase at the option of PS Audio What is the Period of Coverage This limited warranty is in effect for 3 ...

Page 21: ...vailable for warranty replacement How Can the Warranty be Transferred This warranty is for the benefit of the original purchaser of the product The warranty may be transferred to a subsequent purchaser during the 3 year warranty period To do this you must contact PS Audio directly to set up transfer of registration How Do I Get Warranty Service To locate an authorized PS Audio repair center for se...

Page 22: ... many countries of the world In each country the authorized importing distributor has accepted the responsibility for warranty of products sold by that distributor Warranty service should be obtained where the product was purchased Changes to Our Products PS Audio reserves the right to modify the design of any product without obligation to purchasers of previously manufactured products and to chan...

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