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PS Audio BHK Signature 250, Owner'S Reference Manual

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Owner’s Reference  

BHK Signature Amplifiers

4826 Sterling Drive, Boulder, CO 80301   

 

 

 

 

15-070-01-1

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

 

Rev A2

Owner’s Reference

©2015 PS Audio Inc.  All rights reserved.

®

Instructions for Use

BHK Signature 250 and 300 Amplifiers

™

 

Summary of Contents for BHK Signature 250

Page 1: ... Amplifiers 4826 Sterling Drive Boulder CO 80301 15 070 01 1 PH 720 406 8946 support psaudio com www psaudio com Rev A2 Owner s Reference 2015 PS Audio Inc All rights reserved Instructions for Use BHK Signature 250 and 300 Amplifiers ...

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 th...

Page 3: ...ted 5x20mm 120vac Countries 1 2 amp slow blow H rated 5x20mm 1 10 amp slow blow H rated 5x20mm 230vac Countries 1 1 6 amp slow blow H rated 5x20mm 1 5 amp slow blow H rated 5x20mm Accessories Included US NEMA 5 15P all versions Schuko CEE7 7 230V version UK BS 1363 230V version Audio Inputs RCA Unbalanced XLR Balanced Speaker Outputs Signature 250 Gold plated copper binding posts 2 pair per channe...

Page 4: ...Rated power 8Ω 850W Rated power 4Ω 1600W Performance Signature 300 Output Power 120VAC Mains 1KHz 1 THD 8Ω 300W minimum 4Ω 600W minimum 2Ω 1000W minimum short term 2Ω 750W long term per IEC60065 Gain 30 5dB 0 5dB Sensitivity 1 5V Input Impedance Unbalanced 50KΩ Balanced 100KΩ Output Impedance 50Hz 2 8VRMS 0 1Ω Frequency response 2 8VRMS 10Hz 20KHz 0 1dB 10Hz 125KHz 0 1 3 0dB THD 1KHz 1W 8Ω 0 02 20...

Page 5: ...00 Each of the connectors was engineered specifically to benefit the performance qualities of the BHK Signature The unit is shipped with a pair of hand matched Gold Lion 6922 vacuum tubes installed in their proper sockets and ready for use If you wish to experiment with different tubes you may use most 6 or 7 Series triode without changing the bias which is adjusted automatically Tube rolling as i...

Page 6: ...d at its preset voltages such as 230 for most of Europe and Asia 100 volts for Japan and 120 for the US and other similar countries Immediate damage can occur if you try and power the BHK on a voltage it was not designed to operate on Connecting cables matter Carefully choose your speaker cables and connecting cables to the equipment Our preference for input cables is balanced XLR type but well bu...

Page 7: ... dual triode tubes Different tubes require different bias currents but the BHK will automatically adjust the current to exactly what is needed To replace tubes in the BHK follow these steps Turn off the main AC power either by unplugging the power cord from the AC source or turning off the main power switch on the rear panel Remove the rear tube cover by loosening the two screws and remove the tub...

Page 8: ...ulder CO 80301 15 070 01 1 PH 720 406 8946 support psaudio com www psaudio com Rev A2 Owner s Reference 2015 PS Audio Inc All rights reserved Owner s Reference BHK Signature Amplifiers Find the area without pins Match the tube to the socket 3 ...

Page 9: ...nded use typically a year or two of service their performance decreases slightly and the BHK will not sound as it did This indicates it is time to change the tubes Under normal usage we recommend changing the tubes every one to two years Replacement matched pairs are available from PS Audio as well as numerous tube retailers It probably makes sense to stock a fresh pair of tubes just in case While...

Page 10: ... block of high purity copper and machined on a lathe then hand polished and gold plated The connectors can accept spade banana or wire connections There are two sets for each channel on the Signature 250 and two sets for the single mono channel on the Signature 300 Most systems will use only one set of the binding posts to connect the speaker cable Use only the finest speaker cables and connectors...

Page 11: ... the preamplifier is balanced XLR cables Balanced signals are lower in noise provide an extra 6dB of level and take advantage of common mode rejection Single ended RCA cables can also be good but we shy away from their use at lengths exceeding two meters Once connections have been made to both the loudspeakers and the preamplifier it is time to plug the AC power source in BHK amplifiers are voltag...

Page 12: ...at a reduced heat In standby it is permissible to change inputs and output connections as no signal may pass It is not recommended to change tubes while in the standby mode If you wish to change tubes please remove all AC power from the unit and wait at least thirty minutes once power has been removed before changing tubes If the front panel logo light begins blinking and no sound comes from the a...

Page 13: ...ushing 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 pl...

Page 14: ...und loop The easiest way to figure out where ground loop problems lie is by the process of elimination You need to determine where the hum or buzz is coming from within your system If the hum buzz goes away when you remove the inputs to the power amp your next step will be to reconnect the amp and move further down the chain It is important to do this in the correct order and take the time to perf...

Page 15: ...your local cable TV company for advice The matching transformer will be placed between the cable TV cord and the cable box TV or processor Just remember take the system down to its simplest level of connection Find a way to hook the system up with as many pieces of the system not connected as possible Keep it simple and get it to the point where the hum s gone Then start adding back components one...

Page 16: ...t 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 years on the amplifier a...

Page 17: ...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 18: ... 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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