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The Reference 7250/7260 series II purpose and function

The Reference 7250/7260 series II is a high current, five/six channel power amplifier.  It
is designed to be used in all types of audio or audio/video systems.  

Design and construction

The Reference 7250/7260 series II utilizes high quality electronic circuitry to achieve an
environment wherein a detailed, transparent, and highly musical sound can be realized.
The high quality parts complement includes state-of-the-art solid state devices, 1% metal
film resistors, computer grade electrolytic power supply capacitors, and a high capacity
toroidal transformer.

The Reference 7250/7260 series II operates class A predriver and AB high current
MOSFET power output stages.  It is capable of reproducing the most demanding audio
signals at rated power levels. 

Features

Toroidal Transformers

 -           Efficient, high current, shielded transformer.

Discrete Circuitry

 -                   More accurate and three dimensional reproduction of       

                                                   source material.

Class A Predriver

 -                   Improves low level detail for smoother, more musical        

                                                   sound.

AB MOSFET Output Stage

 -    For efficient linear power delivery and protection from       

                                                   thermal overload

Gold Plated Connectors

 -        Improved connections for better sound and minimized      

                                                   signal loss and degradation.

1% Metal Film Resistors

 -        Low noise resistors for better sound and a greater            

                                                   degree of repeatability.

High Current

 -                           Ability to reproduce demanding recordings.

Computer Grade Capacitors

 - Large capacity computer grade electrolytic capacitors for

                                                   extended low frequency control and improved dynamics.

Fused Outputs

 

-

                        

Provides protection from accidental shorting of amplifier  

                                                    outputs.

Heavy Duty Binding Posts

 

-    Improved current carrying capacity and ease of use.

   

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P/N 13007 Rev.0004

Summary of Contents for 7250

Page 1: ...B K Components Ltd P N 13007 Rev 0004 Reference 7250 7260 series II Five Six Channel Amplifier OWNER S MANUAL...

Page 2: ...B K Components Ltd 2100 Old Union Road Buffalo New York 14227 P N 13007 Rev 0004...

Page 3: ...page 4 Rear panel description page 4 6 Level controls page 5 Inputs page 5 6 Outputs page 6 Control Muting page 8 9 System installation page 7 Making the connection page 7 8 Troubleshooting page 10 C...

Page 4: ...if the power rating of each individual driver is exceeded by the amplifier Make sure that all the drivers in your speaker system are capable of handling not only the power being delivered by the ampl...

Page 5: ...emanding audio signals at rated power levels Features Toroidal Transformers Efficient high current shielded transformer Discrete Circuitry More accurate and three dimensional reproduction of source ma...

Page 6: ...d to the amplifier 3 Speaker outputs For connecting the speakers to the amplifier Explained further on page 6 4 Amplifier control muting input output To provide remote switching of mute on off of the...

Page 7: ...t driver impedances Any fine tuning should be done by the preamplifier Example When using 4 ohm and 8 ohm speakers together the 4 ohm may sound louder than the 8 ohm at a given volume level The level...

Page 8: ...d to accept a banana type plug or spade lug connector shown below and are color coded for easy identification The positive post should always be connected to the speakers jack The negative post should...

Page 9: ...n possible use a separate AC power line for the amplifier one that is not shared by any other household component Important Tip Take a piece of string longer than the longest cable run and mark it at...

Page 10: ...problems that cannot be traced to the source or the material being played consult the TROUBLESHOOTING section on page 10 Note When turning equipment off the amplifier should always be turned off firs...

Page 11: ...IS CIRCUIT If the control function is desired each unit in the system must remain connected at all times and the control must be enabled To enable the control function the CTRL ENABLE button must be o...

Page 12: ...Speaker fuse blown 6 Level controls adjusted improperly No sound on some or all selected channels on LED illuminated 1 Reconnect power cord 2 Check AC switch or fuse 3 Check for shorts or overloading...

Page 13: ...Slew rate 14 V usec Dynamic headroom 1 2 dB S N A weighted 95 dB Voltage gain 28 Line voltage 120 220 240 VAC switchable Dimensions O A 17 w X 19 25 d X 7 25 h Weight 70 lb Power consumption 1830 watt...

Page 14: ...B K shall not be liable for any incidental or consequential damage arising out of a defect in material or workmanship of the unit during the terms of this warranty or thereafter Some States do not all...

Page 15: ...B K Components Ltd 2100 Old Union Road Buffalo New York 14227 P N 13007 Rev 0004...

Page 16: ...B K Components Ltd 2100 Old Union Road Buffalo New York 14227 www bkcomp com P N 13007 Rev 0004...

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