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THE REFERENCE 7270 SERIES II PURPOSE AND FUNCTION

The Reference 7270 series II is a high current, seven channel power amplifier. It is
designed to be used in all types of audio or audio/video systems. 

DESIGN AND CONSTRUCTION

The Reference 7270 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 7270 series II operates with a class A predriver and AB high current
MOSFET power output stages. It is capable of reproducing the most demanding audio
signals at its rated power levels. 

FEATURES

THX Ultra Certified

 - The unit has passed a rigorous series of Lucasfilm THX quality and

performance tests and it is guaranteed that this amplifier will give superb performance for
years to come.

Toroidal Transformer

 - Efficient, high current, shielded transformer that supplies the

amplifer with a clean and constant supply of power, even during highly demanding
source material passages.

Discrete Circuitry

 - Dynamically provides a full, accurate, and three dimensional

reproduction of source material.

Class A Predriver

 - Improves low level detail and clarity for smoother, more musical

sound.

AB MOSFET Output Stage

 - Provides efficient and linear power delivery, as well as

protection from thermal overload.

Gold Plated Connectors

 - Improved connections for better sound quality and minimized

signal loss and degradation.

1% Metal Film Resistors

 - Higher quality resistors for lower noise, better sound, and a

greater degree of repeatability.

High Current

 - Ability to cleanly, accurately, and reliably reproduce demanding

recordings or source materials into low impedance drivers and speaker systems.

Computer Grade Capacitors

 - Large capacity computer grade electrolytic capacitors for

extended low frequency control, increased power supply, and improved dynamics.

Fused Outputs

 - Provides limited protection from accidental shorting of amplifier outputs.

Heavy Duty Gold Binding Posts

 - Improved current carrying capacity and sound quality

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P/N 13009 Rev.0102

  

Summary of Contents for Reference 7270 Series II

Page 1: ...Reference 7270 series II Seven Channel Amplifier OWNER S MANUAL B K Components Ltd P N 13009 Rev 0102...

Page 2: ...B K Components Ltd 2100 Old Union Road Buffalo New York 14227 P N 13009 Rev 0102...

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

Page 4: ...f 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 continuous power being delivered by...

Page 5: ...ficient high current shielded transformer that supplies the amplifer with a clean and constant supply of power even during highly demanding source material passages Discrete Circuitry Dynamically prov...

Page 6: ...nto the amplifier There are seven level controls on the back of the amplifier One level control for each channel 6 Inputs For connecting signal patch cables interconnects from the preamplifier to the...

Page 7: ...rent speakers that may have different speaker ratings and efficiencies the level controls may be used to match the output level of the speakers in the system Example Using a speaker with an efficiency...

Page 8: ...always be connected to the speakers jack Spade connector Banana jack Here is a typical amplifier output setup Page 6 P N 13009 Rev 0102 8 DC B 4 E 4 2 C A B 4E4 78 4E4 78 4E4 78 4E4 78 4E4 78 4E4 78...

Page 9: ...o be kept out of traffic areas The process of optimizing the system will include the type of cable the length of the run and the obstructions it must deal with along its run Your dealer can advise you...

Page 10: ...left front output of your preamplifier to channel 4 input on the amplifier remember to connect your left front speaker wires to channel 4 s outputs Always observe polarity when connecting speakers con...

Page 11: ...an a B K series preamplifier is used to control one or multiple amplifiers only the control output voltage from the source is critical It must be within the range as indicated on the rear panel of 5 2...

Page 12: ...me or all selected channels on LED illuminated 1 Reconnect power cord 2 Check AC switch or fuse 3 Check for shorts or overloading 4 Supply Control IN with a 5 24 Volt supply Page 5 1 Power cord not pl...

Page 13: ...lew rate 14 V sec 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 78 lbs max Power consumption 1830 w...

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 13009 Rev 0102...

Page 16: ...B K Components Ltd 2100 Old Union Road Buffalo New York 14227 www bkcomp com P N 13009 Rev 0102...

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