Butler 2250 Owner'S Information Download Page 1 | Manualshive

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Butler 2250 Owner'S Information Download Page 1

A U D I O, I N C

WWW.BUTLERAUDIO.COM

OWNER'S INFORMATION FOR

MODEL 2250

MODULAR DIRECT-COUPLED

VACUUM TUBE DRIVEN

TWO CHANNEL POWER AMPLIFIER

UTILIZING

b

T H E R M I O N I C

VACUUM TUBE TECHNOLOGY

Concept & Design:

B K Butler

Patented in the USA

Worldwide patents pending

"Tube Driver", "Tube Driver Blue", "Thermionic" and Blue Tube illumination appearance / method are

trademarks of or patented by

BK Butler

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Summary of Contents for 2250

Page 1: ...UUM TUBE DRIVEN TWO CHANNEL POWER AMPLIFIER UTILIZING b T H E R M I O N I C VACUUM TUBE TECHNOLOGY Concept Design B K Butler Patented in the USA Worldwide patents pending Tube Driver Tube Driver Blue Thermionic and Blue Tube illumination appearance method are trademarks of or patented by BK Butler ...

Page 2: ...put Protection 2 Use and Operation Front Panel Power Switch Rear Panel Remote Jack 3 Inputs Speaker Output Binding Posts Speaker Phasing Remote Operation 4 Specifications 5 Cable Quality The Marvelous Vacuum Tube 6 Tube Reliability 7 Warranty Repair Policy 8 ...

Page 3: ... ended ZERO global negative feedback circuit topology Previous hybrid designs employing vacuum tubes generally utilized tubes only in impedance isolated preamp or driver stages However Butler places the triodes exactly where they should be DC Coupled through the output power devices to the speakers Therefore the tubes are positioned to naturally and actively respond to the speaker load This also c...

Page 4: ...ms An appropriate source of 120VAC nominal input line voltage with a minimum current supply of 12A is required 230 240 VAC models require approx 50 of the current rating of 120V models Protection Listed below are the various types of internal protection provided for unexpected conditions 1 AC input fuse for protection against any major system power fault Do not replace with a fuse of higher curren...

Page 5: ... LET YOUR AMP BREATHE Use and Operation Important Do not apply power until you have read and understand this section Connect or disconnect cables only with amplifier OFF Note Your new Butler Audio amp is designed to operate in stereo with ONE separate speaker system connected per channel Connect Speaker Outputs to speakers only DO NOT SHORT ANY SPEAKER OUTPUT POST TERMINAL TO ANY OTHER SPEAKER OUT...

Page 6: ...e should be kept as short as possible and away from input cables Shielded cables must NEVER be used as this may cause high frequency loss and introduces a needless capacitive load to the amplifier DO NOT SHORT ANY POST TO ANY OTHER POST Speaker Phasing Upper post RED ring is POSITIVE Lower post BLACK ring is NEGATIVE Correct speaker phasing is essential for optimum operation Note Never short ANY s...

Page 7: ...ts into 8 Ohms S N ratio Better than 120dB A Weighted Slew Rate 15V uSec Vacuum Tube Complement One 6SL7GC twin triode per channel Idling Consumption Approx 40Watts Approx 0 3A 120VAC or 0 15A 230VAC Full Power AC Consumption Model Power Nominal Current 120VAC 230VAC 2250 8 Ohms 4 Ohms 720 Watts 1200 Watts 6A 10A 3A 5A Dimensions 17 W x 16 D x 8 5 H with Feet 7 H without Feet Weight 43 Lbs 19 2 Kg...

Page 8: ...tube For example input and output pins could be reassigned B voltages and bias currents switched to any desired value or configuration During these test it was noted that a Phantom voltage was being generated It turned out to be nothing less than the original thermionic effect that one of Edison s assistant technicians a Mr Hammer discovered in the late 1800 s while testing early light bulbs He no...

Page 9: ...Floyd s David Gilmour if BK Butler s low voltage tube guitar pedals aren t the most reliable and best sounding ever made What this means to you is that the tubes installed in your new Butler amplifier should last as long as the other high quality electronic components in the design No special tube care replacement matching biasing or maintenance is usually necessary In the unlikely event a tube be...

Page 10: ... purchased from anauthorized Butler Audio retailer h Any amplifier purchased outside the USA Amplifiers purchased in another country are covered only by that country s distributor and not by Butler Audio Any removal alteration or tampering of the serial numbers or tampering with the inside of the amplifier will result in voiding the warranty Butler Audio reserves the right to determine and make fi...

Page 11: ...A U D I O I N C WWW BUTLERAUDIO COM ...

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