background image

6

Overview

Congratulations on your purchase of a new Oldfield Dual 40 amplifier.  The Dual 40 is capable of 
producing a vast array of tones with its two channels and expanded functionality.  The Dual 40 is 
well suited for just about any style of music and any playing situation.

This amplifier is all tube and hand-wired using the best quality components available for guitar 
amplification.  It is built to last a lifetime and give the owner countless hours of enjoyment whether 
on stage, in the studio, or in the home.

The Dual 40 has two very distinctly voiced channels.  Channel One leans towards the British style 
tones and Channel Two is purely American.  Each channel has its own gain and full tone controls.  
The master volume is global to the amplifier. Channel switching and certain functions are controlled 
either through panel switches or the supplied foot controller.

Feature summary:

Two channels
40 watts output power into 8

Ω

 

All tube, hand-wired circuitry 
(2) EL34 Power Section
(4) 12AX7 Preamp Section
5AR4 Tube / Solid State Selectable Rectifier
Full Power / Half Power Option
Fully Bypassed Effects Loop
Finger–jointed Cabinet

Summary of Contents for Dual 40

Page 1: ...1 Oldfield Amplifiers User Guide Dual 40 6740...

Page 2: ...mplifier is built to provide you with the best tonal experience and durability available in a guitar amplifier As with all Oldfield s it is hand built with you the player as the central focus of our e...

Page 3: ...3 Table Of Contents Important Safety Instructions 4 5 Overview 6 Front Panel Controls And Features 7 Rear Panel Controls And Features 8 Tube Layout 9 Warranty 10 Operational Notes 11...

Page 4: ...a three prong grounded plug This is a safety feature If you are unable to insert the plug into the outlet contact an electrician to replace your obsolete outlet Do not defeat the safety purpose of thi...

Page 5: ...f producing very high sound pressure levels which may cause temporary or permanent hearing damage Use care when setting and adjusting volume levels during use Failure to comply with any of these safet...

Page 6: ...yment whether on stage in the studio or in the home The Dual 40 has two very distinctly voiced channels Channel One leans towards the British style tones and Channel Two is purely American Each channe...

Page 7: ...Controls the volume of Channel Two Rotating the control clockwise will make the Channel Two volume louder and increase overall gain and harmonics 9 Channel Two Treble Rotating the control clockwise wi...

Page 8: ...When operating in triode mode the amp will produce roughly half of the full power It needs to be noted that while in Triode Mode the amplifier tone is different than when operated in full Pentode Mod...

Page 9: ...40 is a fixed biased amplifier and therefore will need to be re biased when changing output tubes PHASE INVERTER TUBE Replace with any high quality 12AX7 tube PER AMP GAIN TUBE Channel Two Replace wit...

Page 10: ...lifier panel switch must be in the mode 2 position in order for the footswitch to work 3 Boost 1 Selector Stomp the Boost 1 footswitch to activate the boost function for channel one When the channel o...

Page 11: ...arge Power Transformer Output Transformer And Choke These items are guaranteed for one year after date of purchase against manufacturer s defects If a failure occurs due a defect in manufacturing Oldf...

Page 12: ...Mode Switch 2 Mid 1 Switch Off Channel One Mode 1 Gain 2 O Clock Channel One Mode 2 Gain 2 O Clock Master 11 O Clock Tone Controls Treble 1 O Clock Middle 12 O Clock Bass 11 O Clock 80 s Hair Band To...

Reviews: