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FOUR STROKE SERIES USER MANUAL 

V1.0 

 

 

In  1968,  Orange  founder  and  CEO  Cliff  Cooper  borrowed  £50  to  start  a  musical  instrument  shop  and 
recording studio in London’s West End. Against the backdrop of one of the city’s most vibrant districts, the 
shop was decorated with psychedelic script and painted a bright shade of orange which gave the company 
its name.  
 
Shortly  after,  we  began  designing  and  manufacturing  our  own  products  which  quickly  established  a 
reputation for their innovation, superior quality and distinctive sound. Orange has been a pioneering force 
in the industry ever since, and today, with a team of the world’s finest amplifier engineers, we continue to 
push  back  the  boundaries  of  conventional  design.  From  our  very  humble  beginnings  on  New  Compton 
Street, Orange Amplification has grown into an iconic global brand, earning legions of loyal supporters along 
the way who continue to make the 

‘Voice of the World’

 heard. Welcome to the Orange family. 

 
 
 
 
 
The 

4 Stroke Series

 is our offering to the demanding modern bass player – everything you need, and nothing 

you don’t. Featuring all-analogue circuitry throughout, these amps are all about powerful, full-bodied tones 
with an organic delivery that has passed by a generation of players confronted with an array of lifeless digital 
offerings.  
 

4 Stroke Series

 amplifiers speak with genuine authority, remaining clean, composed and expressive all the 

way up to their extremes, without ever becoming clinical or sterile. With an extensive four band parametric 
EQ  setup  and  Class  A  compression,  these  are  supremely  versatile  amps,  capable  of  performing  in  any 
situation.  
 
Due to the 

4 Stoke’s 

unique feature set, we urge you to  take some time to familiarise yourself with the 

contents  of  this  user  manual.  Deep  exploration  of  the 

4  Stroke’s

  tone  controls  will  help  you  gain  a 

comprehensive understanding of how they affect the overall sound.  Remember: cutting frequencies you 
don’t want to hear is often just as effective as boosting those you do. However, there are of course no rules. 
Training your ears through experimentation will ultimately allow you to unlock the full potential of these 
remarkable amplifiers.   
 
We are confident that you will be delighted with your new purchase and that it will provide you with many 
years  of  enjoyment.  Congratulations,  you  are  now  a  member  of  the 

Legendary  British  Guitar  Amplifier

 

Owners Club! 
 

In the interests of continued product development and improvement, the contents of the manual may be subject to change 

without notice. Ensure you are viewing the latest version at: 

www.orangeamps.com 

 
 
 

INTRODUCTION 

THE 4 STROKE SERIES 

Summary of Contents for 4 Stroke Series

Page 1: ...USER MANUAL 4 STROKE ORANGE MUSIC ELECTRONIC CO LTD LONDON ENGLAND Est 1968 BASS AMPLIFIER SERIES...

Page 2: ...s passed by a generation of players confronted with an array of lifeless digital offerings 4 Stroke Series amplifiers speak with genuine authority remaining clean composed and expressive all the way u...

Page 3: ...s apparatus during lightning storms or when unused for long periods of time 14 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way s...

Page 4: ...age to both the amp and cabinet s Speaker outputs are wired in parallel 1 x 8 Ohm cabinet Use either speaker output 2 x 8 Ohm cabinets Use both speaker outputs 1 x 4 Ohm cabinet Use either speaker out...

Page 5: ...and flash blue at higher COMP settings to indicate the gain reduction 4 BAND PARAMETRIC EQUALISER CUT BOOST Controls the level of the selected frequency with up to 18dB cut or boost FREQUENCY Selects...

Page 6: ...utput power 4 5 VOLTAGE SELECTOR This is factory set for the region in which the amplifier is intended to be sold Do not tamper with this switch Refer to Before Using Your Amplifier 6 AC MAINS INLET C...

Page 7: ...ort pages on orangeamps com Always refer servicing to an authorised Orange technician No user serviceable parts inside Attempts by non authorised personnel to access the interior of the product will v...

Page 8: ...FOUR STROKE SERIES USER MANUAL V1 0 SERIOUS BASS AMPLIFICATION...

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