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Warranty

The following warranties apply to the original owner of the amplifier.  All warranty work 

must be performed by Oldfield for the warranty to be in effect.  Warranties do not cover 

normal wear and tear or abuse.  Failure to comply with the safety precautions outlined ear-

lier in the owner’s manual will void all warranties.

Rectifier and Power Tubes – Guaranteed for thirty days after date of purchase.  If a failure 

occurs Oldfield will replace any rectifier or power tube during this period free of charge.  

Power tubes can only be replaced by a qualified service technician since a re-bias may be 

necessary.

Preamp Tubes - Guaranteed for ninety days after date of purchase.  If a failure occurs Old-

field will replace any preamp tube during this period free of charge.

Power Transformer, Output Transformer, Reverb Transformer, And Choke - These items are 

guaranteed for ten years after date of purchase against manufacturer’s defects.  If a failure 

occurs due a defect in manufacturing Oldfield will replace any of these items during this pe-

riod free of charge.  Warranties on these items are void if the owner uses any type of power 

soak or attenuator in conjunction with the operation of the amplifier.

Defects Due To Workmanship – Oldfield guarantees the amplifier to be free from workman-

ship defects for 5 years from the purchase date.

Circuit Components – Any failed circuit component will be replaced at Oldfield’s discretion.  

Some circuit components have a limited life such as filter and bypass capacitors and Old-

field must use judgment to determine if the component was at end of life or failed prema-

turely. 

In every case Oldfield guarantees to work with the customer to remedy any situation in a 

timely manner and to the satisfaction of the amplifier owner.

Summary of Contents for Marquis Thirty

Page 1: ...Page 1 Marquis Thirty Owners Guide OldfieldMarquisThirty Marquis30 Pentode Triode Top Cut 1 2 Volume 1 Volume 2...

Page 2: ...fier is built to provide you with the best tonal experience and dura bility available in a guitar amplifier As with all Oldfields It is hand built with you the player as the central focus of our effor...

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

Page 4: ...oduct may be equipped with a polarized plug one blade wider than the other or a three prong grounded plug This is a safety feature If you are unable to insert the plug into the outlet contact an elect...

Page 5: ...uum tubes until they have sufficiently cooled Oldfield amplifiers are capable of producing very high sound pressure levels which may cause temporary or permanent hearing damage Use care when setting a...

Page 6: ...ranked tone at higher volumes The amp is extremely responsive to your attack and guitar volume Your amp is built to last a lifetime and will give you countless hours of enjoyment whether on stage in t...

Page 7: ...ertones will mix with the tone as well Note Channel 1 and Channel 2 are out of phase with each other and can not be jumper d as a player might do with some other 4 input amplifiers 5 Treble This contr...

Page 8: ...nnel 1 and use the Top Cut control to dial in the tone for that channel The player then has the 3 tone controls available for adjusting the tone of channel 2 while leaving the Top Cut control unchange...

Page 9: ...r Jack An external speaker can be connected to this jack Note A speaker must be connected to one of the speaker jacks at all times Failure to do so will result in serious damage to the unit The combin...

Page 10: ...efore handling tubes Biasing This amplifier is cathode biased Replacing power tubes will not require a rebias ing of the amplifier Replace power tubes only with a matched quad to achieve optimal tone...

Page 11: ...ansformer Output Transformer Reverb Transformer And Choke These items are guaranteed for ten years after date of purchase against manufacturer s defects If a failure occurs due a defect in manufacturi...

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