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Marshall Serial Dating Amps Number By

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Marshall amps with a Serial Number: We do not have serial number information on Marshall Amps before The serial number is usually located on the back panel of the chassis but some amplifiers made between had them on the front panel. From July to December , the date letter. Welcome to Vintage Marshall meetgirls.date We specialize in the Sale & Repair of Vintage Amplifiers, Cabinets & Effects. We also provide detailed information on how to date your Amplifier and Speakers etc. Please feel free to email us with any questions you may have at: [email protected] Thank you for. The serial number on your Amp is located on the back panel of the chassis. Some amplifiers made between have them on the front panel. January - June These are more difficult to date than post amps. The best way to estimate the year is by looking at the cosmetics and certain electronic.

Dating a Marshall amplifier can be a daunting task for even the most savvy of suitors — Amp Archives is here to help.

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The earliest Marshall amplifiers were made in and had no model or serial numbers. From until Marshall amplifiers were identified by a four-digit sequential number inside the back panel, reportedly starting with in and reaching at the beginning of Beginning in Marshall abandoned the four-digit numbering system and began using model numbers, sometimes called series numbers and model codes.

While there are serial-like numbers during this era, no standard serial number format has been identified. The model numbers can be somewhat confusing because model numbers such as or can be mistakenly Dating Marshall Amps By Serial Number as the production year of the amplifier. Amplifiers from this era must be dated within this time span based on their features, or component manufacturers and codes, including speakers, potentiometers and transformers.

The model number takes the form of four-digits preceded or followed by letter codes describing amplifiers characteristics.

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The table below outlines the meaning of these letter codes. The full identifier of these amps was initially comprised of a model code, the serial production number and the date code.

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Letters were used as date codes to represent the year of production and this letter followed the serial production number. Letters B, I, O and Q were not used to avoid confusing letters with numbers.

All Marshall amps originally came with Celestion speakers, so in cases where the speakers are original, speaker date codes can be used to date earlier amps. Amps from this era still have the block-style Marshall logo and a centered chassis. Possible values are shown in the table below. Larger black cabinet feet circa July '69 earlier feet were small and gray. January June - Serialization unknown from this period, but model codes are known.

Starting in the date code letter was moved from the end to the middle of the production code, between the model code and the production number. In October of Marshall began using stickers printed with serial numbers and bar codes. These were comprised of nine digits in the format of xx-xxxxx-xx though not always.

These serial numbers can be decoded as follows:. In August of Marshall switched to their current serial number format which contains more information and is easily decoded. These are printed on a sticker and affixed to the back of the amplifier and are comprised of a letter followed by ten numbers followed by another letter: Checking against other amps from the era as well as component markings speakers, potentiometers, transformers can help to confirm a year of production.

You must be logged in to post a comment. Marshall amplifier serial numbers made simple Posted on April 25, April 27, by Phil by Phil. JTM block logos changed to gold-plated plastic script, these are fragile and many have been replaced.

Cabinet feet are small round and gray.

Dating Marshall Amps By Serial Number

Handles changed to plastic with larger end cap. Power tubes are KT66, 6L6 and Single W Drake transformer, rated at ohms, part numberfor W models. Single 50W Drake output transformers rated at 3, ohms, part numberfor 50W models.

Dating Marshall Amps By Serial Number

GZ34 rectifier no longer used. Cabinets have corner-lock joints with a quality control signature inside. Gold Plexigas back panel, changed from cream-colored.

Dagnall transformers used in the JTM, changed from Drake. Chassis construction transitions from aluminum to steel in late First Watt Majors appeared, with treble, bass and volume controls, active tone circuitry and KT88 tubes.

InMarshall started using both model codes and serial numbers, which are listed here. M - England C - China I - India K - Korea The next four digits indicate the complete four digit year of production between andsome models produced overseas may only have a two digit year. Cabinet feet are small round and gray. I had recorded and played through the 's a few times and really liked the DSL which sounds much fatter and more focused then the TSL. As a result, dating cabs can be more art than science.

The watt Major was modified to match the normal panel layout and the active electronics where dropped. The output transformer turned 90 degrees in comparison to earlier models to reduce hum. Larger black cabinet feet starting in Julychanged from small and gray. Welcome Dumble Amplifiers to the Amp Archives.

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