{"product_id":"marshall-jmp-2203-mk2-master-model-lead-100-watt-guitar-amp-head-1977-serviced-rev-98676215","title":"Marshall JMP 2203 Mk2 Master Model Lead 100-Watt Guitar Amp Head 1977 - Serviced","description":"\u003cp\u003e\u003cb\u003e\u003cstrong\u003eMarshall \u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003eJMP 2203\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003e1977 Master Model 100 Watt Lead\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003eFully Serviced\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eAn excellent example of a first-generation Marshall JMP 2203 Master Model Lead from 1977, one of the earliest and most desirable versions of the amplifier that would go on to define rock guitar for decades to come.\u003c\/p\u003e\u003cp\u003eIntroduced in 1975, the 2203 revolutionised the Marshall lineup by introducing a true master volume design, allowing players to achieve rich valve overdrive without having to run the amplifier completely flat out. By 1977, the 2203 had become the choice of countless touring musicians thanks to its incredible punch, clarity and reliability.\u003c\/p\u003e\u003cp\u003eBuilt during Marshall’s highly regarded late-‘70s period, this UK-made head delivers everything you’d expect from an original JMP—huge dynamic range, crushing midrange, tight low end and the unmistakable roar that has appeared on thousands of recordings.\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eModel: JMP 2203 Master Model Lead\u003c\/li\u003e\n\u003cli\u003eYear: 1977\u003c\/li\u003e\n\u003cli\u003eSerial Number: S\/A 07681J\u003c\/li\u003e\n\u003cli\u003eInspection Sticker Date: 31\/10\/1977\u003c\/li\u003e\n\u003cli\u003eOutput: 100 Watts\u003c\/li\u003e\n\u003cli\u003eAll original iron - Mains, Output \u0026amp; Choke\u003c\/li\u003e\n\u003cli\u003ePower Valves: 4 x EL34 - OEM Marshall\u003c\/li\u003e\n\u003cli\u003ePreamp Valves: 3 x ECC83 \/ 12AX7\u003c\/li\u003e\n\u003cli\u003eChannels: Single Channel\u003c\/li\u003e\n\u003cli\u003eInputs: High \u0026amp; Low Sensitivity\u003c\/li\u003e\n\u003cli\u003eControls: Pre-Amp Volume, Master Volume, Presence, Bass, Middle, Treble\u003c\/li\u003e\n\u003cli\u003eImpedance Selector: 4Ω \/ 8Ω \/ 16Ω\u003c\/li\u003e\n\u003cli\u003eConstruction: UK-built PCB construction with flying leads\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003eService Work\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFully inspected and serviced by Dave Wittering at Prestige Amp Servicing.\u003c\/li\u003e\n\u003cli\u003eDave is a former Marshall Senior Service Engineer with over 15 years at the Marshall factory.\u003c\/li\u003e\n\u003cli\u003eV1 Grid Mod - to stop oscillation \u003c\/li\u003e\n\u003cli\u003eBias circuit capacitors\u003c\/li\u003e\n\u003cli\u003eAll pots replaced\u003c\/li\u003e\n\u003cli\u003eAll sockets replaced\u003c\/li\u003e\n\u003cli\u003eDedicated chassis earth\u003c\/li\u003e\n\u003cli\u003eMains fuse holder replaced - NOS\u003c\/li\u003e\n\u003cli\u003eMains \u0026amp; Ohms selectors serviced\u003c\/li\u003e\n\u003cli\u003eAll parts used are OEM Marshall where possible\u003c\/li\u003e\n\u003cli\u003eReady for immediate studio, rehearsal or stage use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003eTone\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eThe late-’70s 2203 is one of the definitive Marshall amplifiers. It combines the authority and headroom of a 100-watt Super Lead with the added flexibility of a master volume circuit, creating an amplifier that can move effortlessly from articulate classic rock to aggressive hard rock and early heavy metal.\u003c\/p\u003e\u003cp\u003eExpect tight, percussive bass response, aggressive upper mids and exceptional note definition. The amplifier remains incredibly responsive to picking dynamics and cleans up beautifully from the guitar’s volume control, while turning up the preamp delivers the rich harmonic overdrive that has made the 2203 legendary.\u003c\/p\u003e\u003cp\u003eA boost pedal in front unlocks the saturated tones that became synonymous with the New Wave of British Heavy Metal, early thrash and countless arena rock recordings.\u003c\/p\u003e\u003cp\u003eThis is the unmistakable sound of a late-’70s Marshall at its absolute best.\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003ePresented in very good vintage condition with honest cosmetic wear consistent with nearly 50 years of use. The amplifier retains plenty of original character and has clearly been enjoyed throughout its life.\u003c\/p\u003e\u003cp\u003eA previous owner had fitted an aftermarket effects loop. This has since been professionally removed and the circuit restored to standard factory specification. The only evidence remaining is two neatly positioned holes in the rear panel where the loop controls were previously mounted. They have no effect on the amplifier’s performance or reliability and are reflected in the price.\u003c\/p\u003e\u003cp\u003ePlease study the photographs carefully as they form part of the description.\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003eWorldwide Shipping\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eAll of our amplifiers are shipped in custom Overdrive Guitars boxes with extensive internal protection. We regularly ship vintage Marshall amplifiers worldwide using UPS and DHL, with fully tracked and insured delivery. Valves are carefully packed and secured for transport.\u003c\/p\u003e\u003cp\u003eWe are proud to be an Authorised Marshall Retailer and Marshall specialists, with a dedicated showroom where you can experience and test our amplifiers in person by appointment.\u003c\/p\u003e","brand":"Marshall","offers":[{"title":"Default Title","offer_id":53664680051024,"sku":"0154","price":2299.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0944\/0919\/5856\/files\/a14d6ca1-cf66-4490-a0f1-2d898f08b1b0.jpg?v=1789895446","url":"https:\/\/overdriveguitars.com\/products\/marshall-jmp-2203-mk2-master-model-lead-100-watt-guitar-amp-head-1977-serviced-rev-98676215","provider":"Overdrive Guitars","version":"1.0","type":"link"}