{"product_id":"marshall-jmp-1959-mk-ii-super-lead-100w-guitar-head-1253788","title":"Marshall JMP 1959 MK II Super Lead 100w Guitar Head  1977","description":"\u003cb\u003eSummary:\u003c\/b\u003e\u003cbr\u003e\u003cb\u003eHead\/Combo\/Cabinet: \u003c\/b\u003eHeads\u003cbr\u003e\u003cb\u003eAmp Electronics: \u003c\/b\u003eTube Amp\u003cbr\u003e\u003cb\u003eWattage Range: \u003c\/b\u003e100-199 Watts\u003cbr\u003e\u003cb\u003ePower Tubes: \u003c\/b\u003eEL34 \/ 6CA7 \/ KT77\u003cbr\u003e\u003cb\u003eTube Details: \u003c\/b\u003e12AX7 (x3), EL34 (x4)\u003cbr\u003e\u003cb\u003eAmplifier Condition: \u003c\/b\u003eAmplifier is in good condition with moderate wear.\u003cbr\u003e\u003cb\u003eAmp Mods\/Repairs: \u003c\/b\u003eNon original bright cap on channel one, EL34's have been installed in place of 6550's, one replaced capacitor in bias circuit. Non-original power cable.\u003cbr\u003e\u003cb\u003eSerial Number: \u003c\/b\u003e04016J\u003cbr\u003e\u003cb\u003eAmp Details: \u003c\/b\u003eAmplifier is mostly original with original transformers, pots, and most of the factory components. Being a North American unit, this amp would have came from the factory with 6550 output tubes, and has since been converted to EL34's for a more traditional Marshall sound. The bright cap on the bright channel volume pot has been lowered to 100pF from 5000pF for a smoother onset of breakup and to tame the high end. One cap in the bias circuit has been replaced, and the power cable is non original. Other than these changes, the amp is a stock mid 70's Super Lead circuit and sounds as such.\u003cbr\u003e","brand":"Marshall","offers":[{"title":"Default Title","offer_id":39440356442247,"sku":"U3357705501","price":2219.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4368\/2183\/products\/marshall-amps-guitar-heads-marshall-jmp-1959-mk-ii-super-lead-100w-guitar-head-1977-u3357705501-28275861094535.jpg?v=1648992551","url":"https:\/\/www.chicagomusicexchange.mom\/products\/marshall-jmp-1959-mk-ii-super-lead-100w-guitar-head-1253788","provider":"Chicago Music Exchange","version":"1.0","type":"link"}