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a mfierseItn vh feaarncsdti,of utnhl eo fo tfhfsee sJte Th Mheea4ad5d wsm aaysn cdtho cema bpianeyt sm waedre aenvde ro nly constructed. thaat mthIpen' shc aecasheda sybsoaiusla nwarcaees dw o pofrnsodepete rlriinklyge w,t hthhiesen wr ecaaassrotioen d ht.he elp ensure Despite heaimdqmhuaaelrdAftsi eatfraetsecwb lkiey nsye l p eonMclao aabridkcmlsuti eos oieadltcnfd hg bo iaieoKtnav eiccegponyekr rn henna teihdecetn rae tsotatiod ,hcflM l saEaytm hlatn ei ptreymgvysls ela phaoeorcona sfesl sdtldtxi sh.npM t ecircessehueo smad!spi seeoleesusnl yiim psg a,rrn n aeas drfhtoee oo Ir t owruhefraefd stv ’etseht r he, o wswyem wqmuei’cevkterl iyc al Since then, al favwouhroa bhlayv -e nsoete no nalny do nh eiatsr du niti qhuaev el ocookms mbuetn atelsdo m oons itt s rich, fierce, majestic tone. ofeTro s coemleebtrhaitneg t htreu ldya swpne coifa la -n heewn ccee nthtuisry r eI iwsaunet.e d to To comhapvomen asekoneut stg hahinst dou unmti qeautnhedo pdrresop odrofu dctou ncaesd tar uacltlht ioeofn tt hiwce ea o sur sipgeoidns asbli abclek, we in 1962. in aFnro amlu mthien ihuamn dc-hwaisresdis ,t athgr-obuogarhd t oci rtchuei to hrioguinsaeld s ilver Celestion Alnico loudspeakers. We have even youo fw tIih tshei ncfricoreesusrtune Mrtlylreea shcrssote hphdaeo l tlut hharesam too ptrfhli igpfisiilen aeraysyli ne‘c-gvco eapfrftl icemnha’s ailnudogreg e,or .ew !i silsl uperovfi doen e I'm sure it will. I'm also sure it wil prove to be a quite a conversation piece too! From the Chairman Congratulations on your purchase of the limited edition reissue of the offset JTM45 halfstack. The original versions of this amp and cabinet were built back in 1962, the very year in which Marshall Amplification was born. In fact, the offset head was the first version of the JTM45 my company made and only a mere handful of these heads and cabinets were ever constructed. In case you are wondering, the reason the amp's chassis was offset like this was to help ensure that the head balanced properly when carried. Despite the practicality of this design however, we quickly discovered that most people preferred the symmetrical look of a centrally placed chassis, so that’s how we’ve been building heads ever since! A few years ago one of these extremely rare offset halfstacks came back into my possession and I immediately placed it in the Marshall Museum at our headquarters in Milton Keynes, England. Since then, all who have seen and heard it have commented most favourably - not only on its unique looks but also on its rich, fierce, majestic tone. To celebrate the dawn of a new century I wanted to offer something truly special - hence this reissue. To make this unique product as authentic as possible, we have sought out and reproduced all of the original components and methods of construction we used back in 1962. From the hand-wired tag-board circuit housed in an aluminium chassis, through to the original silver Celestion Alnico loudspeakers. We have even resurrected the original ‘coffin’ logo! I sincerely hope that this eye-catching reissue of one of the first Marshall amplifiers ever made, will provide you with countless hours of playing pleasure. I'm sure it will. I'm also sure it will prove to be a quite a conversation piece too! WARNING! Please read the following A. ALWAYS use the correct power cord B. NEVER attempt to by-pass the fuses or C. NEVER attempt to replace fuses or valves D. DO NOT attempt to remove the amplifier chassis, E. ALWAYS have this equipment serviced or repaired F. NEVER use an amplifier in damp or wet conditions. G. DO NOT switch the amplifier on without the loudspeaker H. ENSURE that any extension cabinets used are of the correct impedance. I. PLEASE read this instruction manual carefully before switching WARNING : This apparatus must be earthed! WARNING : Do not obstruct ventilation grille and always ensure free movement ! KEEP THESE INSTRUCTIONS Introduction As Jim has already stated, our goal, when building this limited edition, offset reissue, close to the original as humanly possible! To this end we have gone to great lengths to recreate every single aspect and specification of this visually and aurally striking item-from sourcing an exact replica of called because it was first made for us by a coffin manufacturer!), to ensuring that the output boast the same exact core lamination materials as they did back in 1962. Likewise, the amplifier circuit itself is hand-wired on a hand-built tagboard, the chassis is constructed from aluminium and the valve complement in the preamp, a GZ34 rectifier and a pair of KT66s in the power amp - just like the original. We are delighted to report that many of our suppliers went to the same exacting lengths as we did when us with parts for this reissue, and none-more-so than Celestion. Thanks to their commitment to this project they successfully recreated the Alnico magnet, silver G12, model T0652 loudspeakers found in our museum piece-right the way down to matching the same exa...