Marshall 50w 1973 – Modded JTM45/JCM800


I bought this in Nov 2014 as a replacement for my 1974 standard Artiste. The circuit board on my '74 was a PCB and I'd read that 73/74 was a transition period - the '73 & earlier models having a turret board, which was ideal as a platform to 're-arrange' the stock components into a JTM45 circuit. When this one came up, already modded by Matt Sampson of Bristol, it was a no brainer.

"A really unique Marshall conversion. The only one of it's kind that I know of!
Originally a 1973 Marshall Artiste combo this has been expertly converted into a JTM45 AND a JCM800 combo in one!!! I had this amp custom converted by the genius that is Matt Sampson of BinkBonk studios in Bristol. 
Using all of the original components and utilising the 2 separate sides of the amp Matt was able to convert this into 2 amps in one. The cab is rock solid, as is the grille cloth and all of the working parts. The tolex on the front right has been torn and looks just right for it's age. The speakers are original 1973 Celestion Greenbacks which are worth £500 alone!!!  The JTM45 side sounds so creamy it really has to be heard to be believed, and the JCM800 side has just that bit more ballsy gain. Perfect for classic rock. Think Peter Green on one side and Marc Bolan on the other. This will suit any traditional Marshall lover down to the ground!"

I swapped out the original Celestions and fitted these reissues as I felt they sounded a little tighter & punchier.

Celestion G12M Greenback & Celestion Vintage 30


Celestion G12M Greenback

The G12M Greenback has evolved over the decades but still retains its essential, sought- after tone.Angus Young has been a Greenback devotee since the early days of AC/DC. This model is voiced with additional broad mid-range attack and restrained top-end to give a forward, punchy attitude to chords and a searing lead tone without fizz.With its well-controlled low-end it can be used singly in low-powered amps, or in multiples for high-power rock heads. It's an ideal speaker to bring drive and definition to modern high gain amps.

Celestion Vintage 30

Back in 1986 a new breed of hard rock player was on the rise. To meet the demands of the players and their increasingly 'hot-rodded' amplifiers, we set out to develop a modern speaker, capable of handling much more power and overdrive. To achieve this, we coupled our 'H' magnet (the closest in performance to Alnico) with a new cone and voice coil employing contemporary materials.

Our most revealing speaker, the Vintage 30 features enormously detailed and complex overtones, a warm low-end, a famously rich vocal mid-range and a beautifully detailed top-end. Used singly to reveal the complexities in hand- wired boutique amps, or in quartets for a wonderfully intricate vintage 3D crunch, the Vintage 30 sound has been captured on thousands of recordings from a diverse range of notable players including Slash, Steve Stevens and Peter Frampton.

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