Description Product Description What do you get when you cross decades of tone expertise with 21st-century tech? You get Marshall's fantastic JMD:1 Series, that's what! These amps are 100% Marshall, indeed, packed with sheer EL34 tube power. But the secret behind the series is in the collaboration between Marshall and Swedish software gurus Softube. The two companies dreamed up state-of-the-art digital preamplifier technology, so you can plug into more tonal possibilities than ever before.