 The lead channel was voiced so brightly, it is considered to be the most aggressive Mark Series Boogie ever introduced.The presence cap and voltage rating of some of the orange drops in the power section were also altered to mirror that of the IIC+

The final revision was the "Green Stripe" Mark III, which was only available in a Simul-Class format.It was identical to the Blue Stripe, apart from having its overall gain reduced, except for the wiring of the outer two Class A power amp tubes which were switched to Pentode operation instead of Triode for a 10w RMS increase over previous Simul-Class amplifiers (15w/75w) making 25w/85w.