Yeah its an egnater type amp as bruce invented MTS, but the stack in the picture is a randall MTS head and cabs that are Randall MTS amps n cabs... and its the RM100SI which is the scott ian signature amp and in a recent gear run down he was going through his rig and ow and behold he was still running the randall mts amp.
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Im into MTS deeply 2 heads an RM50 and an RM100, 1 Rm50 Combo and 1 RM4 Preamp and 12 preamp modules! and I love it all!
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Got a "real" amp on the way a Jcm 2000 TSL 100 head