I'm comparing the two principle versions of the Vintage 1967-1981 Hiwatt DR103 (Custom Hiwatt 100): The 4-input vs the 2-input! We'll look at earlier DR103 (possible non MW) later on too.
Gear:
1976 Hiwatt DR103 4-input
1981 Hiwatt DR103 2 input
1973 Fender Stratocaster
4x12 with 2xFane Crescendo 100W Pulsonic Speakers
2xSM57 close mics
2xBeta57A room/hall mics