NAM Amp Pack 10 - 1989 JCM 50W NAM and not quite as loose

and not quite as loose as the original 5150

as well as several models aimed at single coil pickups and the low input channel

Iron Maiden etc

Several load boxes and real cabinets have been used to capture varying responses from the power amp section (which has no negative feedback so is VERY sensitive to the load)

27 Direct NAM models of a Krank Revolution Series One amplifier

NAM Amp Pack 10 - 1989 JCM 50W NAM and not quite as loose15 Direct NAM models of a Marshall JCM800 2204 from 1989. These NAM models are captured from a later build of the 2204, and has recently been serviced by Marshall. Its one of the loudest 50W amps I've ever heard and absolutely roars. The later horizontal 2204's seem to get a slightly worse rep online for some reason Marshall did tinker with the filter cap arrangement and preamp voltages but its a subtle tweak that is quite hard to perceive and