"If anything, the current Henry sounds more like the older ones."
Are you insane?
It sounds NOTHING like the older Numatics! It sounds more like the 1996-1998 1100w single fan motor Henry's that had the coloured outline lettering.
These new Henry's have a cheapy all plastic single fan motor.
The older Henry's from 1981-1995 had twin fan motors with prior 1990 models having an 800w motor and 90-95 having 1000w motors and both sounded nothing like these new models.
Numatic began to cheapen Henrys in around 1996 when they introduced an 1100w single fan motor, then in 99-2003 an even cheaper, smaller motor, again single fan and still rated at 1100w.
In 2004, Numatic re introduced a twin fan motor in Henry cleaners, this particular motor known as the "twinflo" motor, that was 1200w and was used in the push button with hi/lo switch, double rocker on/off/hi/lo, on the top back and the Autosave variants.
For some reason and for the first time, Numatic have gone to an all plastic, motor, but single fan, like the mid 90s variants, it is also significantly smaller than the predecessor, the 1200w "twinflo" motor and is not as easily serviceable.
Alex.