In article , Trevor Wilson
wrote:
I ran the impedance curve of the infamous Infinity 4.5 many years ago,
but it was long before computerised test equipment and the curve
(primitive that it was) has long since vanished. The impedance fell to
around 0.75 Ohms in the bass region. I'll dig out the crossover
schematic provide a link. Be very careful when you examine it. Make
certain you are sitting down with a nice cool beverage (alcoholic). It
is a truly scary stuff.

This was the kind of dilemma faced by amp designers of the period. A
variety of highly regarded ( or at least highly hyped! ;- ) 'super
speakers' appeared. Some needed a hell of an amplifier to drive them
because they were inefficient had awful impedance behaviour. Yet others
could be toasted by an amp designed to drive the awkward squad. Limiting
the amp then limited its use.

Jim

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