Meyer Sound’s SIM 1 & SIM 2 were stepping stones that brought us out of the stone age & into modern sound system design & optimization. SIM stands for “Source Independent Measurement”. The current version is SIM 3. All SIM platforms are based around a stand alone hardware / software system. The following is taken directly from Meyer Sound’s own website.
SIM 3 – 2003SIM 3 launches, representing a major advance, greatly increased power and added features at a fraction of the original size and cost.
SIM 2 – 1992The SIM II FFT analyzer, released in 1991, receives the prestigious R&D 100 Award from R&D Magazine, for such innovations as its three simultaneous transfer functions.
SIM 2 has long since been discontinued but is still found on work benches. Here is a link to the SIM 2 website.
SIM 2 webpage