Informations from SynthMuseum site: Still 12-bit sampling and 8-voice polyphony, the S950 is an upgraded S900 increasing the sampling rate to 48kHz and the internal RAM capacity to 2.25MB (unlike the S900 its stock 750KB RAM was upgradable), and adding such functions as cross-fade looping, and pre-trigger recording. The front panel is identical to the S900

Akai S 950 (SynthMuseum)