Conducted 17 experiments with adult ss (n = 383) using stimulus suffix effect (sse) to determine the properties of the precategorical acoustic store (pas) described by R. Crowder and J. Morton (see pa, vol. 43:15225). The sse is described as a selective impairment of recall of the final items in a serial recall list engendered by a redundant acoustic event following acoustic presentation. It is established that such intrinsic properties of the suffix as its meaning, frequency of occurrence, and emotionality have no bearing on the size of the suffix effect. This confirms the precategorical nature of the store. It is also shown that variation in the acoustic properties of the suffix (e.g., its apparent spatial location, timbre, and pitch) with respect to the stimuli reduces the size of the sse. Variations on this theme indicate that pas is located after a mechanism of selection between acoustic channels and before the convergence of acoustic and visual analysis systems. (33 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)