Summary A test was conducted to compare pseudo 2-D data acquired using a conventional six-element-array (six industry-standard geophones inline in series) and a high-sensitivity single geophone in a side-by-side geometry. The main results of the test are as follows: (1) the average signal-to-noise ratio was 3.3 dB higher for the array than for the single sensor; (2) this improvement is due to reduced noise from the array, not due to enhanced signal; (3) greater bandwidth was observed in the single sensor data, but given the shooting geometry, the location, and the target depth, this increased bandwidth was all noise; (4) the wavelet bandwidth and phase were similar between the array data and the single sensor data; (5) when the number of geophones in the array was incrementally increased from 1 to 2 to … 6, the signal-to-noise ratio increased incrementally to a maximum of 3.6 dB; (6) after brute stack (in which only velocity analysis was done), there was no discernable difference in the geophone group data and the single-sensor data at the test location, given the conditions imposed by the test geometry.