How powerful were the Cessna O-2B's loudspeakers?

Short answer

One of the O-2Bs, the example preserved today in a museum, carried an amplified 1,800 W loudspeaker system weighing 300 lb. Some aircraft of the O-2 family mounted three 600 W loudspeakers with propaganda canisters. With loudspeakers and a leaflet dispenser, the O-2B flew psychological warfare missions in Vietnam.

Published: November 1, 2026 · Updated: November 1, 2026 · Edited by Above Ten Thousand · Editorial policy

How powerful were the Cessna O-2B's loudspeakers?

O-2A “SkymasterEric Friedebach (CC BY), vía commons

1,800 W on board

One of the O-2Bs, the example preserved today in a museum, was fitted with an amplified loudspeaker system of 1,800 W weighing 300 lb. Some aircraft of the O-2 family mounted three amplified 600 W loudspeakers, accompanied by propaganda canisters for psychological operations. In the general description of the aircraft, the O-2B carried loudspeakers and a propaganda dispenser for that task.

An adapted light aircraft

The O-2B derived from the civil Cessna 337: 31 aircraft were converted. The cabin was fitted with tandem seats for pilot and observer in place of the six seats of the civil version. The aircraft carried no armament.

What was broadcast and what was dropped

With its loudspeakers and its dispenser, the O-2B was used in the psychological warfare role in Vietnam. The propaganda dropped by the museum's example included a wide variety of messages, some instructional, but above all warnings of imminent defoliation flights or appeals to enemy troops to lay down their arms. Among the operators of the O-2B was the 14th Special Operations Wing, at Nha Trang Air Base in Vietnam.