 Separate magnetic and analog optical audio heads are built into the mechanism itself, enabling all 5/70 magnetic and 4/35 optical formats to be projected without the need to adjust or replace any audio components.The change of gauge is done by swapping some gate components, pad roller assemblies, reel spindles and the lens, and in some cases making minor adjustments to the lamphouse.This procedure can be completed by a competent projectionist in 5–10 minutes, which is a major reason for the DP70's popularity with venues that show 4/35 and 5/70 prints interchangeably.