This article is from the Star Trek Tech FAQ, by Joshua Bell inexorabletash@hotmail.com with numerous contributions by others.
The Borg probably have subspace field generators (redundantly)
scattered throughout their cube; they can then pulse them to generate
*massive* overlapping, pulsating subspace fields in any direction.
Same technique, more power, more flexibility.
As for Ferengi, perhaps they use shielding. One thing is certain; the
design of Ferengi ships allows for the ship to be contained in a
single lobed warp field. The Enterprise requires a double lobe. Having
"inboard" warp drives (like the Bird of Prey) gets you a fast ship for
less power; likely, shielding can prevent the fields from frying the
crew.
A display screen in "Blood Oath" [DS9] may show the warp field of the
Bird of Prey - again, a single lobe.
Something to consider; most of the small ships (picture the raiding
ship from "Gambit" [TNG]) don't have outboard drives. They probably
make the single-lobe/shielding tradeoff to keep their ships small,
fast and cheap. Ditto for shuttles with warp.
 
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