EM4 may refer to :
*
EM4 Electric Trainset
EM4 Electric Trainsets (Cyrillic ''ЭМ4'', known as "Sputnik") were produced from 2003 to 2006 by the JSC "Spetsremont" factory. Their cars have a common interior space. Each car has three pairs of sliding doors propped-designed only for the hig ...
, a Russian multiple unit train carriage
*
EM-4 rifle, an experimental British rifle
* ARC EM4, a model of
ARC embedded microprocessor manufactured by the US company Synopsis
* EM-4, a model of farm tractor manufactured by the Greek company
Malkotsis
* EM-4, a model of
electric mandolin
The electric mandolin is an instrument tuned and played as the mandolin and amplified in similar fashion to an electric guitar.
As with electric guitars, electric mandolins take many forms. Most common is a carved-top eight-string instrument fi ...
manufactured by the Mid-Missouri Mandolin Company
*
EM4 (tube), a
designation for a vacuum tube, of dual-sensitivity, Magic Eye type
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