Motorola Mobility LLC T56KT1 Manual Do Utilizador

 shows a differential speaker circuit, 

 shows a single-ended speaker circuit 

and 

 gives the speaker specifications.

For safety regulations it is important to place series resistors on the speaker output 
lines, as illustrated in 

. The resistors value should be R = 0

Ω

 at the 

design stage, but may be changed to a different value during audio safety testing, in 
case speaker level limitation is required.