Features :                                        Catalogue   (pdf File)          Go Back

■  Not affected in a noisy place, and can judge at once the polarity of any types of loudspeaker and headphone, suitable in production line.

■  Can be linked with 3 other kinds of instruments ( Model-152A , 7117C and 7116C ).  Only one  person  is  needed  to make  the  operation,  save  labor  and  time .

■  Easy  to  learn,  to  operate,  high  reliability.

■  Has the Positive/Negative indicator extended device, only those Model-139B with serial no. "PLxxxxxxxxx" have this function.  (This extended device must be connected with the Extended Pilot (Model-139BL))

In a HI-FI Stereo System, Loudspeaker & Headphone with a correct polarity is very important.  If the phase ( polarity ) was reversed, HI-FI Stereo’s effectiveness would  be seriously affected.  139B is not affected at all in a noisy place, and can judge at once the polarity of the loudspeaker and headphone. 139B can be connected with 152A, 7117K, 7116C to test 4 parameters.  Only one operator is needed ( see left page ).

139B is suitable for loudspeaker system, loudspeaker, multimedia, monitor, headphone  and  audio firms.