Firma elvetiana Nagra-Kudelski e recunoscuta pt magnetofoanele profesionale (de dimensiuni reduse) apreciate pe tot mapamondul; cele doar 2 tipuri de casetofoane fabricate intre 1984 -1987 – Nagra JBR = un recorder de buzunar si Nagra PS-1 = player-ul prezentat aici avand calitati tehnice deosebite au fost realizate la cererea si destinate autoritatilor; de aceea productia a fost de doar cateva sute de unitati, iar pretul – ridicat (mii USD). Conceptia electronica a acestui player este modulara, traseul benzii este asimetric si prelungit pt reducerea variatiilor de viteza si ofera facilitati in scopul obtinerii unui sunet de calitate – mai multe filtre/reglaje, lipsa volantului, rolei presoare si viteza controlata electronic si variabila. Banda casetei este identica cu cea a casetei clasice tip Philips, dar cinematica este diferita. Cateva caracteristici tehnice: raport semnal/zgomot = 59 db (standard) si 74 db (expandat); distorsiuni “wow/flutter” = < 0,3%; gama de frecvente audio: 170 – 4500 Hz; 2 motoare; functioneaza si cu baterii, la 18 V ; dimensiuni : 343 x 243 x 120 mm.    

The Swiss company Nagra-Kudelski is recognized for professional tape recorders (small size) appreciated all over the world; the only 2 types of cassette devices manufactured between 1984 -1987 - Nagra JBR = a pocket recorder and Nagra PS-1 = the player presented here having special technical qualities were made on request and intended for the authorities; that is why the production was only a few hundred units, and the price - high (thousands of USD). The electronic design of this player is modular, the band path is asymmetrical and extended to reduce speed variations and offers facilities for quality sound - more filters / settings, no flywheel, press roller and electronically and variable speed controlled. The tape is identical to that of the classic Philips compact-cassette, but the kinematics is different. Some technical features: signal / noise ratio = 59 db (standard) and 74 db (expanded); wow / flutter distortion = <0.3%; audio frequency range: 170 - 4500 Hz; 2 motors; also works with batteries, at 18 V; dimensions: 343 x 243 x 120 mm.