Kudelski社は、1951年にStefan Kudelski(1929年2月27日生)によって設立。
その年には彼の素晴らしい発明 "NAGRA"(ポーランド語で「will record」)は、既に具体的な形態を確立していました。
それは優れた仕様の、軽くて小さい携帯用で高い品質の、携帯用のオーディオ・テープレコーダへと・・・。
NAGRA I
first model
1951
NAGRA II
second model
1953

NAGRA III
mono audio recorder
1958
NAGRA 4.2
mono audio recorder
1970
NAGRA IV-S
stereo machine for the music industry
1972

NAGRA IV-SJ
for a multitude of different environmental and industrialization applications
1972
NAGRA SN
1/8" width reel to reel recorder
1972
NAGRA IS(Idioten Sicher)
twin speed(IS-T), pilot(IS-L)
1974

NAGRA E
single speed and microphone recorder
1976
NAGRA FAX
weather faxcimile system
1977
NAGRA T-AUDIO Studio
twin capstan recorder for studio
1978

NAGRA VPR
rotaly head recorder
1983
NAGRA JBR
special cassette recorder
1984
NAGRA PS-1
playback unit for JBR
1986

NAGRA T-AUDIO Time code version
universal syncronization recorder
1984
NAGRA D
digital tape recorder
1992
ARES-C and C-PP
memory card recorder
(for portable: ARES-C), (for studio: C-PP)
1995

PL-P Pre Amp
vacume tube pre amplifires
1997
VPA Pwer Amp
mono-block vacume tube power amplifieres
1997
MPA Pwer Amp
solid-state amplifieres
1999

ARES-P/RCX220
pocket virsion of ARES-C
1999
PL-L
line input pre-amplifier
2001
NAGRA V
DAT recorder
2002

DAC
high quality D/A converter
2003
ARES-PII
FAT16 and linear PCM recording in the WAV file format
2003
ARES-BB
over-the-shoulder version of the ARES-PII
2003

NAGRA V-PP
portable hard disk recorder
2003
ARES-PMA
mono-block power amplifieres
PMA(mono), PSA(stereo)
2005
ARES-B+ and PII+
replaced by the PII+ and BB+ versions
(rarger internal memory)
2005

ARES-M
ultra-miniature hand-held recorder
with a built-in 1GB memory
2005
CD player is available in three forms.
CDC (with Contrl Amp)
CDP (CD Player)
CDT (only CD Transport)
2007