Panasonic-Technics                            
Model (see top page for legend)
Year
Heads
F.R.,
±3dB, Hz-kHz
W&F, WRMS,
%
S/N, NR
off, dB
S/N, Best NR,
dB
NR & Bias
Rec. Cal.
Auto
Reverse
Drive
Motors
Weight, kg
Price, MSRP,
USD
Notes
RS-275US
1971 2 30-15
0.2 50   No
No
No
Open
1 8.2 250 Direct drive
RS-277US
1972 2 20-14
0.25 54 60 B
No
Yes
Open
1 6.4 300  
RS-276US
1972 2 20-17
0.1 55 60 B
Manual
No
Open
1 8.6 400  
RS-279US
1973 3 20-16
0.1 50 59 B
Manual
No
Open
2 9.1 500  
RS-271US
1973 2 20-14
0.15 54 59 B
No
No
Open
1 6.2 250  
RS-676US
1974 2 40-13
0.08 50 58 B/FM
Manual
No
Open
2 10.4 460  
RS-610US
1974 2 50-12
0.15 49 57 B
No
No
Open
1 6.0 250  
RS-263AUS
1975 2 30-14
0.15 49 57 B
No
No
Open
1 4.6 200  
RS-677US
1976 2 30-17
0.07 52 65 B/FM
Manual
No
Open
2 12.0 500  
RS-671AUS
1976 2 30-17
0.075 52 62 B
No
No
Open
2 9.4 400  
RS-640US
1976 2 30-16
0.08 51 64 B
No
No
Open
1 5.8 349  
RS-630US
1976 2 30-16
0.09 50 63 B
No
No
Open
1 7.9 260  
RS-625US
1976 2 40-13
0.1 49 57 B
No
No
Open
1 6.0 299  
RS-9900US
1977 3 25-20
0.04 57 67 B/FM
Manual
No
Closed
3 24.0 1,600 Two chassis construction
RS-7500US
1977 3 25-22
0.06 60   No
Manual
No
Closed
1 14.0 680 Elcaset
RS-686DS
1977 3 50-16
0.07 56 66 B
No
No
Open
1 2.8 650 Portable
RS-678US
1977 2 20-18
0.06 52 62 B
No
No
Open
2 10.0 500  
RS-646DS
1977 2 50-14
0.1 56 66 B
No
No
Open
1 5.0 320 Portable
RS-M95
1978 3 20-20
0.03 60 70 B
Manual
No
Open
2 12.0 1,400  
RS-M85
1978 2 30-16
0.035 59 69 B
Manual
No
Open
2 10.5 650  
RS-M75
1978 2 30-16
0.035 59 69 B
Manual
No
Open
2 10.5 600  
RS-M65
1978 2 20-18
0.035 59 69 B
Manual
No
Open
2 7.1 550  
RS-631
1978 2 30-17
0.06 57 67 B
No
No
Open
1 7.8 300  
RS-M85MK2
1979 2 20-20
0.035 59 69 B
Manual
No
Open
2 10.5 750  
RS-M68
1979 2 30-15
0.06 57 67 B
No
Yes
Open
1 10.9 500  
RS-M63
1979 3 30-17
0.05 57 67 B
Manual
No
Open
1 6.3 380  
RS-M56
1979 2 40-14
0.045 57 67 B
Manual
No
Open
1 8.2 500  
RS-M44
1979 2 30-17
0.05 57 67 B
Manual
No
Open
1 6.7 400  
RS-M33
1979 2 30-17
0.05 57 67 B
No
No
Open
1 6.7 350  
RS-M22
1979 2 30-16
0.05 57 67 B
No
No
Open
1 6.7 300  
RS-288
1979 2 20-18
0.056 58 68 B
Manual
No
Open
2 9.5 480  
RS-M51
1980 2 20-18
0.045 57 67 B
No
No
Open
1 6.0 420  
RS-M45
1980 2 20-20
0.035 58 68 B
No
No
Open
2 6.1 375  
RS-M24
1980 2 20-18
0.05 57 67 B
No
No
Open
1 5.0 260  
RS-M04
1980 2 20-18
0.05 57 67 B
No
No
Open
1 4.1 320  
RS-M02
1980 2 20-20
0.035 58 68 B
No
No
Open
2 5.5 500  
RS-M280
1981 3 18-22
0.024 60 70 B
Manual
No
Closed
3 6.3 800  
RS-M270X
1981 2 20-20
0.035 58 92 B/D
No
No
Open
2 6.2 500  
RS-M260
1981 3 20-20
0.05 57 67 B
No
No
Open
1 5.3 380  
RS-M250
1981 2 20-20
0.04 57 67 B
No
No
Open
1 5.3 350  
RS-M240X
1981 2 20-18
0.048 57 91 B/D
No
No
Open
1 4.6 350  
RS-M273
1982 3 20-20
0.037 59 69 B
Manual
No
Open
2 6.5 550  
RS-M263
1982 2 20-20
0.048 58 68 B
Manual
No
Open
1 6.5 350  
RS-M258R
1982 4 20-19
0.07 57 67 B
No
Yes
Open
1 5.8 400 Quick auto reverse, 2 erase heads
RS-M253X
1982 3 20-22
0.04 60 92 B/C/D
Manual
No
Open
2 5.3 450  
RS-M275X
1983 2 20-20
0.03 58 92 B/C/D
Manual
No
Open
3 6.5 600  
RS-M265X
1983 2 20-20
0.03 58 92 B/C/D
No
No
Open
2 6.4 550  
RS-M255X
1983 2 20-20
0.038 58 92 B/D
No
No
Open
2 6.0 380  
RS-M245X
1983 2 20-20
0.045 57 92 B/C/D
No
No
Open
2 5.1 330  
RS-B78R
1984 2 30-19
0.045 58 92 B/C/D
No
Yes
Open
3 5.3 400 Quick auto reverse
RS-B68R
1984 2 30-19
0.05 57 92 B/C/D
No
Yes
Open
2 5.0 330 Quick auto reverse
RS-B50
1984 2 20-20
0.045 58 92 B/C/D
No
No
Open
2 4.5 230  
RS-B100
1984 3 20-23
0.022 60 92 B/C/D
Manual
No
Closed
2 5.6 800 Phase compensation, Discrete 3-head
RS-B85
1986 3 30-20
0.05 60 92 B/C/D
Manual
No
Open
2 5.2 600  
RS-B49R
1986 2 30-17
0.08 57 92 B/C/D
No
Yes
Open
1 3.7 290 Quick auto reverse
RS-B207
1986 2 20-15
0.08 57 92 B/C/D
No
No
Open
2 3.4 225  
RS-B905
1987 3 20-22
0.04 57 92 B/C/D/H
Manual
No
Closed
2 5.0 650  
RS-B705
1987 3 20-21
0.05 57 75 B/C/H
Manual
No
Open
2 4.4 550  
RS-B605
1987 2 20-17
0.06 56 92 B/C/D/H
No
No
Open
2 4.3 470  
RS-B608R
1988 2 30-18
0.08 56 92 B/C/D/H
No
Yes
Open
2 4.3 470  
RS-B755
1989 3 20-21
0.05 57 74 B/C/H
Manual
No
Open
3 5.3 439  
RS-B555
1989 2 20-19
0.05 56 74 B/C/H
Manual
No
Open
2 4.4 300  
RS-BR465
1990 2 30-17
0.07 56 74 B/C/H
Manual
Yes
Open
2 4.3 230 Quick auto reverse
RS-B965
1990 3 20-21
0.03 57 92 B/C/D/H
Manual
No
Closed
3 6.4 700  
RS-B765
1990 3 20-20
0.05 57 74 B/C/H
Manual
No
Open
3 5.3 439  
RS-B665
1990 2 20-18
0.05 56 74 B/C/H
Manual
No
Open
2 4.9 300  
RS-BX707
1991 3 20-20
0.05 57 74 B/C/H
Manual
No
Open
3 5.0 439  
RS-BX606
1991 3 30-19
0.05 57 74 B/C/H
Manual
No
Open
2 4.3 300  
RS-BX404
1991 2 30-17
0.07 57 74 B/C/H
Manual
No
Open
2 4.3 270  
RS-BX828
1992 3 20-20
0.03 56 74 B/C/H
Manual
No
Closed
3 5.3 439  
RS-BX727
1992 3 20-20
0.05 56 74 B/C/H
Manual
No
Open
3 5 300  
RS-BX626
1992 3 20-20
0.05 56 74 B/C/H
Manual
No
Open
2 4.3 270  
RS-BX747
1993 3 20-20
0.05 57 74 B/C/H
Manual
No
Open
3 4.6 300 Discrete 3-head
RS-BX646
1993 3 20-20
0.07 57 74 B/C/H
Auto
No
Open
3 4.6 220  
RS-BX701
1994 3 20-20
0.07 57 74 B/C/H
Auto
No
Open
2 4.6 265  
RS-BX601
1994 3 20-20
0.07 57 74 B/C/H
Auto
No
Open
2 3.8 220  
RS-BX501
1994 2 30-17
0.07 57 74 B/C/H
Auto
Yes
Open
2 3.8 200  
RS-AZ7
1996 3 20-24
0.07 62 78 B/C/H
Auto
No
Open
2 4.2 310 Magnet resistive film playback head (AmorphousZ)
RS-AZ6
1996 3 20-24
0.07 62 78 B/C/H
Auto
No
Open
2 3.9 260 Magnet resistive film playback head (AmorphousZ)