Kenwood L-07C

1 9 7 7 1977
1 9 7 8

TRIO in Japan, Kenwood elsewhere - the discrete big little audiophile preamp.

As in Sony's earlier (and twice pricier) TA-E88B, the keyword is : no ICs !
Therefore terribly reliable and planned to still be repairable in 2156. There is only one circuit board, separated by a long bus bar for the left and right channels : input stages to the left, output stages to the right, power-supply in a sub enclosure to the far left.

Input capacitor-less, low-impedance circuit, low residual noise (0,1mV), ±0,3dB volume gang error plus a 20dB variable gain stage to balance input/output levels and gain some more in s/n ratios. Also resistor-switching tone controls.

Connected to the L-07M monoblock bestseller, the circuit guaranteed high-bandwidth and low loss in cabling thanks to the 10 Ohm output impedance - Sigma Drive and 600Khz bandwidth were however for later years.

Kenwood sold thousands and thousands of L-07C worldwide but these sell for very cheap nowadays... unlike the TA-E88. The matte brown-ish finish sadly didn't age well and gives most L-07Cs a "vintage" look even if the unit has been only sparingly used, too.

Updated in 1978/79 as L-07CII, with a very welcome visual lifting, volume pot and componentry upgrades but selling much less than its original.
Finally completely replaced by the futuristic-looking L-08C in 1980/1981 which sold... very little.

Kenwood L-07C, image 1 Kenwood L-07C, image 2 Kenwood L-07C, image 3
Kenwood L-07C specifications
Title Value
Inputs : 1x phono MM (2mV / 50kOhm)
1x phono MC (0,2mV / 600 Ohm)
1x tuner (140mV / 50kOhm)
1x aux (140mV / 50kOhm)
1x tape (140mV / 50kOhm)
Record output : 140mV / 100 Ohm
Preamp output : 1V/ 10 Ohm
Max phono input : 350mV (1Khz, MM)
35mV (1Khz, MC)
Frequency response : 20Hz...50Khz (lines, +0 / -1dB)
10Hz...200Khz (lines, +0 / -0,5dB)
3Hz...500Khz (lines, -2dB)
20Hz...20Khz (phono 1, ± 0,2dB, RIAA)
50Hz...20Khz (phono 2, ± 0,2dB, RIAA)
THD : 0,003% (lines (20Hz...20Khz, for 1V output)
0,005% (lines (20Hz...20Khz, for 7V output)
0,01% (lines (20Hz...20Khz, for 10V output)
0,003% (phono 1, 20Hz...20Khz, VR -20dB / Gain -10dB)
0,009% (phono 2, 20Hz...20Khz, VR -20dB / Gain -10dB)
S/N ratio : 83dB (MM)
65dB (MC)
110dB (lines)
Channel separation : 100db
Bass control : ± 7,5dB / 100Hz
Treble control : ± 7,5dB / 10Khz
Subsonic filter : 12dB/octave below 18Hz
PC : ??W
Dimensions : 48 x 10 x 33,2cm
Weight : 7kg.
List price : 100,000¥ (1977)
Kenwood L-07C : 0 topic
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page online since : december 2008
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page type : LGT / KNB
page weight : 188.96 Kb / 0 b

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