Kenwood KA-1000

1 9 8 0 november 1980
1 9 8 2 1982

No need to present this well remembered piece of sci-fi-esque design.

Powerful, very powerful, tight, very tight with Sigma Drive and a very long Heat-Pipe to keep everything cool.
Heat-Pipes became en vogue around 1979 and almost everybody, from Sony to Sansui used them (Sony first in 1978 : in the Precise P7 TA-P7F).

After 1982, the system started to vanish rapidly : probably because the Freon gas held inside was deemed dangerous by some administration or another...
However, Luxman kept Heat-Pipes in high-end amplifiers like the L-550 series, the L-570 and L-540 1989 bestsellers which remained available until the mid 1990s. Or maybe it simply cost too much, too.

The non-magnetic chassis always is a suprise to discover "in the flesh"... it is made of plastic ! This explains the somewhat sloping parts and top covers one can see in the catalogs - plastic doesn't like heat nor does it age well.
The front windows of the KA-1000 are however made of real glass, not easy-to-scratch acryl or perspex.

But the KA-1000 was a fine example of high-end Hi-Fi navigating between the 1970s robustness and 1980s trendy trends in technology as well as design.
Despite the plastic thing, I want one.

Kenwood KA-1000, image 1 Kenwood KA-1000, image 2 Kenwood KA-1000, image 3
Kenwood KA-1000 specifications
Title Value
Power (IEC) : 2x 110W (4 Ohm, 63Hz...12,5Khz, 0,7% THD)
2x 100W (8 Ohm, 20Hz...20Khz, 0,7% THD)
Power (FTC) : 320W (4 Ohm)
200W (8 Ohm)
THD : < 0,005% (rated output)
IMD : < 0,005%
Frequency response : DC...400Khz (-3dB)
Damping factor : 600 at the end of the Sigma Drive cable (100Hz, 8 Ohm)
Rise time : 0,9µSec.
Slew Rate : ± 120V/µSec.
Inputs : 2,5mV / 33/47/100kOhm (Phono MM)
0,2mV / 100Ohm (Phono MC)
150mV / 47kOhm (tuner, tape, aux)
S/N ratio : 87dB (phono MM ; 93dB/5mV)
67dB (phono MC, 0,2mV)
105dB (high level sources)
Bass control : ± 10dB (at 50Hz, 200Hz turnover)
± 10dB (at 100Hz, 400Hz turnover)
Treble control : ± 10dB (at 10Khz, 3Khz turnover)
± 10dB (at 20Khz, 6Khz turnover)
Loudness : +10dB @ 100Hz (-30dB volume)
Subsonic filter : 18Hz, 6dB/octave
PC : 5,7A
Dimensions : 44 x 12,3 x 37,5cm (KA-1000)
Weight : 14,4kg.
Sigma Drive output
Heat-Pipe cooling system
"touch-sensitive" volume control
preset level slider
separate power-supply
non-magnetic chassis
real glass front flap
Kenwood KA-1000 : 0 topic
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page online since : march 2007
page updated : march 2010
page type : LGT / KNB
page weight : 169.97 Kb / 0 b

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