Kyocera A-710

1 9 8 5 july 1985
1 9 8 8 1988

The smaller one - integrated amp.

As for the B-910, the A-710 saw two versions : original and export, the latter differing even more than the original B-910 from its export version - again, very Luxman-like.
Some of the two-market mods were carried into the two versions of the bigger A-910 (too Luxman not to be true :) and both export versions are in fact "supercharged".

The export A-710 sports a supplementary 10kg - and that's not from drinking beer.

Center of the A-710 is the DIOS layout to do away with the flat amp and connect directly input and output, the tone controls falling between the two within an NFB loop.

DIOS is what the earlier Single-Stage Push-Pull (SSP) did for the C-910 and B-910 but allowing to design the input layout accordingly.
This however was carried out very differently between the original and export versions, just as internal layout, componentry and front functions : they are in fact completely different amps :

> One set of inputs, labeled "direct" are hooked directly to the volume attenuator and subsequent final stage's "direct out" speaker terminals ; this is a supplementary input with a dedicated front switch.

> Inside is a bigga toroidal trafo with two 22,000µF main caps while the front sees the following switches :
normal speakers, bass/treble turnovers, tone on (with led), tape monitor (with led), monitor 1/2, muting, direct in (with led).

> Inputs see an MC high / MC low / MM secondary knob.

> No dedicated direct input but a supplementary set of speaker outputs (binding and banana terminals !) allow to route any input directly as described above.

> Being "supercharged", the export version also has a pre out / main in loop and a phono 1 high/low input impedance switch (both placed where the direct in of the JP original is).

> Inside is an eeenormous EI trafo and, of course a different ps board and different boards allover. Front switches are far more numerous and... different :
speakers A, speakers B, bass turnover, treble turnover, tone defeat, line direct, tape monitor, monitor 1/2, mono, subsonic, loudness and muting (with led).

> Added after all of these is a tiny balance pot and the two original LEDs were moved further left on the front and show L and R peak levels.

> If the tape copy secondary knob was kept identical, the phono-related one sees more options : 10 / 40 / 100 Ohm (MC side) and 50k / 100kOhm (MM side).

... you guessed it, the export A-710 is a less powerful A-910 and not the export equivalent of the japanese A-710 !
The more I know about Kyocera, the more it reminds me of constantly bordelic Luxman production madness (see here).

If the original 710 was awarded a Stereo Sound "Best Product" page, the export version would certainly have received a "Component of the Year" prize !
Kyocera didn't sell many outside Japan but sold plenty in its homeland.

Shown here are images of the japanese version only - I still haven't got the related catalog for the export version.

Kyocera A-710, image 1 Kyocera A-710, image 2 Kyocera A-710, image 3 Kyocera A-710, image 4
Kyocera A-710 specifications
Title Value
JP version JP version
Power output : 2x 100W (8 Ohm, 20Hz...20Khz)
2x 120W (6 Ohm, 20Hz...20Khz)
2x 140W (4 Ohm, 20Hz...20Khz)
2x 160W (4 Ohm, 1Khz)
THD : 0,005% (1Khz, 8 Ohm)
IMD : 0,03% (8 Ohm)
Frequency response : 10Hz...100Khz (+0 / -1dB)
Damping factor : 180 (8 Ohm, 50Hz)
Inputs : 200mV / 24kOhm (direct in)
2,5mV / 47kOhm (phono MM)
0,22mV / 40 Ohm (phono MC high)
0,15mV / 10 Ohm (phono MC low)
200mV / 24kOhm (lines)
RIAA accuracy : ± 0,25dB (20Hz...20Khz)
Maximum phono input : 150mV (MM)
13mV (MC high)
11mV (MC low)
S/N ratio : 74dB (MC high)
74dB (MC low)
105dB (lines)
Bass control : ± 10dB @ 100Hz (600Hz turnover)
± 10dB @ 20Hz (150Hz turnover)
Treble control : ± 10dB @ 10Khz (1,5Khz turnover)
± 10dB @ 20Khz (6Khz turnover)
Subsonic filter : 6dB / octave below 15Hz
PC : 270W
Dimensions : 43 x 15,5 x 42,3cm
Weight : 18,5kg.
List price : 189,000¥ (1985)
Kyocera A-710 : 0 topic
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page online since : 2008
page updated : november 2011
page type : LGT / KNB
page weight : 912 Kb / 608.34 Kb

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