Onkyo DX-G10

Rare 27 kilo monster CD player where everything is... light.

More precisely : optical.
1988 marks the beginning of Toshiba's TOS technology, transforming electrical current into light to avoid any electrical interference from the circuits ruining the signal's coherence and integrity.

So the DX-G10 (C-2001 in Japan, Integra DX-6990 in Europe) transfers the digital signal from the digital board to the analogue board by way of five opto-couplers. Before that final stage, light is used to power the two Opto-Drive converters, so as to eliminate possible electromagnetic leaks into the signal itself.

The two Acculinear converters are 18bit ; two 8fs oversampling digital filters help out and perfect the fully-balanced d/a scheme.

Not much so far to make 27 kilos, so the DX-G10 rests on a graphite-reinforced steel base of the the same kind as that of the A-G10 amplifier (Integra A-2001 in Japan) - now we're closer to 20 kilos.
The remaining seven comprise the power transfomer, the GIC analogue LPF filters before the analogue output, the aluminium shielding of the various blocks, the thick aluminium top and front, the real wood sideburns with black piano finish, and the linear motor CD drive.

Said drive was of course built by somebody else - Sanyo.
An excellent drive which has one of the best RF patterns coming out of the laser and otherwise very solidly built, and seemingly still serviceable today !
(UPDATE : seems like it may be the Sony BU-1E ?)

Supplementary audiophile touches lies in the absolute phase reversal switch and the dimming of the FL display.
Non-audiophile touches lie in the variable output level which flashes with ten tiny little LEDs, just below the shuttle search.

As for the Integra P-308 and M-508, the export version has a badge that says Grand Integra while the original japanese version only says Integra.