Congratulations! :thmbsp: That's a beautiful table, and not a very easy one to find. I think it is the third-best TT that Kenwood ever made; the only better ones are at least as rare as it is, too.
The following information comes from a post by "vantagaudio" on AG, back in 2005, It's the most information I've seen about this TT, in one place:
The KD-750 cabinet is a mixture of outer laminated particle board (Kingrose veneer with piano gloss) over an ARCB base.
The motor is a DC servo motor (torque of 1.5 kg.cm), quartz locked with electric brake, unit has 2 speeds (33 and 45), die-cast alloy platter (5.7lbs), W&F less than 0.022% wrms. Rumble figure of -74dB (weighted DIN) and -55dB (unweighted DIN).
Standard tonearm fitted was an S-type, effective length 245 mm with 15 mm o/h, VTF range 0 to 3 grams, cartridge weight range 4 to 14 grams, adjustable collet chuck on arm base.
Unit power consumption 35 watts, weight 38.6lbs (cabinet weight was 16.5lbs of which the ARCB element was 7.7lbs.
That ARCB stuff he refers to is a concrete-like mixture (I think it is cement/glass/stone/resin mix of some kind, not unlike the "faux marble" stuff used in the KD-500/550/600/650 series; it looks more cement-like, though).