Toshiba also had two other sets available: the "12" and the "10". The 12 has the same amp / preamp / structure but no dedicated tuner ; the 10 works with an integrated amp and tuner. Dedicated cassette decks were at hand for both systems, alongwith two racks: AR-15HU (small) and AR-15VH (big).

The units were:
SC-M12 / SC-M12B
SY-C12 / SY-C12B
PC-D12 / PC-D12B
SA-A10 / SA-A10B
ST-F10 / ST-F10B
PC-D10 / PC-D10B

All available in clear champagne and (supposedly) in B for black, the latter, however are more than exceedingly rare - if eever really produced. Design-wise not as interesting, the 12 and 10 combos, however, are far prettier than most plasticky dinkys produced ever since.
I'll post the 12 and 10 systems on TVK at a later date.

Toshiba SC-M15
Toshiba SY-C15
Toshiba ST-F15
(1978 - 1981)

Without a doubt, Toshiba's System 15 is the best "micro-system" produced during the last remaining moments of high-fidelity's best years. It also is the prettiest and most coherent design of all mid-size components. Although the amplifier and preamplifier did deserve just as much, only the black version of the ST-F15 (ST-F15K) was to win a 1978 japanese Good Design Award.

I believe the accompanying PC-D15 recorder and AD-15 dynamics processor to not have been actually produced beyond a few pre-production samples.

Besides excellency in design, there is full hi-fi inside these components: all-DC, toroidal transformers, 1-piece diecast aluminium chassis for the power amplifier (!), 3-piece extruded aluminium for the others, dual-FETs and more - click the buttons below for the respective details, specs and block-diagrams.

Unlike Aiwa's slightly later "22 Series" which was sold under many different brand names, Toshiba's System 15 never saw any OEM version - by 1979, this probably was already too expensive to build. The Technics C-01 must've suffered the same fate.

The future was to Sony's FH-7 quality system, and then to... less quality.