Stereo #2
1978

Here is the cover of one of the myriad of audio-oriented japanese magazines published throughout high-fidelity's heyday. I have never seen issue #1 of Stereo, nor issue #3 but now own issue #2.

Stereo was much more music oriented than Stereo Sound or even Audio Accessory so most of the pages are dedicated to record reviews (jazz, classical & pop), concert reviews and interviews. The majority of the ads are in black and white while a few DIY projects are proposed along about fifty component reviews. 320 pages in toto !
The beautiful A-0012 image you can see in TVK's Pioneer section section comes from this magazine.

Well photographed here is the Yamaha PX-1, an x-rare monster of sensible electronica which was launched a few months before Stereo #2. However, this doesn't mean Stereo #2 holds a 10-page review of the PX-1 or a dedicated ad, let alone detailed "nudie" views...
Quite confusing with japanese mags: it isn't because a component is on the cover that you'll find something -anyhting- about it inside !
This is the best image of the PX-1 I have found so far as it seems Yamaha didn't care much about how it was presented in its own catalogs... The external power-supply of the PX-1 isn't shown but the record being played is "Burbank - Home of the Warner Bros. Records".