Back in the time audio was really beginning to be more popular and mainstream and Stereo Review, High Fidelity and Audio were the leading magazines in the U.S., there was a revolution occurring in the industry. In the 50's and 60's was the progression from predominantly monaural to stereo in both source and reproduction, the introduction and widespread adoption of acoustic suspension speakers and the move from tubes to solid state gear. All of these factors played off each other - acoustic suspension speakers were power hungry, stereo required twice as many channels - contributing to the popularity of solid state amplification. In partial defense of the reviewers of the time, such as Julian Hirsch, most transistor amps also featured much lower distortion figures than tube amps and that is reflected in the evaluations. In terms of subjective evaluations, in many of the reviews of electronics in Stereo Review early on there wasn't one. The entire review was measurements, performed by Hirsch-Houck Laboratories. Speaker reviews were an exception, but as Stereo Review's Technical Editor Larry Klein wrote in the August, 1969 issue, the subjective evaluations of speakers were an amalgam of the opinions of him, Julian Hirsch and Gladden Houck.
I absolutely devoured every issue of Stereo Review, High Fidelity and Audio back then (as well as any other audio magazine I could find). Both for the equipment reviews and the music reviews. Of the three, I Iiked Audio the best because they always had a subjective section along with the measurements. But a huge advantage for us audiophiles (we weren't called that then) at that time was that there were a lot of audio stores around, so we could rely much more on our own ears and much less on reviews. I worked part-time at a Lafayette Radio and Electronics but, when I wasn't there or at school, I spent more time hanging out in stereo stores or with other audio friends than doing anything else.
So I don't really feel that Julian Hirsch really did a disservice. His and other reviewers really have to be viewed in the context of the times and context and intent of the publication.