The SH-8065 offers the usual ±12 dB adjustments, and offers a selectable ±3 dB range for precision equalization. In other words, pressing the ±3 dB switch makes the full range of the sliders only ±3 dB, which is ideal for making only the most precise and delicate adjustments to otherwise perfect audio systems.

A foolish feature is a switch to reverse the effects of equalization, in other words, it turns the boosts to cuts and vice versa.

The SH-8065 is the world's first 33-band EQ; previous equalizers stopped at 31 bands, while this Technics SH-8065 adds two more third-octave sliders, one at 16 Hz and one at 25 kHz, to allow precision equalization to just beyond the ends of the audio band.

Compared to ordinary 31-band equalizers, the SH-8065 is particularly useful for the precision equalization of extreme full-range systems, especially where subwoofer performance to 16 Hz and below is important.

Personally, I used to run a pair of 18" JBL 2245H subwoofers in 8 cubic-foot enclosures with an eighth-order dedicated time, phase and frequency equalizer that made them flat to ±2 dB at 10 Hz, so I could have used one of these to optimize them to my listening room.

The Technics SH-8075 (not shown) was the same thing, but added one extra 20-200 Hz variable parametric section where the SH-8065's silly range displays were. The SH-8075 replaced the ±3 dB precision equalization option and the foolish ability to reverse the EQ curve with a second tape monitor loop.