Sony TA-F333ES

Released after the TA-F555ESII and therefore being already "upgraded" in its first version - therefore not seeing a "II" version.
In some markets, the TA-F333ES was however a TA-F444ESII - Sony is Sony is Sony.

As the TA-F555ESII, and unlike the original TA-F555ES, the chassis ic copper-plated from top to bottom, select parts are used throughout and ACT (Audio Current Transfer) is still here, with added high Gm FETs and LC-OFC wiring.

Legato Linear is also used (linear gain volume control instead of voltage divider type) to minimize low-level distortion with DC-Servo eq and flat amp circuits, high-speed rectifying diodes and high-current caps.

Even if Sony's staple Spontaneous Twin Drive and Gibraltar chassis weren't there yet, the conveniences of the future were already at hand with video switching and dubbing : the chassis image shows the audio inputs (right) and a/v inputs (center, video above, audio below).
The TAC-125 wood sideburns were a Japan-only option.

The F333ES really is a less powerful TA-F555ESII as all the features, specifications and technology inside are identical : the latter is only 1,8kg heavier with 2x 120W (8 Ohm, 20Hz...20Khz) whereas the the F333ES will deafen your neighbours (and you) with only 2x 100W (8 Ohm, 20Hz...20Khz).
Both have 1.2dB of dynamic headroom, 2Hz...200Khz frequency response and 10Hz...100Khz power bandwidth.

As outlined by its very designers a few years after the fact, the looks of the TA-F333ES are a bit conservative (make that deceptive) but it does push music through even better than the original TA-F555ES.

Sony Japan advertised the TA-F333ES as the 1984 follower of the 1972 TA-1150 bestseller on 2-page ads - looking to the old to sell the new is indeed... conservative :)