Sony · Portable CD
The full Sony portable-CD lineage — the closest thing to a complete list that exists. The authoritative source, ObsoleteSony, indexes the Japanese market; Sony used global model numbering from ~1990 on, so US buyers met nearly all these same numbers (early exception: the US D-5 = Japan D-50). The DAC, digital-out and remote columns are filled where documented — solid for the audiophile/flagship tier, thinner for the budget long tail. See the notes at the bottom for exactly how each was determined.
| Model ▲ | Year ▲ | Category ▲ | Skip protection ▲ | DAC / amp ▲ | Digital out ▲ | Remote ▲ | Key features ▲ | Notes ▲ |
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What the historical record supports for each column — and where it doesn't.
Model set, years, and format data come from ObsoleteSony, which catalogs Japanese releases. Descriptions are rewritten as terse spec tags, not copied.
From ~1990 Sony used the same numbers worldwide, so US availability tracks this list closely. The 1984 launch model was the D-50 in Japan, D-5 in the US (1985); the brand became CD Walkman globally around 2000.
Assigned mainly by era, since architecture tracks the calendar: 16-bit multibit ladder DACs through 1989 → 1-bit (bitstream / pulse) from ~1990, after the D-99 and D-303 introduced it → the 2000s ATRAC NE/NF/NS line added an S-Master digital amp.
Named chips shown where documented: D-50/D-5 16-bit linear; D-50 MkII Burr-Brown PCM55; D-Z555/D-555 dual Burr-Brown PCM66P with 8× oversampling. The 1989→1990 boundary was the transition, flagships first, so a couple of 1990–91 budget units may still be multibit.
Optical out was a premium-only feature. Full-size TOSLINK on the late-80s flagships (D-Z555/D-555, D-303, jack on the back). From the D-465 (1996) onward, higher-end models used a 3.5 mm combined optical/analog line-out — a red LED glows in the jack — tied to Sony's MiniDisc-recording push (labeled "MD Link" on some).
Marked Optical only where confirmed by manuals, spec sheets, or collector inventories. A blank means not confirmed, which for budget/mid models usually means analog line-out or headphone-only — but absence here isn't proof.
You asked for three states. Two are populated: No remote (pre-1989 players and desktop units) and LCD remote (opt.) — an inline wired remote with its own LCD, standard/optional across the line from ~1992 (a few early units used a plain wired remote; the D-535G a wireless card remote).
The third — display/controls only on the remote — I could not confirm for any Sony CD model. Sony consistently kept an LCD and basic transport on the body (e.g. the D-NE920 lists both a 5-line body LCD and a backlit LCD remote), so nothing is flagged into that state. Name a model you suspect and I'll check it.
By era, with documented generations flagged in-cell: None 1984–91 (mechanical damping from the D-150, no buffer) → ESP ~1992–97 (~10 s; D-465 hit 20 s) → ESP2 ~1998 (~40 s) → G-Protection 1999 on (a smarter recovery scheme, not just a bigger buffer).
Beyond audio players: Car Discman (K/CK), My First Sony kids' units, Video CD players, CD-ROM drives, and the Data Discman e-book line — filter by category to isolate pure audio.
For internals and per-model detail: ObsoleteSony, Walkman Central, Hi-Fi Wiki, and the Head-Fi / Tapeheads forums.
Images load from an images/ folder beside this file, named {model}_thumb.jpg — e.g. D-50_thumb.jpg. Models with a space use an underscore (D-EJ775 M7 → D-EJ775_M7_thumb.jpg). Drop a JPG in and it appears; add them whenever you like.
Where none exists yet, a generic line drawing stands in. One Creative Commons photo is wired in to start — the D-50, by Binarysequence, CC BY-SA 4.0 via Wikimedia Commons. To add more, extend the CC_IMAGES map near the top of the script.
Compiled Aug 2026 · data © ObsoleteSony (Japan-market) · spec tags & classification rewritten for this reference · DAC/out/remote filled where documented — verify before purchase