Sony WM-DD9
E215022
The Sony WM-DD9 is a high-end, audiophile-grade portable cassette player from Sony’s Walkman line, renowned for its precision engineering, dual-capstan transport, and exceptional sound quality.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Sony WM-DD9 canonical | 1 |
| Sony Walkman WM-DD | 1 |
| Sony Walkman WM-DD9 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1934307 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Sony WM-DD9 Context triple: [Walkman, notableModel, Sony WM-DD9]
-
A.
Denon Wing
Denon Wing is one of the main wings of the Louvre Museum in Paris, housing many of its most famous artworks, including Leonardo da Vinci’s Mona Lisa.
-
B.
WM-21 Sólyom
The WM-21 Sólyom was a Hungarian reconnaissance and light bomber aircraft developed in the late 1930s and operated by Hungary during World War II.
-
C.
Ovi
Ovi is the widely recognized nickname of Alex Ovechkin, the prolific Russian goal-scorer and NHL superstar.
-
D.
B&O Warehouse
B&O Warehouse is a historic former railroad warehouse in Baltimore that forms the iconic brick backdrop beyond the right-field wall at Oriole Park at Camden Yards.
-
E.
Bose
Bose is a common Indian surname most prominently associated with physicist Satyendra Nath Bose, whose work led to the concept of bosons and Bose–Einstein statistics.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Sony WM-DD9 Target entity description: The Sony WM-DD9 is a high-end, audiophile-grade portable cassette player from Sony’s Walkman line, renowned for its precision engineering, dual-capstan transport, and exceptional sound quality.
-
A.
Denon Wing
Denon Wing is one of the main wings of the Louvre Museum in Paris, housing many of its most famous artworks, including Leonardo da Vinci’s Mona Lisa.
-
B.
WM-21 Sólyom
The WM-21 Sólyom was a Hungarian reconnaissance and light bomber aircraft developed in the late 1930s and operated by Hungary during World War II.
-
C.
Ovi
Ovi is the widely recognized nickname of Alex Ovechkin, the prolific Russian goal-scorer and NHL superstar.
-
D.
B&O Warehouse
B&O Warehouse is a historic former railroad warehouse in Baltimore that forms the iconic brick backdrop beyond the right-field wall at Oriole Park at Camden Yards.
-
E.
Bose
Bose is a common Indian surname most prominently associated with physicist Satyendra Nath Bose, whose work led to the concept of bosons and Bose–Einstein statistics.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Sony Walkman
ⓘ
portable cassette player ⓘ |
| audioFormat | compact cassette ⓘ |
| audioOutput | stereo ⓘ |
| brand | Sony ⓘ |
| buildQuality | high ⓘ |
| cassetteTypeSupported |
Type I
ⓘ
Type II ⓘ Type IV ⓘ |
| collectibleStatus | highly sought after ⓘ |
| controlType | mechanical buttons ⓘ |
| countryOfOrigin | Japan ⓘ |
| designGoal | high-fidelity portable audio ⓘ |
| driveMechanism | direct drive ⓘ |
| era | late 1980s ⓘ |
| hasFeature |
Dolby B noise reduction
ⓘ
Dolby C noise reduction ⓘ auto-reverse ⓘ headphone output ⓘ line out ⓘ metal tape compatibility ⓘ |
| intendedMarket | audiophile ⓘ |
| manufacturer | Sony ⓘ |
| marketPosition | flagship Walkman model ⓘ |
| mechanicalTransport | dual-capstan closed-loop ⓘ |
| mechanismQuality | precision engineered ⓘ |
| noiseReductionSystem |
Dolby B
ⓘ
Dolby C ⓘ
linked to:
Dolby B
|
| notableFor |
audiophile reputation
ⓘ
exceptional sound quality ⓘ high build quality ⓘ low wow and flutter ⓘ |
| portability | pocket-sized ⓘ |
| powerSource |
AA batteries
ⓘ
external DC adapter ⓘ |
| primaryUse | music playback ⓘ |
| productCategory | consumer electronics ⓘ |
| productLine |
Sony Walkman
ⓘ
linked to:
Walkman
|
| series | DD series ⓘ |
| soundQuality | high ⓘ |
| status | discontinued ⓘ |
| tapeSpeed | 4.76 cm/s ⓘ |
| targetUsers |
collectors
ⓘ
portable audio enthusiasts ⓘ |
| transportType | dual-capstan ⓘ |
| wowAndFlutter | very low ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Sony WM-DD9 Description of subject: The Sony WM-DD9 is a high-end, audiophile-grade portable cassette player from Sony’s Walkman line, renowned for its precision engineering, dual-capstan transport, and exceptional sound quality.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.