{
  "guide": {
    "slug": "teenage-engineering-ob-4-leather-bag",
    "title": "Teenage Engineering OB-4 Leather Bag Buyer Guide",
    "subtitle": "The Bill Amberg leather bag-and-strap set, its fit and materials, and the distinction from a strap-only accessory.",
    "summary": "The OB-4 leather bag is a fitted carrying accessory for an existing OB-4. Its craft and appearance justify the premium only if they matter more than inexpensive carrying options.",
    "archetype": "buyer",
    "category": {
      "slug": "hardware",
      "name": "Hardware",
      "description": "Product factsheets for computers, devices, peripherals, and buying decisions."
    },
    "tags": [
      "teenage-engineering",
      "hardware",
      "design",
      "teenage-engineering-ob-4-leather-bag"
    ],
    "version": "2026-10-18.2",
    "publishedAt": "2026-10-18",
    "updatedAt": "2026-10-18",
    "freshness": "Checked October 18, 2026. Specifications and catalog prices are manufacturer statements. This is a source-based buying reference, not an independent hands-on test or live offer feed.",
    "heroLabel": "Teenage Engineering",
    "vaultPath": "Research/Technology/Hardware/Teenage Engineering OB-4 Leather Bag Buyer Guide.md",
    "r2JsonKey": "guides/teenage-engineering-ob-4-leather-bag/2026-10-18.2.json",
    "stats": [],
    "thesisCards": [
      {
        "label": "Buying call",
        "title": "Choose it as a fitted leather accessory.",
        "body": "The Bill Amberg leather bag-and-strap set, its fit and materials, and the distinction from a strap-only accessory."
      }
    ],
    "sources": [
      {
        "id": "bag",
        "title": "OB-4 leather bag and strap",
        "url": "https://teenage.engineering/store/bill-amberg-ob4-bag",
        "publisher": "Teenage Engineering",
        "sourceType": "official",
        "role": "spec",
        "accessedAt": "2026-10-18"
      },
      {
        "id": "strap",
        "title": "Separate OB-4 leather strap",
        "url": "https://teenage.engineering/store/bill-amberg-ob4-strap",
        "publisher": "Teenage Engineering",
        "sourceType": "official",
        "role": "spec",
        "accessedAt": "2026-10-18"
      },
      {
        "id": "alternative",
        "title": "Field OB-4 shoulder bag",
        "url": "https://teenage.engineering/store/field-shoulder-bag-black",
        "publisher": "Teenage Engineering",
        "sourceType": "official",
        "role": "spec",
        "accessedAt": "2026-10-18"
      },
      {
        "id": "us-api",
        "title": "Official US product price and status feed",
        "url": "https://teenage.engineering/_api/mw2/products.json",
        "publisher": "Teenage Engineering",
        "sourceType": "official",
        "role": "price",
        "accessedAt": "2026-10-18"
      }
    ],
    "claims": [
      {
        "id": "claim-1",
        "claim": "The bag uses cowhide with aluminum hardware and includes a detachable adjustable strap.",
        "sourceId": "bag",
        "sectionId": "materials",
        "guideLocation": "materials",
        "evidenceType": "official",
        "confidence": "high",
        "caveat": "Manufacturer documentation checked October 18, 2026; no independent performance or condition verification."
      },
      {
        "id": "claim-2",
        "claim": "The bag lists 220 × 220 × 65 mm; the strap lists 33 × 1070–1170 mm.",
        "sourceId": "bag",
        "sectionId": "materials",
        "guideLocation": "materials",
        "evidenceType": "official",
        "confidence": "high",
        "caveat": "Manufacturer documentation checked October 18, 2026; no independent performance or condition verification."
      },
      {
        "id": "claim-3",
        "claim": "The catalog reference is $400 on October 18.",
        "sourceId": "us-api",
        "sectionId": "status",
        "guideLocation": "status",
        "evidenceType": "official",
        "confidence": "high",
        "caveat": "Manufacturer documentation checked October 18, 2026; no independent performance or condition verification."
      }
    ],
    "sections": [
      {
        "id": "decision",
        "eyebrow": "Decision",
        "title": "Choose it as a fitted leather accessory.",
        "body": "The Bill Amberg bag is for someone who already owns an OB-4 and wants a tailored leather carry solution. It is not another speaker, and it does not add playback features. If the goal is simply moving the radio between rooms, use its existing handle first; if you need hands-free carrying, compare the lighter-duty alternatives around the actual journey."
      },
      {
        "id": "materials",
        "eyebrow": "Materials",
        "title": "The set includes a detachable adjustable strap.",
        "body": "The official page describes a London-made, hand-stitched cowhide bag with aluminum hardware. Bag dimensions are 220 × 220 × 65 mm, and the strap is 33 mm wide with a listed 1070–1170 mm length. The bag is tailored around the OB-4 rather than specified as a rectangular universal storage volume. Do not infer that unrelated equipment fits from those numbers."
      },
      {
        "id": "fit",
        "eyebrow": "Fit",
        "title": "Check the speaker in place before relying on it outdoors.",
        "body": "Teenage Engineering calls the fit acoustically transparent. That is a manufacturer claim; this guide has no before-and-after listening or measurement test. Check access to the handle and controls, the strap attachments, and how the loaded bag rests on your body. No waterproofing or drop-protection rating was established, so leather coverage should not be treated as a sealed protective case."
      },
      {
        "id": "comparison-ladder",
        "eyebrow": "Compare",
        "title": "Do not confuse three different carrying products.",
        "table": {
          "columns": [
            "Choice",
            "What it buys",
            "Decision"
          ],
          "rows": [
            [
              "Leather bag and strap",
              "The fitted leather shell plus detachable strap",
              "Choose for the material, fit, and appearance."
            ],
            [
              "Leather strap only",
              "An adjustable strap without the bag shell",
              "Avoid paying for a bag when a strap solves the problem."
            ],
            [
              "Field OB-4 shoulder bag",
              "A nylon carry format with mesh front and storage pockets",
              "Compare pocket and access needs; it is a different accessory."
            ],
            [
              "Existing OB-4 handle",
              "No additional purchase",
              "Enough for short carries where shoulder support is unnecessary."
            ]
          ]
        }
      },
      {
        "id": "status",
        "eyebrow": "Status",
        "title": "The $400 entry is a dated catalog reference.",
        "body": "The US catalog listed the bag-and-strap set at $400 and out of stock on October 18. The separate leather strap has its own product page and must not be mistaken for the complete set. The page’s first-edition numbering language describes the original edition; inspect the actual unit and included components if buying old stock or second hand."
      },
      {
        "id": "evidence",
        "eyebrow": "Evidence",
        "title": "Materials are documented; long-term wear is not.",
        "body": "This is a source-limited accessory guide based on official specifications. Two independent long-term reviews were not established. There is no verified evidence here for seam life, finish aging, water exposure, strap comfort, or the acoustic effect of the bag. For a used purchase, request clear images of stitching, attachment points, and the speaker-facing surfaces before deciding."
      },
      {
        "id": "buy",
        "eyebrow": "Buy",
        "title": "Confirm that the offer contains both bag and strap.",
        "body": "{{commerce:target|View the official OB-4 leather bag-and-strap set}}. No exact Amazon identity was verified, and the direct link is not an affiliate link. Confirm availability, condition, edition, contents, returns, and the final price; a strap-only listing is not an equivalent offer."
      }
    ],
    "commerce": {
      "disclosure": "Official manufacturer link; no affiliate commission from this link.",
      "primaryLinkId": "target",
      "priceApi": {
        "provider": "merchant-observed",
        "status": "not_configured",
        "note": "No live offer feed. Confirm exact product, price, availability, seller, and returns."
      },
      "links": [
        {
          "id": "target",
          "merchant": "Teenage Engineering",
          "title": "Teenage Engineering OB-4 Leather Bag",
          "label": "Teenage Engineering OB-4 Leather Bag",
          "description": "Exact model reference; confirm offer terms before ordering.",
          "url": "https://teenage.engineering/store/bill-amberg-ob4-bag",
          "relationship": "direct",
          "role": "target",
          "factCard": {
            "summary": "The OB-4 leather bag is a fitted carrying accessory for an existing OB-4. Its craft and appearance justify the premium only if they matter more than inexpensive carrying options.",
            "caveat": "Identity is established; current offer, condition, delivery, and return terms require seller verification."
          }
        }
      ]
    }
  },
  "publicUrl": "https://fieldguides.co/g/teenage-engineering-ob-4-leather-bag"
}