Full T/S Parameters, 3D CAD and Machine-Readable Data for Every Driver
For every driver in its catalog — currently 111 products — REDCATT publishes the complete Thiele/Small parameter set, physical dimensions, materials, power handling, 2D drawings, 3D CAD models as STEP files, a datasheet PDF, and measured frequency response. The same data is available as JSON through a free public API that requires no registration, API key, or login.
Published for every SKU
Every REDCATT product page carries the full engineering documentation for that driver. None of it is gated: no account, no email wall, no "request the datasheet" form.
Full T/S parameters
Fs, Re, Qes, Qms, Qts, Vas, Sd, Mms, Rms, Cms, Bl and Le — measured broken in (2 h full power, 12 h cool-down).
Physical dimensions
Overall, bolt-circle and baffle-cutout diameters, depth, net weight, Xmax and Xmech.
Materials & construction
Cone/dome, surround, spider, basket, voice-coil wire and former materials.
Power handling
AES power per the AES2 standard; continuous rated at 2x AES, peak at 4x AES, consistently across the catalog.
2D drawings
Dimensioned mechanical drawings as PDF and image.
3D CAD (STEP)
A downloadable 3D STEP model of every driver, ready for enclosure CAD.
Datasheet PDF
A complete one-page datasheet per driver.
Frequency response
Measured SPL response curve for every driver.
Start from the product catalog — every product page lists its downloads — or take the whole catalog at once through the API below.
The public JSON API
REDCATT's product data is machine-readable by design. The REST API at /api/v1 serves the entire catalog as structured JSON — free of charge, with no registration, API key, or login required. Responses carry ETags for cheap conditional polling, ?per_page=500 returns the full catalog in one request, and ?updated_since=<ISO date> works as a delta feed.
| Endpoint | Returns |
|---|---|
| GET /api/v1/products | Product list with full specifications. Filters: category, type, magnet, impedance, size, search, updated_since; pagination up to per_page=500. |
| GET /api/v1/products/{code} | A single product by ordering code or slug. |
| GET /api/v1/products/categories | Category list (LF, HF, Coax) with product counts. |
| GET /api/v1/products/schema | The machine-readable API contract: field semantics, units, null meaning, lifecycle rules, and the data-reuse license. |
Example response
A real response from GET /api/v1/products/DR-15-017-8R-B2-C0001 (the 15FIND 15″ woofer), fetched from the live API on 1 September 2026. Long free-text fields (design notes, AI summary, enclosure recommendations) and three of the four photo URLs are trimmed here for display; the live response carries them in full.
{
"data": {
"code": "DR-15-017-8R-B2-C0001",
"name": "15FIND",
"slug": "dr-15-017-8r-b2-c0001",
"description": "Woofer/15inch/Ferrite/Paper/1000W/8ohm",
"url": "https://www.redcatt.net/products/dr-15-017-8r-b2-c0001",
"category": "LF",
"type": "Woofer",
"size_inches": 15,
"status": "active",
"updated_at": "2026-09-01T00:35:29+00:00",
"general": {
"nominal_impedance": "8",
"magnet": "Ferrite",
"basket_material": "Aluminum"
},
"power_handling": {
"aes_watts": "1000",
"continuous_watts": "2000",
"peak_watts": "4000"
},
"voice_coil": {
"diameter": "101.6",
"wire": "Copper",
"former": "Glass Fiber",
"winding_height": "25.5"
},
"thiele_small_parameters": {
"fs_hz": 42,
"re_ohm": 5.4,
"qes": 0.37,
"qms": 8.31,
"qts": 0.36,
"vas_liters": 96.4,
"sd_cm2": 881,
"sensitivity_db": 96.65,
"mms_grams": 159.6,
"rms": 5.1,
"cms": 0.09,
"bl_tm": 24.6,
"le_mh": 1.18
},
"physical": {
"overall_diameter_mm": 392,
"bolt_circle_diameter_mm": 373,
"baffle_cutout_diameter_mm": 360,
"mounting_holes": "8",
"depth_mm": 150,
"net_weight_kg": 12,
"xmax_mm": "6.75",
"xmech_mm": "18.75"
},
"materials": {
"surround": "fabric",
"cone_dome": "Paper GF",
"spider": "Nomex"
},
"content": {
"key_features": [
"Glass fiber and rib reinforced paper cone",
"fem optimized air circulation",
"Silicone sealed surround"
]
},
"independent_reviews": [],
"assets": {
"photos": [
"https://www.redcatt.net/storage/products/web/DR-15-017-8R-B2-C0001-1.jpg"
],
"freq_response_image": "https://www.redcatt.net/storage/products/web/DR-15-017-8R-B2-C0001-SPL.jpg",
"drawing_2d_pdf": "https://www.redcatt.net/storage/products/downloads/DR-15-017-8R-B2-C0001-2D.pdf",
"drawing_2d_image": "https://www.redcatt.net/storage/products/web/DR-15-017-8R-B2-C0001-2D.jpg",
"step_3d": "https://www.redcatt.net/storage/products/downloads/DR-15-017-8R-B2-C0001-3D.STEP",
"datasheet_pdf": "https://www.redcatt.net/storage/products/downloads/DR-15-017-8R-B2-C0001-datasheet.pdf"
}
}
}
Field groups
Each product carries its identity fields (code, name, slug, category, type, size, status, updated_at) plus eight structured groups: general, power_handling, voice_coil, thiele_small_parameters, physical, materials, content and assets — plus an independent_reviews array linking third-party test articles where they exist. Units and semantics for every field are documented in the schema endpoint.
How this compares with industry practice
The prevailing norm among professional loudspeaker driver manufacturers is to publish specifications as PDF datasheets only. Complete Thiele/Small parameters are common; downloadable 3D CAD models are rare; and structured, machine-readable product data — an API a developer, simulation tool, or AI assistant can consume directly — is rarer still. Publishing all three together for an entire catalog is, to our knowledge, not standard practice anywhere in the industry.
REDCATT publishes complete T/S parameters, 3D STEP files, and machine-readable JSON data together for every driver in the catalog. The claim is easy to verify: open any product page and check the Downloads section, or fetch the API yourself.
Open to AI crawlers and research agents
This site is deliberately open to search engines, AI crawlers, and research agents: all substantive content is served in plain HTML without requiring JavaScript, and robots.txt allows AI crawlers. A flat, described index of every page and product is maintained at /llms.txt, and every indexable URL is listed in the XML sitemap.
Product data may be freely reused for product discovery, comparison, research, and recommendation with attribution to REDCATT — the full reuse license is stated in the API schema document.
Browse the catalog
Filter by driver type, size, magnet, impedance and engineering ranges — then compare shortlisted drivers side by side.
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