{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "adafruit-audio-speakers-mics",
 "name": "Speakers, amplifiers and microphones: 3 in, 40 mm, enclosed, STEMMA speaker, MAX98357, I2S/PDM mics",
 "kind": "modern",
 "category": "Electronics",
 "group": "Indicators",
 "year": null,
 "question": "What are the dimensions of the Adafruit 3 inch speaker and 40 mm speaker?",
 "tags": [
  "speaker",
  "amplifier",
  "microphone",
  "audio",
  "adafruit"
 ],
 "aliases": [
  "3 inch speaker dimensions",
  "40mm speaker size",
  "max98357 dimensions",
  "stemma speaker",
  "i2s mic breakout size",
  "speaker grille design"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
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 "official_cad": true,
 "xem_status": "free-files",
 "les": false,
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 "sheet_txt": "https://xemstudio.com/objects/adafruit-audio-speakers-mics/sheet.txt",
 "sheet": {
  "basis": "Adafruit CAD (MIT) models; speaker frames measured from the models",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "3 in 8 Ω speaker (1313): Ø78 mm frame, 4 × Ø4 mm holes on 68 mm, 36 mm deep with the magnet. 40 mm speaker (3968): Ø40 × 5 mm. Enclosed 3 W speaker (3351): 60 × 45 × 15 mm with a JST PH plug. Mini oval (3923): 20 × 30 × 5 mm.",
   "STEMMA speaker (3885): 40 × 25 mm board with a Ø25 mm speaker. Amps: MAX98357 I2S (3006) 18 × 22 mm; PAM8302 (2130) 18 × 18 mm. I2S MEMS mic (6049) and PDM mic (4346) 15 × 18 mm with a Ø1 mm port hole.",
   "Grille: hole area at least 30% of the cone area; a 1 mm gasket ring behind the frame stops buzz."
  ],
  "table": {
   "columns": [
    "product",
    "bbox_l_mm",
    "bbox_w_mm",
    "bbox_h_mm"
   ],
   "rows": [
    [
     "1313 Speaker 3in 8Ohm 1W",
     77.8,
     77.8,
     26
    ],
    [
     "3351 Enclosed Speaker 3W 4Ohm",
     70,
     30,
     19.7
    ],
    [
     "3923 Mini Oval Speaker",
     32.5,
     19.9,
     6.5
    ],
    [
     "3968 Speaker 40mm",
     40,
     40,
     25
    ],
    [
     "3885 STEMMA Speaker",
     36.8,
     30.5,
     6.6
    ],
    [
     "3006 MAX98357",
     19.1,
     17.8,
     2.6
    ],
    [
     "2130 PAM8302",
     24.1,
     15.2,
     3.1
    ],
    [
     "6049 I2S MEMS Microphone",
     16.5,
     12.7,
     2.6
    ],
    [
     "4346 PDM Mic Breakout",
     14,
     14,
     4.5
    ],
    [
     "2133 Audio FX Soundboard with Headphone",
     49.6,
     22.9,
     6
    ],
    [
     "3436 Adafruit Music Maker Amp Feather Wing",
     51.8,
     22.9,
     12.6
    ],
    [
     "3692 TRS Jack",
     27.6,
     9.2,
     8
    ],
    [
     "5954 TRRS Trinkey",
     41.9,
     15.2,
     7.7
    ],
    [
     "987 MAX98306 Stereo Amp",
     27.9,
     24.1,
     12.1
    ],
    [
     "1752 MAX9744",
     55.3,
     43.6,
     10.6
    ],
    [
     "6513 MAX98357 Stereo Amp",
     25.4,
     19.1,
     11.9
    ],
    [
     "6421 PCM5122 I2S DAC",
     37.6,
     22.9,
     6.4
    ]
   ]
  }
 },
 "sheet_text": "Speakers, amplifiers and microphones: 3 in, 40 mm, enclosed, STEMMA speaker, MAX98357, I2S/PDM mics — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/adafruit-audio-speakers-mics/  (CC BY 4.0)\nBasis: Adafruit CAD (MIT) models; speaker frames measured from the models\nCatalog version: 2026-10-20\n\nSizes: see table below\n- 3 in 8 Ω speaker (1313): Ø78 mm frame, 4 × Ø4 mm holes on 68 mm, 36 mm deep with the magnet. 40 mm speaker (3968): Ø40 × 5 mm. Enclosed 3 W speaker (3351): 60 × 45 × 15 mm with a JST PH plug. Mini oval (3923): 20 × 30 × 5 mm.\n- STEMMA speaker (3885): 40 × 25 mm board with a Ø25 mm speaker. Amps: MAX98357 I2S (3006) 18 × 22 mm; PAM8302 (2130) 18 × 18 mm. I2S MEMS mic (6049) and PDM mic (4346) 15 × 18 mm with a Ø1 mm port hole.\n- Grille: hole area at least 30% of the cone area; a 1 mm gasket ring behind the frame stops buzz.\n\nproduct  bbox_l_mm  bbox_w_mm  bbox_h_mm\n1313 Speaker 3in 8Ohm 1W  77.8  77.8  26.0\n3351 Enclosed Speaker 3W 4Ohm  70.0  30.0  19.7\n3923 Mini Oval Speaker  32.5  19.9  6.5\n3968 Speaker 40mm  40.0  40.0  25.0\n3885 STEMMA Speaker  36.8  30.5  6.6\n3006 MAX98357  19.1  17.8  2.6\n2130 PAM8302  24.1  15.2  3.1\n6049 I2S MEMS Microphone  16.5  12.7  2.6\n4346 PDM Mic Breakout  14.0  14.0  4.5\n2133 Audio FX Soundboard with Headphone  49.6  22.9  6.0\n3436 Adafruit Music Maker Amp Feather Wing  51.8  22.9  12.6\n3692 TRS Jack  27.6  9.2  8.0\n5954 TRRS Trinkey  41.9  15.2  7.7\n987 MAX98306 Stereo Amp  27.9  24.1  12.1\n1752 MAX9744  55.3  43.6  10.6\n6513 MAX98357 Stereo Amp  25.4  19.1  11.9\n6421 PCM5122 I2S DAC  37.6  22.9  6.4\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Adafruit (official): Adafruit_CAD_Parts: STEP, Fusion 360 and STL for Adafruit products — STEP, F3D, STL — MIT — https://github.com/adafruit/Adafruit_CAD_Parts\n\nFree files (MIT License (Adafruit_CAD_Parts), Adafruit Industries; STEP + STL, 17 parts): https://xemstudio.com/files/adafruit/adafruit-audio-speakers-mics/index.json\nAPI: https://xemstudio.com/api/geometry?object=adafruit-audio-speakers-mics\n",
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 "related": [
  "buzzers-tht",
  "panel-cutouts",
  "adafruit-feather-boards",
  "raspberry-pi-5"
 ],
 "faq": [
  {
   "q": "What are the Adafruit 3 inch speaker dimensions?",
   "a": "Ø78 mm frame, mounting holes Ø4 on a 68 mm pattern, 36 mm deep including the magnet; 8 Ω 1 W."
  },
  {
   "q": "What size is the 40 mm speaker?",
   "a": "Ø40 mm, 5 mm thick, 4 Ω 3 W, bare wire leads; needs a Ø38 mm opening or grille."
  }
 ],
 "files_license": {
  "name": "MIT License (Adafruit_CAD_Parts)",
  "holder": "Adafruit Industries",
  "url": "https://github.com/adafruit/Adafruit_CAD_Parts/blob/main/LICENSE",
  "note": "Direct links to Adafruit's own CAD repository on GitHub (MIT). Xem Studio computed the bounding boxes from the STEP files and hosts nothing. Adafruit does not endorse this site."
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