Speakers, amplifiers and microphones: 3 in, 40 mm, enclosed, STEMMA speaker, MAX98357, I2S/PDM mics — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/adafruit-audio-speakers-mics/ (CC BY 4.0) Basis: Adafruit CAD (MIT) models; speaker frames measured from the models Catalog version: 2026-10-20 Sizes: see table below - 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. product bbox_l_mm bbox_w_mm bbox_h_mm 1313 Speaker 3in 8Ohm 1W 77.8 77.8 26.0 3351 Enclosed Speaker 3W 4Ohm 70.0 30.0 19.7 3923 Mini Oval Speaker 32.5 19.9 6.5 3968 Speaker 40mm 40.0 40.0 25.0 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 14.0 14.0 4.5 2133 Audio FX Soundboard with Headphone 49.6 22.9 6.0 3436 Adafruit Music Maker Amp Feather Wing 51.8 22.9 12.6 3692 TRS Jack 27.6 9.2 8.0 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 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Adafruit (official): Adafruit_CAD_Parts: STEP, Fusion 360 and STL for Adafruit products — STEP, F3D, STL — MIT — https://github.com/adafruit/Adafruit_CAD_Parts Free files (MIT License (Adafruit_CAD_Parts), Adafruit Industries; STEP + STL, 17 parts): https://xemstudio.com/files/adafruit/adafruit-audio-speakers-mics/index.json API: https://xemstudio.com/api/geometry?object=adafruit-audio-speakers-mics