~/workshop $ cat ./inventory/dweii-4ohm-mini-speaker/README.md

DWEII 4Ω 3W Mini Speaker (10pcs)

category: Bench stock
qty: 10
status: owned / untested
maker: DWEII (reseller/private-label; no separate chip/component manufacturer — this is a passive speaker)

Overview

A small full-range passive speaker with a JST 1.25mm 2-pin wired connector, intended for small electronics/DIY audio projects. Pairs naturally with an I2S amp breakout like [[max98357a-i2s-amp-breakout]] — the amp drives it directly, no additional circuitry needed.

Key specs

Impedance: 4Ω
Power: 3W rated (listing describes it as “3W Full Range”)
Connector: JST 1.25mm 2-pin, pre-wired
Form factor: ultra-thin cavity-style speaker (exact dimensions not confirmed — listing doesn’t give a measured size for this specific 4Ω/3W/10-pack variant)

Pinout

Not applicable — 2-wire passive speaker (JST 1.25mm 2-pin connector, no polarity requirement for basic use, though consistent +/- wiring matters if driving multiple speakers in phase).

Wiring / typical usage

Connect the two speaker leads directly across an amplifier’s output (e.g. the bridge-tied output of a MAX98357A breakout). No external components required — it’s a passive transducer. If the JST connector doesn’t match the amp board’s terminal style, the leads can be cut/re-terminated or wired directly to screw terminals/solder pads.

Code / libraries

N/A — passive speaker, driven entirely by whatever amplifier feeds it.

Source material

Purchase link: Amazon, “DWEII 10PCS Speaker 4 Ohm 3W Full Range Cavity Sound HiFi Speaker Accessories Ultra-Thin with JST1.25 mm 2-Pin Interface Wire” (ASIN B0F3DBRXS5)
Product photo: /inventory/dweii-4ohm-mini-speaker/product-photo.jpg — cropped directly from Alex’s own Amazon order-history thumbnail for this exact purchase (the listing’s own product image, not a stand-in). Low resolution (thumbnail-sized) since it’s a cropped order-history screenshot rather than a full-size product photo — fine for dashboard identification, worth replacing with a manual photo of the physical units if a higher-res image is ever needed.

Verification

Impedance (4Ω), power (3W), and connector type (JST 1.25mm 2-pin) read directly from the Amazon listing title — high confidence for what's printed there. No independent datasheet exists for this generic/reseller part; physical dimensions and exact frequency response are unconfirmed.

Notes / gotchas

DWEII sells many near-identical speaker variants at different ohm/wattage/size combinations (1W/8Ω, 3W/8Ω, 10W/8Ω, etc.) — double-check the 4Ω/3W spec against the physical unit before assuming compatibility with a specific amp’s expected load.
No photo sourced yet — flag for a manual product photo next time these are handled.
Used in: Pocket Speaker