u/Spiricraft1

Diy 4s lithium batterie for bluetooth speaker

Hi!

I'm building a 4S battery pack using 3.7V lithium cells. I bought a USB-C power module to charge them. I want the pack to power a 100W amplifier, which means a maximum current draw of 8A when the pack is drained (12V). I wanted to know if I could connect the amplifier directly to the power module's output, or if I need a different setup (like adding a BMS for the discharge path, for example). Thanks!

The module's part number is in the photo.

u/Spiricraft1 — 1 day ago

▲ 1 r/diyaudio

4" Woofer for a tiny 2L 360° Bluetooth build (Budget ~50€)

Hello!

I'm building a compact DIY Bluetooth speaker, aiming for JBL Charge 5 levels of bass but in a custom 2L enclosure. I'm planning a 2-way vertical 360° design with a deflector and a passive radiator.

I was looking at the SB12NRXF25-4, but its Vas (4L) seems too high for my 2L target. Does anyone know a high-excursion 4" woofer with a very low Vas (around 2L) that can actually dig deep in such a small box? Budget is around 50€ for the woofer. Thanks!

reddit.com

u/Spiricraft1 — 3 months ago