USB2Speakon
About the USB2Speakon PCB
USB2Speakon is an open source PCB design by RainbowLabsDE, published on GitHub under the CERN-OHL-W-2.0 license. It is a 4-layer board measuring 15 × 26 mm, with 48 components from 19 distinct parts.
Other key parts include the PCM2912A and TPA2012D2RTJR. By type, the board carries 27 capacitors, 14 resistors, 2 ICs, 2 jumpers, 1 crystal and 1 connector.
It belongs with the audio designs in this gallery.
From the project
Self-contained 5W Class-D amplifier inside a Speakon connector
A fully self contained, USB powered ~5W PMPO[^1] Class-D amplifier inside a Speakon connector. This adapter allows you to connect your phone / laptop / $USB-audio-host-capable device to any passive loudspeaker that accepts a Speakon plug. In my tests it reached volumes significantly above "room volume". Its output power is probably enough to host a small indoor party.
Main components on the USB2Speakon
USB2Speakon bill of materials (BOM)
48 components, 19 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | PCM2912A | TQFP-32_7x7mm_P0.8mm | U1 |
| 1 | TPA2012D2RTJR | QFN-20-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | U2 |
| 1 | C2901554 6MHz XO | OSC-SMD_4P-L3.2-W2.5-BL | X1 |
| 1 | USB_C_RECEPTACLE_USB2.0_16P USB_C_Receptacle_USB2.0_16P | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | G0 | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | G1 | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP2 |
| 1 | C99367 1uH / <0.6Ω | L_0805_2012Metric | L1 |
| 6 | 1u | C_0402_1005Metric | C1, C8, C11, C12, C14, C28 |
| 2 | 100P 100p | C_0402_1005Metric | C4, C5 |
| 2 | 3U3 3u3 | C_0402_1005Metric | C6, C10 |
| 6 | 100N 100n | C_0402_1005Metric | C7, C9, C23, C25, C27, C29 |
| 5 | 10U 10u | C_0402_1005Metric | C13, C16, C22, C24, C26 |
| 2 | 47N 47n | C_0402_1005Metric | C15, C17 |
| 4 | 470N 470n | C_0402_1005Metric | C18, C19, C20, C21 |
| 2 | 22 | R_0402_1005Metric | R1, R2 |
| 1 | 1K5 1k5 | R_0402_1005Metric | R3 |
| 2 | 100 | R_0402_1005Metric | R5, R6 |
| 7 | 33K 33k | R_0402_1005Metric | R7, R8, R9, R10, R11, R12, R15 |
| 2 | 5K1 5k1 | R_0402_1005Metric | R13, R14 |
USB2Speakon design files
The KiCad project lives in the RainbowLabsDE/USB2Speakon repository on GitHub; these links point at the commit this page was built from.
USB2Speakon: common questions
How big is the USB2Speakon PCB?
The USB2Speakon measures 15 × 26 mm, has 4 copper layers and is 0.7912 mm thick.
How many components are on the USB2Speakon?
48 components, from 19 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the USB2Speakon design files?
From the RainbowLabsDE/USB2Speakon repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the USB2Speakon design in my own project?
Yes, under the terms of its CERN-OHL-W-2.0 license, which RainbowLabsDE chose for the repository.
Similar boards
OtterCastAudioV2
Ottercast
50 × 49.3 mm216 parts4LMIT665
FunBox
GuitarML
59.7 × 67.5 mm63 parts2LMIT278
Eurorack pmod
apfaudio
35 × 110 mm116 parts4LCERN-OHL-S-2.0239
XassetteAsterisk
SdtElectronics
56 × 56 mm137 parts2LCERN-OHL-W-2.0229
AddOnC
freeDSP
380 × 45 mm97 parts2LCC-BY-SA-4.0222
AddOnA
178 × 39 mm55 parts2LCC-BY-SA-4.0222