Pr2-usb headphone amplifier
About the Pr2-usb headphone amplifier PCB
Pr2-usb headphone amplifier is an open source PCB design by seanahuynh, published on GitHub. It is a 4-layer board measuring 80 × 55 mm, with 62 components from 36 distinct parts.
Other key parts include the PCM2704CDBR, LM27762DSSR, OPA1622IDRCT and USBLC6-2SC6. By type, the board carries 25 capacitors, 25 resistors, 4 ICs, 4 switches, 2 connectors and 1 transistor.
It belongs with the audio designs in this gallery.
From the project
My amplifier design for USB-C DAC headphones. Contains volume control, mute/unmute functions. Designed in KiCad. Includes schematics, PCB layout, BOM, and fabrication files. Unbuilt prototype.
USB-C audio and power · 3.5 mm stereo output · Volume and mute controls · KiCad 10
An editable KiCad 10 prototype for the KZ x HBB PR2 in-ear monitors. PC USB-C data/power feeds a stereo DAC and headphone amplifier with a 3.5 mm TRS output, volume buttons, USB mute and independent hardware mute. The USB microphone is outside this design.
Status: routed, CAD-checked, unbuilt revision A. Prototype fabrication outputs are included. Electrical performance, USB compliance and mechanical fit have not been established on hardware. No components, boards or assembly services have been ordered. Begin…
Main components on the Pr2-usb headphone amplifier
Pr2-usb headphone amplifier bill of materials (BOM)
62 components, 36 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | PCM2704CDBR Texas Instruments | SSOP-28_5.3x10.2mm_P0.65mm | U1 |
| 1 | LM27762DSSR Texas Instruments | WSON-12-1EP_3x2mm_P0.5mm_EP1x2.65 | U2 |
| 1 | OPA1622IDRCT Texas Instruments | VSON-10-1EP_3x3mm_P0.5mm_EP1.65x2.4mm | U3 |
| 1 | USBLC6-2SC6 STMicroelectronics | SOT-23-6 | U4 |
| 1 | MMBT3904LT1G MMBT3904 onsemi | SOT-23 | Q1 |
| 1 | ABM8-12.000MHZ-B2-T 12 MHz Abracon | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | USB4105-GF-A USB-C GCT | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
| 1 | SJ1-3533NG 3.5 mm TRS Same Sky | Jack_3.5mm_CUI_SJ1-3533NG_Horizontal | J2 |
| 1 | B3F-1000 VOL - Omron | SW_PUSH_6mm | SW1 |
| 1 | B3F-1000 VOL + Omron | SW_PUSH_6mm | SW2 |
| 1 | B3F-1000 USB MUTE Omron | SW_PUSH_6mm | SW3 |
| 1 | JS102011SAQN HARD MUTE C&K | SW_SPDT_CK_JS102011SAQN | SW4 |
| 5 | C1608X7R1H104K080AA 100n TDK | C_0603_1608Metric | C1, C9, C15, C22, C23 |
| 2 | C1608C0G1H270J080AA 27p TDK | C_0603_1608Metric | C2, C3 |
| 5 | C1608X7R1C105K080AC 1u TDK | C_0603_1608Metric | C4, C5, C6, C7, C8 |
| 6 | C2012X7R1C475K125AB 4.7u TDK | C_0805_2012Metric | C10, C12, C13, C14, C24, C25 |
| 1 | C2012X7R1H105K125AB 1u TDK | C_0805_2012Metric | C11 |
| 2 | C1608C0G1H472J080AA 4.7n TDK | C_0603_1608Metric | C16, C19 |
| 2 | C3216X7R1H105K160AB 1u TDK | C_1206_3216Metric | C17, C20 |
| 2 | C1608C0G1H101J080AA 100p TDK | C_0603_1608Metric | C18, C21 |
Show 16 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | ERJ3EKF5101V 5.1k Panasonic | R_0603_1608Metric | R1, R2 |
| 2 | ERJ3EKF22R0V 22 Panasonic | R_0603_1608Metric | R3, R4 |
| 2 | ERJ3EKF1501V 1.5k Panasonic | R_0603_1608Metric | R5, R7 |
| 1 | ERJ3EKF1004V 1M Panasonic | R_0603_1608Metric | R6 |
| 1 | ERJ3EKF1743V 174k Panasonic | R_0603_1608Metric | R8 |
| 2 | ERJ3EKF1003V 100k Panasonic | R_0603_1608Metric | R9, R11 |
| 1 | ERJ3EKF1703V 170k Panasonic | R_0603_1608Metric | R10 |
| 1 | ERJ3EKF1002V 10k Panasonic | R_0603_1608Metric | R12 |
| 1 | ERJ3EKF4702V 47k Panasonic | R_0603_1608Metric | R13 |
| 1 | ERJ3EKF2212V 22.1k Panasonic | R_0603_1608Metric | R14 |
| 1 | ERJ3EKF1072V 10.7k Panasonic | R_0603_1608Metric | R15 |
| 2 | ERJ3EKF3300V 330 Panasonic | R_0603_1608Metric | R16, R21 |
| 2 | ERJ3EKF2202V 22k Panasonic | R_0603_1608Metric | R17, R22 |
| 2 | ERA3AEB102V 1k Panasonic | R_0603_1608Metric | R18, R23 |
| 2 | ERA3AEB202V 2k Panasonic | R_0603_1608Metric | R19, R24 |
| 2 | ERJ3RQFR47V 0.47 Panasonic | R_0603_1608Metric | R20, R25 |
Pr2-usb headphone amplifier design files
The KiCad project lives in the seanahuynh/pr2-usb-headphone-amplifier repository on GitHub; these links point at the commit this page was built from.
- LayoutPR2-USB-Amp.kicad_pcb
- SchematicPR2-USB-Amp.kicad_sch
- BOMBOM.csv
Pr2-usb headphone amplifier: common questions
How big is the Pr2-usb headphone amplifier PCB?
The Pr2-usb headphone amplifier measures 80 × 55 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Pr2-usb headphone amplifier?
62 components, from 36 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 Pr2-usb headphone amplifier design files?
From the seanahuynh/pr2-usb-headphone-amplifier 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 Pr2-usb headphone amplifier design in my own project?
The repository has no license, so all rights stay with seanahuynh. Use it as a reference, and ask the author before reusing the design.
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