Partial Quanta schematic covering only the audio connector circuitry shared by the ZR1 and ZR2 board projects, a small 79.5 KB PDF.

Boardview for the Apple audio board 820-1733, supplied inside a RAR archive. A boardview maps the component placement, pin nets and test points of the PCB, so you can…

Diagram of a 2.1 preamplifier joined to an audio power amplifier, taken from a YouTube project; the doubled pdf extension is just a naming slip.

Archive for the Apple audio board 820-2136, a 137 KB RAR file covering the daughterboard that handles audio connections.

Schematic of a 1000 W audio power amplifier rated into 2 ohms, marked R2, RLVA SE1, 2012 revision 1, in a 110 KB PDF.

Realtek audio driver bundle, version 6.0.1.8273, marked WHQL, meaning it passed Microsoft hardware certification.

Power-supply service schematic for the Audio Pro AP3000, based on the pwr and sm tags in the name.

Service manual for the Audio Pro B1.35 MK2 subwoofer, read from the B1_35MK2, sub and sm tokens in the name.

Small 124 KB PDF schematic covering the audio and USB daughterboard used with Sony mainboard MBX-165, platform code MS90.

Audio Pro Ace Bass A101 service manual, with the int tag suggesting an integrated amplifier, though the name does not state this firmly.

Service schematic for the Audio Pro A2, supplied as a 542 KB PDF; the int-sm suffix most likely marks an international service manual edition.

Audio Power Amplifier Design by Douglas Self, a 13.7 MB PDF book. The title is a well-known engineering reference on solid-state amplifier topologies, distortion…

Audio Pro Ace Bass B2-40 subwoofer service manual in PDF form, about 1.96 MB, as indicated by the sub and sm tags.

Service documentation for the Audio Pro Ace Bass B1-45 subwoofer, going by the sub and sm tags.

PDF schematic of a low pass filter built around the 5532 dual op-amp, intended to feed an audio power amplifier, 126 KB in size; the name suggests it was shared…

Service manual PDF for the Audio Pro Ace Bass B2-50 subwoofer, named with the sub and sm tags.

Second part of the service manual for the Audio Pro A4-14 speaker, going by the spk and sm2 tokens.

First part of the service manual for the Audio Pro A4-14 speaker, a 6.15 MB PDF identified by the spk and sm1 tokens and paired with a second volume.

Archive for the Compal LS-6122P audio and USB sub-board, revision 1.0, tagged with the NCL50 platform code and the UMA variant, meaning integrated graphics.

Archive for Apple board 820-1699, the LIO audio board (likely the left I/O board), with drawing number 051-6951 at revision 03003 and the labels BUZZ and M1 in the name.

Schematic PDF for the audio and USB daughterboard used with the Sony MBX-165 platform in its MS90 version.

Service manual for the Audio Pro Ace Bass B1-39 subwoofer, a compact 272 KB PDF that likely holds the core amplifier schematic and perhaps a parts list.

Large firmware archive for car audio units, around 1.89 GB, with no brand, model or board number given in the name.

BIOS archive for the ASUS FX516PE and FX516PC laptops, main board revision R7.0, from a unit with an 11th generation Core i5, packed as a 7.50 MB RAR.

Android application package, version 1.0.0, named as a photo, video and audio recovery tool, meant for attempting to restore deleted media files on a phone.

Large software archive of about 267 MB described as audio chipset drivers for Chromebooks, with a misspelled name. No specific models, codecs or versions are stated.

Realtek ALC269 audio codec datasheet in PDF form, 1.25 MB; the extra (1) in the name only marks a duplicate copy.

Audio page of the Samsung SM-A30S (Galaxy A30s) schematic, covering microphone, loudspeaker and earpiece circuits, saved as a 4.30 MB PDF.

Handsfree (headset) section of the Samsung SM-A20S schematic, a 2.07 MB PDF. It shows the headphone jack connections, detection line, audio left and right outputs and…

Handsfree and headset audio section of the Samsung Galaxy A12 (SM-A12) schematic, 3.39 MB PDF.

C-Media audio driver package for 64-bit Windows, marked as WHQL certified, in a 3.42 MB zip.