PDF schematic for a 2.1-channel power amplifier, meaning two satellite channels plus a subwoofer channel.

iPhone 11 Pro circuit excerpt for the low frequency power amplifier circuit, packed into a 369 KB RAR archive.

Small PDF of about 3 KB titled as a DC power supply amperage guide, indexed as a schematic but likely a reference sheet rather than a board diagram.

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.

2.1 amplifier schematic attributed to Amiru, a compact 98.7 KB PDF. The name gives no details about the ICs or power level, so the diagram itself must be read for…

BIOS and EC firmware package for the Lenovo Z50-75 on LCFC board NM-A291, compressed into a ZIP of about 2.2 MB.

Power supply schematic for a chip amplifier, provided as a 497 KB PDF with a source tag in the name.

Archive covering Lenovo laptops on the Compal LA-H081P board, with the name listing the Flex 14, IdeaPad C340 and S540-14 and the Compal project codes EL4C1 and EL451.

Schematic for the PMA400 Lambda amplifier, a 400 W audio power amp design credited to Rat Net, supplied as a 477 KB PDF.

Spanish-language schematic for a stereo amplifier titled Zener, rated at 1000 W, in a 1.15 MB PDF.

Schematic of a Class H audio power amplifier, described in Spanish as a Thai design, delivered as a small 718 KB PDF.

Technical Mriganka 2.1 amplifier design using the TDA7379 and TDA7377 power amplifier ICs, a 206 KB PDF.

Book in PDF form, about 7.88 MB, covering valve and transistor audio amplifiers; the tag in the name only reflects where the copy was sourced.

2.1 amplifier schematic built around the TDA7294, by Technical Mriganka, in a 219 KB PDF.

Schematic of a 2.1 channel amplifier based on the TDA2030A, from Technical Mriganka, in a 416 KB PDF.

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…

Modified 2.1 channel amplifier schematic, a 90.6 KB PDF; the title does not say which original design was altered or which ICs are used.

Schematic for the 60 W NDFL amplifier published by ETI in 1983, combined with a regulated power supply, in a 6.74 MB PDF.

Datasheet PDF, 312 KB, for the LM324 quad op amp, listed in the schematic category without a manufacturer in the name.

Set of BIOS and EC firmware dumps for the Acer Aspire 8942G on the Quanta ZY9B board, compressed into a 1.61 MB 7z archive.

PDF document whose Persian title translates as datasheets of amplifier ICs, filed here as a schematic but in practice a reference collection for audio amplifier chips.

Datasheet for the TPA6047A4, a Texas Instruments stereo audio power amplifier, provided as a 1.98 MB PDF.

Schematic in PDF format for a bridged-tied-load subwoofer amplifier labelled 2050, where BTL means two amplifier halves drive the speaker in bridge mode for higher…

Datasheet for the TDA7294, a well-known high-power audio amplifier IC commonly found in hi-fi amplifiers, active speakers and DIY amplifier builds, supplied as a 1.13 MB…

PDF datasheet for the TDA7297, a dual bridge audio power amplifier IC commonly found in televisions, monitors and small amplifier boards.

PDF schematic of roughly 943 KB labelled TAS6514AL, a name that matches the Texas Instruments TAS series of automotive class-D audio amplifier ICs; no product, board…

Short 100 KB PDF datasheet for the STK465, a thick-film hybrid audio power amplifier module from the Sanyo STK range.

Schematic in PDF form, 2.03 MB, for a subwoofer identified in the name as e150p. No manufacturer or board revision is stated, so confirm the model label on the enclosure…

Schematic, per the sch suffix, for the Audio Pro Ace Bass B2-70 subwoofer. The 546 KB PDF covers the built-in amplifier, likely including the ACE-Bass circuitry, Audio…

Zener mono power amplifier rated 500 W, documented in a 952 KB PDF. The name gives no revision or further details, so verify the content on opening, which may include…

Small 26.2 KB PDF, filed as a datasheet, holding a schematic of a Class D amplifier rated around 200 W RMS that uses two MOSFETs in its output stage.

Datasheet PDF for the 2SK1058, a 55 KB file. This part number belongs to the 2SK series of N-channel field-effect transistors and is widely known from audio power…

Sallen-Key subwoofer filter schematic as a 389 KB PDF, with a source tag in the file name.

PDF schematic of the HT-S40R home theatre system, about 1.50 MB, the name carries no board number or revision.

Circuit schematic for the subwoofer 7294 project, version 1.1, a 55 KB PDF. The name suggests an amplifier built around the TDA7294 audio power IC, but the PDF itself…

Small 173 KB PDF named dos vas, a short and uninformative title that most likely refers to a dual VAS layout, the voltage amplifier stage of a class AB power amplifier.