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.

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…

2.1 channel hi-fi audio amplifier circuit by Technical Mriganka, a 164 KB PDF. The title does not name the amplifier ICs or output devices, so identify them from the…

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…

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.

Hi-fi 2.1 amplifier schematic credited to SeahorseDIY, in a 688 KB PDF. It covers a stereo-plus-subwoofer layout, likely with the crossover or filter stage feeding the…

Apple iPhone 11 Pro diagram excerpt describing the earpiece receiver and its audio amplifier circuit, stored in a 314 KB RAR archive.

Circuit extract for the Apple iPhone 11 Pro covering the power amplifier supply circuit, packed as a 246 KB RAR archive.

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

Apple iPhone 11 Pro circuit material for the high-frequency power amplifier section, packed in a 430 KB RAR archive with no format details given in the name.

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

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

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 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…

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

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…

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

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.

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.

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

Datasheet for the OP07, a classic precision operational amplifier with very low input offset voltage and drift, widely used in instrumentation, sensor amplifiers and…

HA17324 reference in PDF form, 64.4 KB, for the Hitachi quad operational amplifier in the 324 family.

Tone control circuit intended for a 2.1 channel audio system, in a 159 KB PDF. It shows the bass and treble adjustment network that sits between the source or preamp and…

Speaker protection circuit for a 2.1 audio setup, a user-drawn design in a 139 KB PDF. Such boards normally delay relay engagement at power-up to stop thumps and…

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…

PDF document named after TAS5614LA, a Texas Instruments Class-D audio power amplifier IC used in audio equipment.