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…

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

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…

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…

PDF for the KA4558, a dual operational amplifier in the KA series, equivalent in function to the familiar 4558 dual op amp, size 121 KB.

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.

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

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

A 281 KB PDF datasheet for the TL071, the low-noise JFET-input operational amplifier common in audio preamplifiers, mixers and measurement circuits.

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…

PDF for the KIA324P, a KEC quad operational amplifier compatible with the widely used LM324, in a DIP package as the P suffix suggests.

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

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…

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

Archive named RC4559, 343 KB, with no brand listed. RC4559 is the part number of a dual operational amplifier, so the contents are most likely the datasheet for that IC…

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

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…

Matrix 1.4 amplifier design in BTL configuration, meaning bridge-tied load where two amplifier halves drive the speaker in opposite phase, as a 1.76 MB PDF.

Large 962 KB PDF for the LM324P, the quad operational amplifier in a plastic DIP package, as the P suffix commonly indicates.

Schematic PDF for the DXA 1802, size 1.63 MB, matching the name of an Ahuja public address amplifier model, although the brand is not stated in this name.

Service schematic for the Bose AM15P, as named in the file, likely an amplifier or powered bass module from an Acoustimass-type speaker system.

PDF of 6.86 MB titled for an XTi series, with no brand given in the name. Crown sells a power amplifier line called XTi, so the document may relate to it, but contents…

Datasheet for the DAC0808, an 8-bit multiplying digital-to-analog converter with current output, compatible with the MC1408 family.

Modified schematic for the Yamaha PA-2400 power amplifier, an 83 KB PDF marked as version 1 and apparently a copy of an earlier file.

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…

Portuguese PDF of 70.8 KB on audio in LCD televisions, a short technical note rather than a model-specific service diagram, with no brand or chassis named.

Schematic document in PDF format, about 1.80 MB, filed under the name TAS6534, which looks like a Texas Instruments part number from the TAS automotive class-D 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…

Infineon datasheet for the IRS20957SPBF, document version 1.02 in English, as a 457 KB PDF.

Updated schematic for the IRS D900 class D amplifier, rated from 200 to 500 W and credited to Rat Net, in a 423 KB PDF.

PDF datasheet (337 KB) for the AD7533, a 10-bit multiplying DAC from Analog Devices often used for programmable gain, attenuation and voltage setting in older…

Matrix 1.4 amplifier document tagged WS3, likely a variant or board revision label, in a 978 KB PDF. The name does not state power rating or load.

Circuit diagram for a two-way active audio crossover, supplied as a 134 KB PDF. The name gives no designer, part numbers or crossover frequency, so expect a generic…

Compact PDF schematic whose name points to a parametric equalizer combined with a subwoofer filter stage.

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

Equalizer circuit diagram supplied as a 263 KB PDF. The file name only says equalizer and gives no brand, model or board reference, so it cannot be tied to a particular…

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.

STK4121V datasheet in PDF format, 92 KB, covering a hybrid audio power amplifier module from the Sanyo STK series.

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…