Listings in Audio - Amplifiers - Power amplifiers - Class AB

Neurochrome

Neurochrome run by Tom Christiansen is based in Calgary, Canada. I founded Neurochrome in 2010 to provide well-designed high-end audio circuits to the DIY audio community and it quickly grew to a self-sustaining hobby. This early success provided me with...

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http://sjostromaudio.com/pages/index.php/hifi-projects/119-pa03-pavel-dudek-s-deluxe-gainclone

PA03 - The Czech Gainclone - based onLM4780

peranders

Click on the picture to get a larger view Click on the picture to get a larger view.Picture shows the input connector. Click on the picture to get a larger view.Picture shows the speaker outputs. The design is based on...

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QRP02 The SMD Gainclone - high performance mono power amplifier

peranders

QRP-02 - The first SMD Gainclone amplifier in the world(?) Click on the picture to get a larger view. The world's frist DIY SMD Gainclone Specifications for the new advanced Gainclone. 50 um pcb with groundplane Fast recovery rectifier diodes...

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QRP01 The Gainclone - high performance power amplifier

peranders

Gainclone - The most popular amplifier in the world(?) A LM3886 from National Semiconductor. The heart of a Gainclone. It took a while to understand what "GC" was, or Gainclone. What a name! A couple of IC's (LM3875, LM3876 and LM3886) from National...

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http://sjostromaudio.com/pages/index.php/hifi-projects/130-qrv09-headphone-amp

QRV-09 - The ultra high performance SMD headphone amplifier

peranders

Click on the picture to see a larger view of the pcb. The performance is outrageous in headphone amp terms. See the technical data! Interesting features: The pcb fits virtually any single opamp Room for good coupling caps (if you must or like)...

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http://sjostromaudio.com/pages/index.php/hifi-projects/129-qrv08-headphone-amp

QRV-08 The high performance smd headphone amp with quadruple super regulators

peranders

Click on the picture to see a larger view of the pcb. The performance is outrageous in headphone amp terms. See the technical data! Interesting features: High speed, low distortion current feedback design. All discrete design of the amp itself...

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http://sjostromaudio.com/pages/index.php/hifi-projects/128-qrv07-headphone-amp

QRV-07 - The ultra high performance SMD headphone amplifier

peranders

Click on the picture to see a larger view of the pcb. The performance is outrageous in headphone amp terms. See the technical data! Interesting features: The pcb fits virtually any single opamp Room for good coupling caps (if you must or like)...

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http://sjostromaudio.com/pages/index.php/hifi-projects/127-qrv06-headphone-amp

QRV-06 The Current Feedback Headphone Amplifier with SMD Diamond Buffer

peranders

Click on the pictures to get a larger view. The performance is very good. See the technical data! Interesting features: Extremely low distortion, approx: 0.00046% Extremely fast, > 25 MHz, 3000 V/µs The pcb fits virtually any SOT23 small...

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http://sjostromaudio.com/pages/index.php/hifi-projects/126-qrv05-diamond-buffer

QRV-05 - The high performance SMD Diamond buffer

peranders

The component side and also solder side. The component print The performance is very good. See the technical data! Interesting features: The pcb fits virtually any SOT23 small signal transistor and almost any SOT223 power...

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http://sjostromaudio.com/pages/index.php/hifi-projects/125-qrv04-headhone-amp

QRV-04 - The high performance SMD headphone amplifier with multiple feedback

peranders

Click on the picture to see a preview of the pcb. Interesting features: The pcb fits virtually any single opamp with or without offset trim. Room for good coupling caps (if you must or like), both SMD and regular hole mounted, if you are having...

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http://sjostromaudio.com/pages/index.php/hifi-projects/124-qrv03-headphone-amp

QRV-03 - The high performance current feedback headphone amplifier

admin

This headphone amplifier design is based on a patent by Mark Alexander. It's a patented current feedback design. Design by Per-Anders Sjöström. You may take a look in the application note AN-211 from Analog Devices. Click on the picture to get a larger...

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http://sjostromaudio.com/pages/index.php/hifi-projects/123-qrv02-headphone-amp

QRV-02 - The high performance headphone amplifier with multiple feedback

admin

Click on the picture to get a larger view. I designed this amplifier as a result of reading postings at HeadWize. The forum is I'm afraid closed down. I call it "underkill amp" or "Cmoy deluxe". The performance is outrageous in headphone amp terms...

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http://sjostromaudio.com/pages/index.php/hifi-projects/122-qrv01-headphone-amp

QRV-01 - The extreme headphone amplifier

admin

Click on the picture to get a larger view. I designed this amplifier 1986 and I felt like publishing it now. The excellent MOSFETs from Supertex Inc are hard to get these days (not impossible) so therefore the amp needed to be redesigned a little bit...

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Zero Feedback Transformer Audio Power Amplifier without feedback

admin

This woman(!), Susan Parker has designed an very odd amplifier which has no feedback and only two active devices. Very rare, indeed.

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The M250 amp

admin

This swedish gentleman has done a nice power amp with simple means, no CAD for instance. Hand drawn schematics and hand taped pcb layout.

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http://leachlegacy.ece.gatech.edu/lowtim/

The Leach SuperAmp

admin

Professor W. Marshall Jr. Leach have designed a very interesting power amp with high slew rate.

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The Home of Graham Stephen Maynard's GEM

admin

An interesting class A amp designed by Graham Maynard.

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Panson Audio Laboratoriesc

admin

Nice LM49810 based amplifier.

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Monster's DIY Audio

admin

DIY audio projects : 300W 6xLM3886 paralleled-bridged, 100W 2xLM3886 paralleled, Regulated LM3875 GainClone, AD1955 DAC, Vifa XT25 MG18 MTM speaker, Speaker simulation using Orcad.

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