URL Collection of Commercial Single Ended Integrated and Power Amplifier Devices

URL Collection of Commercial Single Ended Solid State Integrated and Power Amplifier Devices

After read the article "Single Ended Class A" from Nelson Pass about www.firstwatt.com/downloads/seclassa.pdf and after simulation and test of a wide range of different circuit designs I hate the so called "True Complementary" circuit designs for output power stage, because the true complementary power transistor pair is for me a mythos resp. a tall story. The perfect symmetric character exist in the mind of most well-known famous designers so as on the schematic diagrams, but not in real life; both by BjTs and MOSFETs. Nevertheless - unfortunately most of the audio amplifier designs are make in this kind (or I find designs with output tubes).
Therefore the follow URL collection of all commercial amplifiers with output circuit solid state designs without the so called "True Complementary". I have found all listed URLs below on the web in the last years.

If URL already death, please use http://www.archive.org/web/web.php and copy this death link about right click.You get a chronology overvview. At second step you choise the wanted date of the archived webstite. For example:
www.passlabs.com - copy in http://www.archive.org/web/web.php - click on "Apr.06.1997" and you see the website from "Daddy Pass" in the Aleph aera 12 years ago.
(http://web.archive.org/web/19970406103257/www.passlabs.com/products.htm)

SE versions with very high idle current (> 4A) and low output power (arround 5W) especially for high quality tweeter drive (e. g. SA8535 from Stage Accompany) in bi-amping systems, I found nothing.

I hope, for some members this list offer a good overview. It is very hard to find such overview on other places in the web, because the most designs of amplifiers - as mentioned earlier - based of complementary transistor pairs.
If not, I have to do in most cases with tube (valve) output power stages.

Perhaps some members know about additional interesting URLs from commercial brands.
Please excuse my not perfect english - I work with the language tools by google.


BEAR Labs "SE-MOSFET"
http://www.bearlabsusa.com/
http://web.archive.org/web/20060620064351/www.bearlabsusa.com/NEXT/SEMosfet-B&W.JPG
bluecircle "BC-2"
http://www.soundstage.com/das_bc2.htm (Test blue circle BC-2 foto in Soundstage 1/97)
Buscher (Modul, Gain stage + POWER SE AMP)
http://www.buscher-endstufen.de/
Greenwall "Julio" and "Small One"
http://web.archive.org/web/*/http://www.greenwall.de/de/julio.htm (Audiophile 1/2001)
http://web.archive.org/web/*/http://www.greenwall.de/de/smallone.htm (Image-Hifi 6/97)
INnovative Audio "Ultrapath"
http://www.innovative-audio.de/ Single Ended Mono Poweramplifier
http://www.innovative-audio.de/produkt Eintaktmonoend.htm
Marchand "EC 616"

http://www.marchandelec.com/ec616.html
http://www.tnt-audio.com/ampli/march_ec626_e.html
passlabs (wide range of SE Versions)
(Nelson Pass, X-Series, XA-Series, AlephO Series, Aleph-Series and "First Watt")
www.passlabs.com und www.passdiy.com
Paravicini "M 100 A" (SE + Transformer)
M100A, M100 A, M 100A (Test in Image-HiFi, 4/2001)
http://www.envogue-24.de/Neue Seiten/ear/M100A.html
http://www.hometheaterreview.com/eq...ravicini_m100a312_tube_amp_reviewed002186.php
Pathos "TT" ("Twin Tower", SE Sourcef. + Inductor)
Model TT (Twin Towers) Integrated Amplifier SE
http://www.pathosacoustics.com/twineng.htm
www.highend.cz/productpages/pathos/testy/1999-02TTTheAbsoluteSound.pdf
Sudgen A21SE Series
SE = "Single ended" not "Special Edition" Test in Image HiFi 3/2007
http://www.sugdenaudio.com/range/overview3.htm
www.roksan.de/productsites/manuals/sugden/sugmus.pdf
http://www.soultosoleaudio.com/pdf/Sugden Masterclass Hi Fi World December 2007.pdf
Valvet E1
http://www.valvet.de/bricks/e1/ (Test in "Hörerlebnis" Nr. 61)
http://www.valvet.de/presse/
http://www.highend-electronics.com/16.html
http://www.audiogon.com/cgi-bin/cls.pl?ampstran&1249765888
Ypsilon "VS 100" "YS 100"
http://www.amadeus-audio.co.uk/ypsilon/vs-100.htm (VS-100 YS-100)
http://www.amadeus-audio.co.uk/ypsilon.html (Übersicht)
royaldevice "BLU BAY" (driver transf. + SEPP Power-Amp)
http://www.royaldevice.com/BluBayEng.htm
http://www.royaldevice.com/BEmeasures.htm
http://www.royaldevice.com/BEschemaeng.jpg
 
Last edited:
  • Like
Reactions: 1 user
A new power amplifier from Reimyo:
model KAP-777
perhaps a "Single Ended" classA
about
REIMYO KAP-777 Power Amplifire
I read
It’s a unique Single Mos FET driven power amplifier
Perhaps Class-G with Single Ended Class-A main part (see data for output power)?
Who knows more?
 

Attachments

  • Reimyo KAP 777-front.jpg
    Reimyo KAP 777-front.jpg
    307.2 KB · Views: 1,192
  • Reimyo KAP 777-rear.jpg
    Reimyo KAP 777-rear.jpg
    204.6 KB · Views: 1,147
  • Reimyo KAP 777-open top view.jpg
    Reimyo KAP 777-open top view.jpg
    196.1 KB · Views: 1,158
  • Reimyo KAP 777-open top view Rifa caps.jpg
    Reimyo KAP 777-open top view Rifa caps.jpg
    213.5 KB · Views: 1,148
Last edited:
Update post #1:
BEAR Labs "SE-MOSFET"
BEAR Labs - Audiophile Equipment
http://web.archive.org/web/20060620064351/www.bearlabsusa.com/NEXT/SEMosfet-B&W.JPG
bluecircle "BC-2"
SoundStage! Equipment Review - Blue Circle BC-2 (01/1997) (Test blue circle BC-2 foto in Soundstage 1/97)
Buscher (Modul, Gain stage + POWER SE AMP)
Home Andre Buscher Audiotechnik - Andre Buscher Audiotechnik - Puristische Eintaktverstarker
Greenwall "Julio" and "Small One"
Wayback Machine (Audiophile 1/2001)
http://web.archive.org/web/*/http://www.greenwall.de/de/smallone.htm (Image-Hifi 6/97)
INnovative Audio "Ultrapath"
http://www.innovative-audio.de/ Single Ended Mono Poweramplifier
http://www.innovative-audio.de/produkt Eintaktmonoend.htm
Marchand "EC 616"
http://www.marchandelec.com/ec616.html
http://www.tnt-audio.com/ampli/march_ec626_e.html
passlabs (wide range of SE Versions)
(Nelson Pass, X-Series, XA-Series, AlephO Series, Aleph-Series and "First Watt")
www.passlabs.com und www.passdiy.com
Paravicini "M 100 A" (SE + Transformer)
M100A, M100 A, M 100A (Test in Image-HiFi, 4/2001)
https://web.archive.org/web/20080625224540/http://www.envogue-24.de/Neue Seiten/ear/M100A.html
https://web.archive.org/web/2009012...ravicini_m100a312_tube_amp_reviewed002186.php
Pathos "TT" ("Twin Tower", SE Sourcef. + Inductor)
Model TT (Twin Towers) Integrated Amplifier SE
https://web.archive.org/web/20080204152656/http://www.pathosacoustics.com/twineng.htm
http://www.audioaffair.co.uk/pathos-tt-remote-reference-integrated-amplifier
www.highend.cz/productpages/pathos/testy/1999-02TTTheAbsoluteSound.pdf
Sudgen A21SE Series
SE = "Single ended" not "Special Edition" Test in Image HiFi 3/2007
https://www.sugdenaudio.com/a21se-integrated-amplifier
Valvet E1
http://valvet.de/?lang=en
https://web.archive.org/web/20090223015620/http://www.valvet.de/bricks/e1/ (Test in "Hörerlebnis" Nr. 61)
Ypsilon "VS 100" "YS 100"
http://www.amadeus-audio.co.uk/ypsilon/vs-100.htm (VS-100 YS-100)
http://www.amadeus-audio.co.uk/ypsilon.html (Übersicht)
royaldevice "BLU BAY" (driver transf. + SEPP Power-Amp)
https://web.archive.org/web/20081216052432/http://www.royaldevice.com/BluBayEng.htm
http://www.royaldevice.com/BEmeasures.htm
http://www.royaldevice.com/BEschemaeng.jpg

A friend of me is looking for a commercial single ended solid state power amp, that is build as easy as possible, i. e. according one of this both
projects (only one transistor in the signal path):

1) Pass ZEN - go to
https://www.passdiy.com/project/amplifiers/zen-variations-1
2) Andrea Ciuffoli's Power Follower 99
http://www.audiodesignguide.com/my/Follower_99c.gif
http://www.audiodesignguide.com/articles/Power_Follower/Electronics_World_pg2.jpg
http://www.audiodesignguide.com/articles/Power_Follower/Electronics_World_pg3.jpg

Which commercial products are currently on the marked ?
Thank you very much for advices.
 
Last edited:
A friend of me is looking for a commercial single ended solid state power amp, that is build as easy as possible, i. e. according one of this both
projects (only one transistor in the signal path):

1) Pass ZEN - go to
https://www.passdiy.com/project/amplifiers/zen-variations-1
2) Andrea Ciuffoli's Power Follower 99
http://www.audiodesignguide.com/my/Follower_99c.gif
http://www.audiodesignguide.com/articles/Power_Follower/Electronics_World_pg2.jpg
http://www.audiodesignguide.com/articles/Power_Follower/Electronics_World_pg3.jpg
Which commercial products in this circuit design are currently on the marked (except Buscher Audio from Germany) ?
Thank you very much for any advice.
 
Bought the Audiophile 1/2001. German magazine. I wanted to look into the Greenwall Julio;-)
Per channel: One IRFP 150 as amplifier. As constant current source probably two IRFP 140, with a small TO-92 as driver.
These components, whether MosFets or electrolytic capacitors, are not chosen according to sonic considerations - I had heard comparatively meanwhile.
Many suggestions to revise these devices to bring out still quite a lot sonically!
 

Attachments

  • DSCN0299[1].JPG
    DSCN0299[1].JPG
    420.8 KB · Views: 38
  • DSCN0297[1].JPG
    DSCN0297[1].JPG
    510.2 KB · Views: 31
  • DSCN0296[1].JPG
    DSCN0296[1].JPG
    540.9 KB · Views: 31
  • DSCN0294[1].JPG
    DSCN0294[1].JPG
    455 KB · Views: 34
  • DSCN0292[1].JPG
    DSCN0292[1].JPG
    494.5 KB · Views: 31
  • DSCN0291[1].JPG
    DSCN0291[1].JPG
    365.7 KB · Views: 37
  • DSCN0301[1].JPG
    DSCN0301[1].JPG
    401.2 KB · Views: 33