Sansui AU-D101

bleachershane · 30th September 2012, 02:28 PM

I've just picked up a Sansui AU-D101 on eBay.
I thought I'd give the basic bid a go and won it at 99p plus postage.

Trouble is there hardly ANY documentation out there about this amplifier.

Wikipedia turns this up: "In the UK around 1982, the Sansui AU-D101 amplifier and its more powerful sibling the AU-D33, were highly acclaimed by audiophiles and were so well matched to a pair of KEF Coda III speakers that they could be bought as a set from some outlets. These amplifiers used a complex feed-forward servo system which resulted in very low 2nd order harmonic distortion. Despite this success, Sansui completely failed to follow up with further mass market audiophile components."

Anyone else have own one, have experience or a service manual, etc?

My only plans so far are for an electrolytic recap...

Ian Finch · 1st October 2012, 12:06 AM

I read that that these use a similar design and circuit to AU D33/22 models. There is a passable Service Manual at Hifiengine that also describes the operation which is interesting on its own, for wannabe designers. Best of luck!

Sansui AU-D33 | Owners Manual, Service Manual, Schematics, Free Download | HiFi Engine

wahab · 1st October 2012, 12:50 AM

That s one of those ubiquitous low distorsions amps using a three stage
topology for voltage amplification as well as a triple EF output stage on
the bolder designs.

It seemed that Sansui wasnt the most advanced at this time
since JVC refined this topology with a non switching circuitry
as early as 1979 with their AX series , notably the AX5 and beyond.

JVC A-X5 | Owners Manual, Service Manual, Schematics, Free Download | HiFi Engine

30th September 2012, 02:28 PM	#1
bleachershane diyAudio Member Join Date: Jun 2008 Location: Glasgow, Scotland	Sansui AU-D101 I've just picked up a Sansui AU-D101 on eBay. I thought I'd give the basic bid a go and won it at 99p plus postage. Trouble is there hardly ANY documentation out there about this amplifier. Wikipedia turns this up: "In the UK around 1982, the Sansui AU-D101 amplifier and its more powerful sibling the AU-D33, were highly acclaimed by audiophiles and were so well matched to a pair of KEF Coda III speakers that they could be bought as a set from some outlets. These amplifiers used a complex feed-forward servo system which resulted in very low 2nd order harmonic distortion. Despite this success, Sansui completely failed to follow up with further mass market audiophile components." Anyone else have own one, have experience or a service manual, etc? My only plans so far are for an electrolytic recap... __________________ "If only we'd known that iPads would unite to enslave the people they entertained."

1st October 2012, 12:06 AM	#2
Ian Finch diyAudio Member Join Date: Apr 2010 Location: Coffs Harbour, on the east coast	I read that that these use a similar design and circuit to AU D33/22 models. There is a passable Service Manual at Hifiengine that also describes the operation which is interesting on its own, for wannabe designers. Best of luck! Sansui AU-D33 \| Owners Manual, Service Manual, Schematics, Free Download \| HiFi Engine __________________ regards

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1st October 2012, 12:50 AM	#3
wahab diyAudio Member Join Date: Nov 2009 Location: algeria/france	That s one of those ubiquitous low distorsions amps using a three stage topology for voltage amplification as well as a triple EF output stage on the bolder designs. It seemed that Sansui wasnt the most advanced at this time since JVC refined this topology with a non switching circuitry as early as 1979 with their AX series , notably the AX5 and beyond. JVC A-X5 \| Owners Manual, Service Manual, Schematics, Free Download \| HiFi Engine