8000uF MKP Caps for Krell MRA = Master Reference Amplifier - Schematic wanted

[tiefbassuebertr]

I need a detailled schematic diagram from the power amplifier about
Krell mra image by MrAcoustat on Photobucket
developed from
http://www.audioreference.de/content/krell/krell/pic_krell_01.jpg

Here some additional weblinks about this power amp:
StereoTimes - Event - A Visit to Krell by Steve Ekblad
http://www.premieraudio.ca/uploads/images/MRA_Amp.jpg
http://www.audio-kontakt.com/forum/nalozeno/AUIOOA-1236635113Krell_MRA3.jpg
www.audio-kontakt.com :: Poglej temo - Trafo in watti (scoll down for three additional photos)

I need it for calculate a new ultimate quality (external) power supply for a currently user. There are Wilson Audio X1 (X-1) loudspeakers in use like the follow
http://bedzine.com/blog/wp-content/uploads/2009/04/alexandria_wilson_audio2_vl3ls_12.jpg

Because there are now big monolitic MKP capacitors (8000 uF !!!) in ultimate quality on the market, a great enhancement in sonic quality must be possible (compare to the original conditions).
http://www.powersmartsystems.ru/files/icar/lnk/LNK-P5X.pdf
I have even heard about monothitic 50.000 uF MKP, unfortunately I haven't see, because this must be custom made devices in very large sizes.

Unfortunately one must be calculate very high costs for such cases (much more than the best available electrolytic capacitors) and it must be present absolutely perfect inrush current limiting devices (because internal resistance near zero ohms).

Due such high costs by this kind of capacitors even by the world's most expensive amplifier such capacitors are not in use, e. g. FM Acoustic, Ultrasound, Audionote, Goldmund, Halcro and some more - look about
HigherFi-Ultimate - The Worlds Best and Most Expensive Audio Amp and Amplifier
Therefore the highest possible sonic quality is still hard limited, regardless of the price range and and regardless of the advertising slogans

I am very happy to get a service manual (at least a schematic about power supply)
of the Krell "Master Reference Amplifier" to realize this power supply project

 

[tiefbassuebertr]

Here some additional MKP capacitors up to 24000 uF ( !!! )

 

[Luke]

impressive, any idea where to get these?

 

[tiefbassuebertr]

impressive, any idea where to get these?

From there:
ELECTRONICON Kondensatoren und Filterkreis Drosseln > Home > HOME
cause the exhibition start "HANNOVER MESSE 2010" today try to ask in two weeks
ask there (button "Kontakt") for your local distributor
An English homepage version is now also available.

Service Manual for Krell "Master Reference Amplifier" still needed.

 

[tiefbassuebertr]

schematic for this amplifier still wanted

 

[mr l]

krell don't release schematics, good luck!

 

[h_a]

Because there are now big monolitic MKP capacitors (8000 uF

With 18kg not really lightweight 😉

Hannes

EDIT: if you have access to the amp, why not trace out the schematic and make everybody happy here?

 

[tommy1000]

schematic for this amplifier still wanted

This is the best I can find. There are 48 capacitors in total in the power supply. I think they are made by epcos.

 

[tiefbassuebertr]

krell don't release schematics, good luck!

Even Accuphase release their schematics - go to
http://wegavision.pytalhost.com/accuphaseM-1000p/
perhaps one of the member have perform a "reverse engineering".

 

[Luke]

Even Accuphase release their schematics - go to
Accuphase M-1000 Prospekt
perhaps one of the member have perform a "reverse engineering".

this is not a DIY amp, but thanks for the post🙂

 

[tiefbassuebertr]

this is not a DIY amp, but thanks for the post🙂

No, because it is a commercial device. But Accuphase is a good sample for a diy project; have a look also about
http://www.diyaudio.com/forums/solid-state/163489-accuphase-clone.html

 

[mr l]

bear in mind those accuphase units are quite old, and the diagrams are of dubious quality.
If someone owned a pair of krell mra's I doubt they would be toying with it, I know I wouldn't. you'd be better off trying to get literature for the FPB series, they came out around the same time.