DNM Power Amp Circuit Diagrams Wanted

mozfet · 22nd September 2003, 12:22 PM

Does anyone have circuit diagrams for any of the DNM Power Amps?

Mozfet

DrG · 22nd September 2003, 08:20 PM

These were/are well-respected amps and received good reviews as I remember. I'd also like to see inside... anybody got the schematics??

hifidaddy · 23rd September 2003, 02:15 PM

I have a DNM preamp, early model in metal case. It seems to be a budget model, as many components are "missing" on the boards, mainly the complementary output stage. I did some reverse engineering, too and could do a hand drawing of the schematic.

Soundwise, it is definitely better than a Naim 82 with Hicap.

BTW, if someone would send me a DNM power amp, I could do reverse engineering for that, too.

kind regards,
Hartmut

lt cdr data · 29th August 2009, 09:10 PM

long time ago, but I had one, drew it out, it flummoxed me a bit, quite simple as I recall.

single diffreential pair with a current source tail, single transistor, can't recall bias.

loaded with current mirror.

can't recall VAS, quite simple, similar to naim one, perhaps a darlington,

and I thinnk into 2 mosfets, power, simple as that, total transistors I recall to be around 11.

22nd September 2003, 12:22 PM	#1
mozfet diyAudio Member Join Date: Mar 2002	DNM Power Amp Circuit Diagrams Wanted Does anyone have circuit diagrams for any of the DNM Power Amps? Mozfet

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22nd September 2003, 08:20 PM	#2
DrG diyAudio Member Join Date: Aug 2003 Location: South Africa	These were/are well-respected amps and received good reviews as I remember. I'd also like to see inside... anybody got the schematics??

23rd September 2003, 02:15 PM	#3
hifidaddy diyAudio Member Join Date: Oct 2001 Location: Munich, Germany	I have a DNM preamp, early model in metal case. It seems to be a budget model, as many components are "missing" on the boards, mainly the complementary output stage. I did some reverse engineering, too and could do a hand drawing of the schematic. Soundwise, it is definitely better than a Naim 82 with Hicap. BTW, if someone would send me a DNM power amp, I could do reverse engineering for that, too. kind regards, Hartmut

29th August 2009, 09:10 PM	#4
lt cdr data diyAudio Member Join Date: Dec 2003 Location: earth	long time ago, but I had one, drew it out, it flummoxed me a bit, quite simple as I recall. single diffreential pair with a current source tail, single transistor, can't recall bias. loaded with current mirror. can't recall VAS, quite simple, similar to naim one, perhaps a darlington, and I thinnk into 2 mosfets, power, simple as that, total transistors I recall to be around 11.