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Class D Switching Power Amplifiers and Power D/A conversion

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Old 28th March 2006, 06:50 AM   #1
irss is offline irss  Lithuania
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Location: Vilnius
Default Your Class D (SI, Amp6, Charlize, etc.) System

For future reference, it would be great and extremely helpful if those having Class D would briefly describe their system:

-what are the components (Amp, Cd player, Loudspeakers);
-subjectively, what are advantages/disadvatages of the latter system.
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Old 28th March 2006, 08:50 AM   #2
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Join Date: Feb 2006
Location: Surrey
Reboxed Sonic Impact with replaced pot and capacitors (input + power)
Marantz CD63KI-S with muting transistors and output caps removed
Tannoy Revolution R1 speakers

Currently waiting on inductors.


Great sound - much better than the Marantz PM66KI-S that I was using. Clear, low bass extension from very small speakers.
Would like a little more 'air' but just being greedy!
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Old 28th March 2006, 11:43 AM   #3
KeithC is offline KeithC  United Kingdom
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Join Date: Sep 2005
All systems frontended by computer.

Main system:

PC-1 -> Terratec Aureon Universe Toslink -> Benchmark DAC1
PC-2 -> Terratec DMX 6Fire spdif -> DAC1

DAC1 -> (balanced) -> UcD180 -> Lowther EX3. Bootiful.

System #2:

PC -> Russ Andrews modified Pro Hi-Fi Link -> Charlize -> Wharfdale flat panels. Bass heavy.

System #3

PC -> Creative X-Fi -> Dr Amp -> Wharfdale Glendales. Gaming crap.

System #4

PC -> Amp 6 (when I get round to assembling it).
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Old 28th March 2006, 01:18 PM   #4
GJF is offline GJF  United Kingdom
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Join Date: Nov 2005
Sony CDP-X222es with Silmics exchanged for standard caps, Sharp MD with modded power supply and audio, Sansui TU33S, Project Debut with Ortofon MC1 Turbo thru' modified QED phonostage into Amp 3 and Musical Technology Kestrels. (82 db spl @ 1 mtr and surprisingly loud levels with no clipping in a 5 X 4 mtr room.

Deep, smooth sound with loads of low level detail and precise imaging.
Much, much, better than a modified Arcam Alpha 7 and even a famed Lentek integrated.

Really chuffed actually because it just shouldn't work in theory!

Now if I can only get my CDP-227esd going again I'll be in heaven.
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Old 28th March 2006, 03:28 PM   #5
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Join Date: Dec 2004
Location: Quebec
cd player : luxman D105u (tube output stage), muting modified (mute transistor deleted in favor of a micro relay), i/v converter modified (op amp deleted).

amp: (under construction) IR audamp adaptation, 2ch with ±200wrms, other curent amp is a sony es or a Pass labs repro class A (that pumps out a mere 10w with 0,00001%eff compared to the 90%+ of the IR ... ).

speakers: Quest towers,speakers changed, cross over modified

To say the least, my latest "shock" listening was a MBL kit at CES (MBL101E + MBL 9011)...

the sound of my system come second...

Pat
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Old 28th March 2006, 05:19 PM   #6
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Default MLB kit?

Pat,
I have never heard of "MLB" can you post a link for us?
Roger
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Old 28th March 2006, 05:22 PM   #7
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excuse me, i meant MBL

http://www.mbl-germany.de

Pat
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Old 28th March 2006, 05:49 PM   #8
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Default Yes MBL, sorry

Pat,
They sure don't have much to say about what they are doing inside their amps, do they? Note; they do say they are very expensive. The part about getting the entire note right from beginning to end sure sounds like class D to me. If it isn’t, a class D could do the same for far less money.
Roger
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Old 28th March 2006, 05:56 PM   #9
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hummm, i cant argue about MBL stuff other than it was /$?%"/$%/$ awesome, never heard anything like it.
Yes they are expensive, figure something like 100k just for the speakers...it seems like there is a market for this kind of expensive stuff.
Did you read most what they sayd??

No its not class D. If my memory is ok, there was tube all over.

Pat
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Old 28th March 2006, 07:39 PM   #10
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Join Date: Jun 2005
Location: countryside
My computerbased system-
Creative X-Fi
Benchmark DAC1
4 Fenice 20a, two of them modified, BlackGates in the
power-rail, DynamiCaps-3mF-at the input, Jantzen film-
foil inductors (0.025mH), Bybee slipstream´s at the input.
The two other Fenice 20a unmodified for the surround-channels, the system is able to play 2+2+2 DVD-A
sources from Dabringhaus, Chesky etc.
Linaeum A1 with SEAS-chassis + Bybee slipstream,
DIY-subwoofer.
I´m very happy listen to Jazz and small classical music
with this configuration.

Cheers, Karl
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