Balanced audio technology VK500/1000: "Single-Ended Bridge" Topology, 450W into 4 Ohm

tiefbassuebertr · 10:01 PM

About
http://www.balanced.com/resources/br.../VK500desc.pdf
I read:
A typical solid-state ampliﬁer
will have four or ﬁve gain stages, with a feedback loop traversing these same
stages to correct the signal. The VK-500 uses only two gain stages—without
global feedback. Unusually direct for any ampliﬁer, this purist signal path is even
more surprising in a design of such high power. The ingenuity of the signal
path is complemented by a unique single-ended bridge topology that allows the
use of superior N-channel MOSFETs in both driver and output stages. The
result is a clear, open sound that breathes life into music.
This sounds like a design from Mr. Nelson Pass.
Also the review about
Balanced Audio Technology VK-500 Reviews
and
Product Review
Perhaps a transition from a "ZEN"-topology to a "CSPP" (Circlotron)??
Who knows more about BAT's topology?

banat · 8th May 2011, 06:04 PM

Yes , it is always employed Balanced Bridge / PPP ( Circlotron ) topology inside of this ( Viktor`s ) BAT SS or Tube PP Amp .

Best Regards

tiefbassuebertr · 10th August 2011, 10:12 PM

are anywhere schematics for download?

mr l · 10th August 2011, 10:54 PM

like krell, they don't release schematics. good luck!

a.wayne · 12th August 2011, 12:24 AM

Had a Pr ... not a fan .....................

tiefbassuebertr · 12th August 2011, 06:34 PM

Quote:

Originally Posted by mr l

like krell, they don't release schematics. good luck!

I don't need a detailled schematic diagram, only a simlified schematic like that one from the Pass Aleph on page 5 about
http://peufeu.free.fr/audio/schemas/Pass_Aleph_3.pdf

Nelson Pass · 12th August 2011, 10:25 PM

The phrase "balanced single-ended", first used IIRC by Bel Canto, and an
oxymoron if there ever was one, is nevertheless pretty descriptive.

It is likely:

1) Circlotron, either Common-Drain or Common-Source.

2) Two conventional single-ended output stages operated in balanced mode,
either Common-Drain or Common-Source, biased by a CCS or variable
current source.

3) If the product is advertised as lacking global feedback, then it very likely
is a Common-Drain version of 1 or 2

(Fet pin references. Your pins may vary)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
nowe audio "mono3.5" Solid State Single Ended MOSFET Power Amp -New Heatsink Approach	tiefbassuebertr	Pass Labs	5	23rd December 2010 10:00 AM
glass audio 1995 "Single Ended Glory"	habsrock93	Tubes / Valves	3	22nd June 2008 02:10 AM
Single-ended-series amp with a "1 winding" transformer	tubee	Tubes / Valves	27	17th September 2007 07:15 PM
600 ohm resistor between "+" and "-" of balanced inputs.	skpb	Analog Line Level	3	20th October 2006 12:38 PM
Balanced Audio Technology VK 3i preamplifier	w waldecker	Tubes / Valves	1	20th February 2006 10:54 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

8th May 2011, 06:04 PM	#2
banat diyAudio Member Join Date: Dec 2009 Location: near Belgrade	Yes , it is always employed Balanced Bridge / PPP ( Circlotron ) topology inside of this ( Viktor`s ) BAT SS or Tube PP Amp . Best Regards

10th August 2011, 10:12 PM	#3
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	are anywhere schematics for download?

10th August 2011, 10:54 PM	#4
mr l diyAudio Member Join Date: Dec 2003 Location: qld	like krell, they don't release schematics. good luck!

12th August 2011, 12:24 AM	#5
a.wayne diyAudio Member Join Date: May 2008 Location: Front Row Center	Had a Pr ... not a fan .....................

12th August 2011, 10:25 PM	#7
Nelson Pass The one and only Join Date: Mar 2001	The phrase "balanced single-ended", first used IIRC by Bel Canto, and an oxymoron if there ever was one, is nevertheless pretty descriptive. It is likely: 1) Circlotron, either Common-Drain or Common-Source. 2) Two conventional single-ended output stages operated in balanced mode, either Common-Drain or Common-Source, biased by a CCS or variable current source. 3) If the product is advertised as lacking global feedback, then it very likely is a Common-Drain version of 1 or 2 (Fet pin references. Your pins may vary)

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)