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VT Calais 4th January 2004 10:04 AM

Has any one built this 1KW amp?
Does anyone have any experience with
THIS or any other 1KW amp?

Workhorse 4th January 2004 10:34 AM

SIR , I havent build ANY of HOLTONS AMP
BUT i have built amps upto 2.5KW
Waana intersted?

VT Calais 4th January 2004 12:44 PM

I am kinda thinking of building something that will drive four four ohm 10 inch subs @ 250w each.

dex8168 11th January 2004 02:04 PM

Sir Amp_man,

would you be kind enough to share to me some schematics of power amplifiers which delivers 500w/8ohms and/or higher output. Your 2.5K sounds good.


Workhorse 12th January 2004 05:31 AM

2 Attachment(s)
:smash: :smash: :smash: :smash:
Here is a Schematic for u

Workhorse 12th January 2004 05:35 AM

There are variety of output NPN transistors to choose:

Samuel Jayaraj 12th January 2004 07:11 AM


The CF diode is missing in the lower half of the amp. Is this O.K?

Everyone else,

Any comments on the schematic presented by Ampman? Will the driver stage provide sufficient base current to the output stage of will there be driver pulling?

And what, no short-circuit protection for an amp of this magnitude?

Workhorse 12th January 2004 08:43 AM

The CF diode is CURRENT FEED diode which does balancing of driver stage current .
As this is Quasi complementary stage the CF diode will remain as it is at upper rail.
The output stage is formed by TRIPLET CURRENT GAIN STAGE
which has a current gain of approximately 125000 times, therefore it doesnot pose a problem on driving low impedance speakers.:devilr: :bigeyes:

Samuel Jayaraj 12th January 2004 09:18 AM


Thanks for the reply. What about short circuit protection?

Workhorse 12th January 2004 10:27 AM

IF anyone wants to build this amp then i cant post a schematic of shortcircuit protection

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