Final test: Module Leco vs Crown Powertech Series Amplifier

[DjLeco]

I decided to make an comparative test between mine AB class module amplifier vs. Crown Powertech Series Amplifier.

Dropping power supply to around +/- 77Vdc, to achieve around 500 Watts on mine module.
Both receiving same signal at inputs,both with 4 ohm dummy load on outputs , both calibrated for same tension on output at 1000Hz, means both are equal output power for 1000Hz, so input controller knob, adjust equally both amplifiers, any difference could very easy observablle, so any difference between them are shown.

To mentionate, Crown amplifier is with patented IOC Led (Input output Comparator) wich monitors any distortion , equally or greater than 0.05%, in entire amplifier bandthwidth

http://crownaudio.com/pdf/amps/iocpaper.pdf

WAITING FOR COMMENTS.

Calibrated probes:

Leco AB Module vs Crown Powertech Series Intro

YouTube - Leco AB Module vs Crown Powertech Series Intro.MOV

3,3Hz Sin

3,3Hz Tri

3,3Hz Sqr

30 Hz sinusoidal, max output
YouTube - Leco vs Crown Part 1.MOV

5Hz-30Hz sinusoidal, triangular, squarewave
YouTube - Leco vs Crown Part 2.MOV

30Hz-20Khz-8Hz, sinusoidal, triangular, squarewave
YouTube - Leco vs Crown Part 3.MOV

Dummy loadresistors
http://www.youtube.com/watch?v=M7vOAmCH3Pk

And here some tests with module equipped witg 5 paris of 2SA 2SA Toshiba's output devices , supplied at +/- 100Vdc

8Hz Sin

8Hz Sqr

30Hz Sin

30Hz Sqr

100Hz Sin

100Hz Sqr

1000Hz Sin

1000Hz Sqr

10000Hz Sin

10000Hz Sqr

20000Hz Sin

20000Hz Sqr

100000Hz Sin

Dummy load cooling down.
YouTube - Rezistenta la racire



If anyone could calculate Slew Rate of mine module, regarding pictures above at, supplied at +/- 100Vdc, will be very appreciate!

Also any comment will be appreciate too!

 

[HENDI]

plish share layout pcb

I decided to make an comparative test between mine AB class module amplifier vs. Crown Powertech Series Amplifier.

Dropping power supply to around +/- 77Vdc, to achieve around 500 Watts on mine module.
Both receiving same signal at inputs,both with 4 ohm dummy load on outputs , both calibrated for same tension on output at 1000Hz, means both are equal output power for 1000Hz, so input controller knob, adjust equally both amplifiers, any difference could very easy observablle, so any difference between them are shown.

To mentionate, Crown amplifier is with patented IOC Led (Input output Comparator) wich monitors any distortion , equally or greater than 0.05%, in entire amplifier bandthwidth

Crown Audio - Professional Sound Amplifier Systems Worldwide

WAITING FOR COMMENTS.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

Calibrated probes:

An externally hosted image should be here but it was not working when we last tested it.

Leco AB Module vs Crown Powertech Series Intro

YouTube - Leco AB Module vs Crown Powertech Series Intro.MOV

3,3Hz Sin

An externally hosted image should be here but it was not working when we last tested it.

3,3Hz Tri

An externally hosted image should be here but it was not working when we last tested it.

3,3Hz Sqr

An externally hosted image should be here but it was not working when we last tested it.

30 Hz sinusoidal, max output
YouTube - Leco vs Crown Part 1.MOV

5Hz-30Hz sinusoidal, triangular, squarewave
YouTube - Leco vs Crown Part 2.MOV

30Hz-20Khz-8Hz, sinusoidal, triangular, squarewave
YouTube - Leco vs Crown Part 3.MOV

Dummy loadresistors
Rezistentele.MOV - YouTube

And here some tests with module equipped witg 5 paris of 2SA 2SA Toshiba's output devices , supplied at +/- 100Vdc

8Hz Sin

An externally hosted image should be here but it was not working when we last tested it.

8Hz Sqr

An externally hosted image should be here but it was not working when we last tested it.

30Hz Sin

An externally hosted image should be here but it was not working when we last tested it.

30Hz Sqr

An externally hosted image should be here but it was not working when we last tested it.

100Hz Sin

An externally hosted image should be here but it was not working when we last tested it.

100Hz Sqr

An externally hosted image should be here but it was not working when we last tested it.

1000Hz Sin

An externally hosted image should be here but it was not working when we last tested it.

1000Hz Sqr

An externally hosted image should be here but it was not working when we last tested it.

10000Hz Sin

An externally hosted image should be here but it was not working when we last tested it.

10000Hz Sqr

An externally hosted image should be here but it was not working when we last tested it.

20000Hz Sin

An externally hosted image should be here but it was not working when we last tested it.

20000Hz Sqr

An externally hosted image should be here but it was not working when we last tested it.

100000Hz Sin

An externally hosted image should be here but it was not working when we last tested it.

Dummy load cooling down.
YouTube - Rezistenta la racire



If anyone could calculate Slew Rate of mine module, regarding pictures above at, supplied at +/- 100Vdc, will be very appreciate!

Also any comment will be appreciate too!

 

[black]

Leco amplifier 1000 w /4 ohms

 

[DjLeco]

W8 to see you results, on dummy load.

Also I want to see tests for 10Khz squarewave, and surely, damping factor for your clone!

Good luck, soon I will present, version 2 of Leco amplifier, with some surprises!