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]

Originally Posted by 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

Crown Audio - Professional Sound Amplifier Systems Worldwide

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
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


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!