Home » Audio » Silicon Valley » Distortion vs Output
Distortion vs Output [message #10412] Wed, 01 March 2006 12:43 Go to next message
GarMan is currently offline  GarMan
Messages: 960
Registered: May 2009
Illuminati (2nd Degree)
According to spec sheets of National's amp chips, THD declines as output power increase.

As an example, THD for LM3886, 8 ohm load, 1kHz:
0.03% at 10 mW
0.01% at 0.1 W
0.006% at 1 W
0.003% at 10 W

Does this mean that if I put an L-pad at the output of the amp to reduce signal to speaker by say 20dB, I can force the chip to operate at a higher wattage and therefore, lower distortion?

gar.


Re: Distortion vs Output [message #10413 is a reply to message #10412] Wed, 01 March 2006 16:48 Go to previous messageGo to next message
Manualblock is currently offline  Manualblock
Messages: 4973
Registered: May 2009
Illuminati (13th Degree)
Hey G-Man; are you following a build article or going it alone? Have you checked the Chip amp sites? I am sure you checked Rod Elliotts site but in case not he has a very good tutorial on these amps. Very down to earth and well written.

Re: Distortion vs Output [message #10414 is a reply to message #10412] Fri, 03 March 2006 17:16 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18782
Registered: January 2001
Illuminati (33rd Degree)

'Spose you could, but that seems counter-intuitive. You know, 0.03% distortion is very low. I think I could probably live with that, all other things being equal. But if you do try to increase power output and load it down with an L-Pad, let us know how it sounds.


Previous Topic: PS for GC
Next Topic: What has Randy Sloan been up to lately?
Goto Forum:
  


Current Time: Thu Oct 31 18:48:46 CDT 2024

Sponsoring Organizations

DIY Audio Projects
DIY Audio Projects
OddWatt Audio
OddWatt Audio
Pi Speakers
Pi Speakers
Prosound Shootout
Prosound Shootout
Miller Audio
Miller Audio
Tubes For Amps
TubesForAmps.com

Lone Star Audiofest