Digital amp revolution here - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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
Reply
 
Thread Tools Search this Thread
Old 30th September 2003, 01:08 AM   #11
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
The XR45 is rated at 100W/6R X2, I could not find an 8R or 4R rating.

Nor could I find an all channels driven rating.

The power was also spec'd at 0.9% THD, for $224 for the XR25 I might buy one to see what the noise is about.
  Reply With Quote
Old 30th September 2003, 01:30 AM   #12
diyAudio Member
 
Tube_Dude's Avatar
 
Join Date: Mar 2002
Location: Aveiro-Portugal
Hi

For the operating manuals with the specifications
of the SA-XR25 and 45...open

http://www.pasc.panasonic.com/nocookies.asp


and clic in operating manuals....

Cheers
__________________
Jorge
  Reply With Quote
Old 1st October 2003, 05:32 AM   #13
diyAudio Member
 
sllydderrr's Avatar
 
Join Date: Jan 2003
Location: De Winton, Alberta
Excerpt from the manual :

Click the image to open in full size.

SMPS supply, class D amp or not... that is SOME SWEET-*** efficiency!

Maybe Panasonic should go into home heating!
  Reply With Quote
Old 1st October 2003, 05:56 AM   #14
diyAudio Member
 
johnferrier's Avatar
 
Join Date: Sep 2003
Location: WA
Quote:
Originally posted by sllydderrr
Maybe Panasonic should go into home heating!
That's some good humor there. Thanks.


JF
  Reply With Quote
Old 1st October 2003, 12:17 PM   #15
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Quote:
Originally posted by janneman

A linear power supply only charges the caps at about 10% of the mains cycle. Smps's are always charging, so there is much less ripply, also because the freq is much, much higher.

Jan Didden
Do you mean to say that a linear regulated supply charges the caps 10% of the time with the error amp doing the heavy lifting.

When SMPS fail -- which they used to do quite frequently -- they fail spectacularly.

We must congratulate Panasonic on an amplifier which approaches the distortion levels found in tube amps of the early 1960's.

When manufacturers stop advertising continuous power, perhaps auto manufacturers wll stop advertising horsepower. It's the sizzle that sells the steak.
  Reply With Quote
Old 1st October 2003, 09:22 PM   #16
diyAudio Member
 
Tube_Dude's Avatar
 
Join Date: Mar 2002
Location: Aveiro-Portugal
Quote:
Originally posted by jackinnj


We must congratulate Panasonic on an amplifier which approaches the distortion levels found in tube amps of the early 1960's.
We must not forget that in the case of the Panasonic...this distortion is achieved with the open loop ..as the Panasonic do not use feedback...
__________________
Jorge
  Reply With Quote
Old 3rd January 2005, 11:14 AM   #17
vytas is offline vytas  Lithuania
diyAudio Member
 
Join Date: Oct 2003
Location: Vilnius
Default Hi everyone,

We should notice that 0.9% THD is given to 100W/6Ohm. For me it is very interesting to know hom what is THD value on 50w/6Ohm and what is SNR value?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
fellow enthusiasts, la revolution classd4sure Class D 37 11th September 2006 02:25 AM
Sound's Revolution Stee Solid State 0 25th June 2006 02:30 PM
Modding 7.1 Revolution. rosbacke Digital Source 9 17th June 2004 02:11 PM
Choke. the next revolution? wazzup Digital Source 1 19th January 2004 03:36 PM
I'am going for the Revolution 7.1 lykkedk Digital Source 0 21st March 2003 07:39 PM


New To Site? Need Help?

All times are GMT. The time now is 07:45 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2