Phasing Problem

TjongKristian · 3rd December 2009, 04:43 AM

I just finished a couple of LM1875 Amp with PCB from BrianGT. Everything was good except one little problem. It seems that the sound phase is reversed. I tested the amp using the XLO reference disc. During the the in-phase test, the sound was scattered all over and during the outer-phase, the sound was focused in the centre. It supposed to be focused during the in-phase test and scattered during the outer-phase test. What could have caused this? Main's power not connected in the correct phase? Thanks.

Regards,

Kristian

ratza · 3rd December 2009, 05:48 AM

Are you sure that you have both speakers wired OK?

TjongKristian · 3rd December 2009, 07:41 AM

Yes. I am totally confused now. This is the first time I encountered this problem.

tomat · 4th December 2009, 02:17 PM

do you mean out of phase for both channel Kristian?,or there is only one?

3rd December 2009, 04:43 AM	#1
TjongKristian diyAudio Member Join Date: Aug 2002 Location: Jakarta, INDONESIA	Phasing Problem I just finished a couple of LM1875 Amp with PCB from BrianGT. Everything was good except one little problem. It seems that the sound phase is reversed. I tested the amp using the XLO reference disc. During the the in-phase test, the sound was scattered all over and during the outer-phase, the sound was focused in the centre. It supposed to be focused during the in-phase test and scattered during the outer-phase test. What could have caused this? Main's power not connected in the correct phase? Thanks. Regards, Kristian

3rd December 2009, 05:48 AM	#2
ratza diyAudio Member Join Date: Dec 2007 Location: Sibiu, Romania	Are you sure that you have both speakers wired OK? __________________ Any solution is a compromise.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
tube phasing for more power?	yourownfree	Tubes / Valves	16	10th May 2010 11:02 PM
Orientation and phasing of transformers?	Skorpio	Solid State	0	29th July 2008 01:35 PM
feedback phasing	audiofan	Tubes / Valves	1	8th December 2005 06:56 PM
phasing problems on front components	bser	Car Audio	1	14th December 2004 04:32 PM
Phasing Tweeters	ZiprHead	Multi-Way	1	15th December 2001 01:23 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	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

3rd December 2009, 07:41 AM	#3
TjongKristian diyAudio Member Join Date: Aug 2002 Location: Jakarta, INDONESIA	Yes. I am totally confused now. This is the first time I encountered this problem.

4th December 2009, 02:17 PM	#4
tomat diyAudio Member Join Date: Dec 2007 Location: east java	do you mean out of phase for both channel Kristian?,or there is only one?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)