4g61t.org

Specializing in the 3g CSM
It is currently Thu Mar 28, 2024 10:17 am

All times are UTC-05:00




Post new topic  Reply to topic  [ 6 posts ] 
Author Message
 Post subject: McIntosh amp probs.
PostPosted: Sun Sep 28, 2003 2:59 pm 
Offline
CSM Expert
User avatar

Joined: Mon Jul 22, 2002 8:58 pm
Posts: 1187
Location: KCMO
I have a McIntosh 4 channel amp. 50Wx4 Was given to me a long time ago. I opened it up and the main power trace on the board was melted. I resoldered it and now the amp works. Problem is that it works with only two inputs. I have two tens hooked up bridged to channels 1&2, 3&4. It puts out a rythmic thump thump thump over the music if i plug the signal inputs into channels 3&4. 1&2 sound fine. What could be causing this? Is it fixable? I looked this amp up on the web and seems to retail for over $1200. :o

_________________
http://members.cardomain.com/socrateez
04' Olds Alero
91' Colt GL hatchback
4g15 12valve 5spd.
4g37 TB, MAF & Injectors. 4g37 ECU
Ported & polished & custom CAI w/K&N filter
5* Cam retard, 7*Ignition advance
2-1/4" catback w/flowmaster muffler
89 GT brake and suspension swap
Lots of little s#@t


Top
   
 Post subject:
PostPosted: Sun Sep 28, 2003 4:52 pm 
Offline
Member
User avatar

Joined: Wed Jan 15, 2003 6:33 pm
Posts: 191
Location: England
$1200 for a 4x50watt? They're usually pretty much free here :)

Sounds like PSU dead, or if it's a shared PSU between the amps then the amps dead. Sounds like a typical amp fault, oscillating at a low frequency.

Chances are someone has shorted the output, blew an amp chip which fried a track as well.

If you want it fixed, give me a PM, I built my own last year.


Top
   
 Post subject:
PostPosted: Sun Oct 12, 2003 8:46 am 
Offline
CSM Expert
User avatar

Joined: Mon Jul 22, 2002 8:58 pm
Posts: 1187
Location: KCMO
Something else strange. I noticed that i have bass coming only from one channel. High freqs from the other three. Swapping inputs around changes nothing. This thing booms from one channel tho!

_________________
http://members.cardomain.com/socrateez
04' Olds Alero
91' Colt GL hatchback
4g15 12valve 5spd.
4g37 TB, MAF & Injectors. 4g37 ECU
Ported & polished & custom CAI w/K&N filter
5* Cam retard, 7*Ignition advance
2-1/4" catback w/flowmaster muffler
89 GT brake and suspension swap
Lots of little s#@t


Top
   
 Post subject:
PostPosted: Mon Nov 22, 2004 4:25 am 
Offline
CSM Junkie

Joined: Fri Oct 22, 2004 4:55 pm
Posts: 430
Location: Los Angeles, California
mc's were once one of if not the best amps around. old school ones are pretty much priceless


Top
   
 Post subject:
PostPosted: Mon Nov 22, 2004 4:56 am 
Offline
Member

Joined: Sun Oct 10, 2004 6:17 am
Posts: 72
Location: Calgary,Alberta
I'd bring it to a reputable electronics tech,and have it repaired.
Mac is the shiznit!!

_________________
New toy in the works....
World finals,here i come!!
http://www.termpro.com/asp/competitorst ... 1&Season=0
Team Canada at work
http://www.termpro.com/dbdrag/photos/E6 ... 81P25C.jpg


Top
   
 Post subject:
PostPosted: Thu Dec 23, 2004 11:02 am 
Offline
Newbie

Joined: Tue Dec 21, 2004 2:10 pm
Posts: 28
Location: Cold State Of MN
Sounds like your circuits are crossed in your amp. By switching the input tells you that your freq. is messed up in your amp. If you really like the amp I would take it in and get it repaired. It might be cheaper just to buy a new amp.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 6 posts ] 

All times are UTC-05:00


Who is online

Users browsing this forum: No registered users and 9 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Limited