Mordaunt Short Avant 309i subwoofer set-up

this link appears to be offering a download of the avant 309i manual which should have part numbers. http://uploadreno.weebly.com/blog/mordaunt-short-avant-309i-manual

There is a pair available on Ebay right now. Here is a link to the auction- New Pair MORDAUNT SHORT 1 25mm Aluminum Dome Tweeters MSA1T 3R5

1. Are the stereo speaker wires run to the subwoofer and out to the stereo speakers
2. Make sure the notch filter is off
3. Refer to the manual on line: http://www.manualslib.com/manual/105794/Mordaunt-Short-Ms909w.html?page=7#manual
   
4. READ THE MANUAL
   

Hi - Just reading your problem with the 906's and removing the front cover to replace the tweeter. Did you ever solve the issue? because I tried today and I can't budge the silver cover once the screws have been removed. My email address is [email protected] if you can help - thanks

Hello. I appreciate this is an old post but in case someone still has one of these.I just got one in for repair today. Get two rca connectors and short them out so the input is grounded. If this fixes the problem then it is coming in through the inputs. If not then the two large filter caps need replacing. Another problem these units have is the glue that holds the small filter caps etc corrodes the board after a few years. Clean it off, repair the tracks and coat the board with pcb lacquer.

hi ,
2 things to do

1 - the power amp has fail and will need to be looked at
2- your amp could have a sub output faillure

Hiya, its the cone. The former is touching the magnet inside. Realignment is really tricky and dont know many people who can do that so you may either have to live with it or see if someone can recone it in your area.

Best of luck

I had similar problems my tweeter was blowen and it had to be replaced... I actually blew the speaker many times using a NAD amp as there were spikes coming from the amp. I changed the amp to a Marantz PM7200 and have had no problems since.