mike 110 Posted March 17, 2014 Share Posted March 17, 2014 My mb150 has started to distort at under half volume , do I need to replace the speaker ? I'm not sure whether to get it checked out and possibly repaired , then add a cab or get rid and buy an amp head and cab …..? I'm jamming stuff with a few friends at the mo and the guitarist has a 120watt Blackstar amp . Any forthcoming advice will wholeheartedly welcome as I'm completely tech knowledge free Thanks in advance , Mike Quote Link to comment Share on other sites More sharing options...
dudewheresmybass Posted March 18, 2014 Share Posted March 18, 2014 It might be worth contacting marshall's service dept. they have been very helpful with me answering and solving tech issues I've had in the past. Quote Link to comment Share on other sites More sharing options...
davehux Posted March 18, 2014 Share Posted March 18, 2014 Is it the same on both channels? If so, probably the speaker. If it's only on the Classic (valve) channel, could just be a new valve needed. It's a standard ECC83 (12AX7) valve which will cost you £15 and takes a few minutes to fit Quote Link to comment Share on other sites More sharing options...
mike 110 Posted March 18, 2014 Author Share Posted March 18, 2014 [quote name='dudewheresmybass' timestamp='1395142620' post='2399056'] It might be worth contacting marshall's service dept. they have been very helpful with me answering and solving tech issues I've had in the past. [/quote] [quote name='davehux' timestamp='1395146720' post='2399127'] Is it the same on both channels? If so, probably the speaker. If it's only on the Classic (valve) channel, could just be a new valve needed. It's a standard ECC83 (12AX7) valve which will cost you £15 and takes a few minutes to fit [/quote] I never thought of giving Marshall a call , good idea . I don't use the Modern channel very often …I'd better try both channels thoroughly and make sure . Trying to make myself heard along the Blackstar may be a bit too much for a 150 ….? Thanks Quote Link to comment Share on other sites More sharing options...
mike 110 Posted April 25, 2014 Author Share Posted April 25, 2014 It sounds like the speaker is on its way out , it was really distorting last night at about a 1/4 volume . I'm getting rid anyway , but does anyone know how much roughly it would be to repair ? Or should I just sell it cheap with the relative info ? Quote Link to comment Share on other sites More sharing options...
Grangur Posted April 27, 2014 Share Posted April 27, 2014 I had this problem with an MB30. I solved it by opening up the front ang carefully using a vacuum cleaner round the cone moving parts. Ithink you'll find Marshall speakers are susceptible to dust clogging the cone movement. Quote Link to comment Share on other sites More sharing options...
mike 110 Posted April 28, 2014 Author Share Posted April 28, 2014 [quote name='Grangur' timestamp='1398581690' post='2435376'] I had this problem with an MB30. I solved it by opening up the front ang carefully using a vacuum cleaner round the cone moving parts. Ithink you'll find Marshall speakers are susceptible to dust clogging the cone movement. [/quote] Thanks mate , I'll give that a try Quote Link to comment Share on other sites More sharing options...
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