Marshall mb150 distorting ...

[mike 110]

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

[dudewheresmybass]

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.

[davehux]

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

[mike 110]

[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

[mike 110]

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 ?

[Grangur]

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.

[mike 110]

[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