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Musician questions

Former Community Member
Former Community Member

Hi there, 2 questions using my Seaward Apollo 500:

1- my radio connection between guitar and amplifier has a separate PSU, so is class 3? Should I simply PAT this as class 2?

2- my bass combo amp is a pretty new Ashdown Studio 15 which does not have any class marking (apart from RoHS CE) so has to be class 1? But this device fails earth continuity and I don't believe it is manufactured to earth the exposed metal parts. Can I ignore this test? If so, for what reason?

Thank you.

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    If a combo amplifier is used it is normal practice to earth the audio sockets' metal outer parts to prevent danger under fault conditions.  Screened audio leads connect from mains powered appliances like combo amplifiers to things like metal microphone stands or instruments. If the screen is earthed then it should prevent mains appearing on touchable metal parts due to a fault, shocking musicians. This has been confirmed by the O.P. in his recent tests. It is quite possible that the metal cover plate on the back of the bass amplifier is earthed as well, especially as it has mains rated things like a switch affixed to it.

     

    Edit. Add.

     

    DIY Tips - Electrical Safety for musicians on stage. (guitar-repairs.co.uk)

     

    Z.

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  • 0

    If a combo amplifier is used it is normal practice to earth the audio sockets' metal outer parts to prevent danger under fault conditions.  Screened audio leads connect from mains powered appliances like combo amplifiers to things like metal microphone stands or instruments. If the screen is earthed then it should prevent mains appearing on touchable metal parts due to a fault, shocking musicians. This has been confirmed by the O.P. in his recent tests. It is quite possible that the metal cover plate on the back of the bass amplifier is earthed as well, especially as it has mains rated things like a switch affixed to it.

     

    Edit. Add.

     

    DIY Tips - Electrical Safety for musicians on stage. (guitar-repairs.co.uk)

     

    Z.

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