Question about Clavia Nord Stage 88 - Digital Stage Piano NS88

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Clavia Nord Stage EX88 dir. in active monitor damage the speakers (tweeter) ? Happened twice with active monitors: Peavey Impulse P1020 and Behringer B-300 Peter ;-)

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It is VERY easy to send to high a level to speakers.

A few important things:

ALL interconnected equipment MUST be powered from a single point. This avoids ground loops that can set up feedback. Powering monitorss at one end of a room from a receptacle and the synth at the other end of the room is inviting trouble.

REMEMBER that audio sent to the speakers that is causing the damage MAY be well above one's hearing range!

Use BALANCED audio lines where possible. CHECK that in's and out's are compatible, for instance both BALANCED TRS.

Use PROPER cables for interconnecting. Using plain stereo TRS cables for interconnecting TRS balanced lines is a NO-NO... they are cheaper but invite trouble.

If in close proximity to radio transmitters, interference can be a problem due to rectification of the radio signals that can create frequencies beyond the hearing range that can damage speakers.

The starting point is a post mortem on a failed speaker to look for damage.

The Behringer definitely requires a TRS or XLR input. I searched for a user manual online for the Nord but was unable to find one to verify they have a balanced output to run to the monitors.

There is a possibility that a filter in the NORD is NOT working, allowing digitizing noise to be presented on the output audio causing overloading of the tweeter speakers. The best way to check that is with an oscilloscope if you have access to one.

I would turn down the high eq on any active speaker to reduce the signal to the tweeter as an interim step.

Posted on Apr 30, 2010

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