Mackie MR8mk3 业主指南

 

 

Question: The speaker hums when I connect something to its input… 

Answer: The presence of a 60Hz hum in the speaker only when a 

connection is made to another piece of equipment suggests the 

presence of a ground loop. Such a loop is caused by electrical 

interaction of the signal grounds on two pieces of equipment, and is 

not necessarily an indication of broken gear. If a balanced connection 

to the speaker is being used, the simplest way to correct this problem is 

to lift the signal ground on the end of the connecting cable closest to 

the signal source. NOTE: This is not to be confused with disconnecting 

the safety ground on the power plug - this should be avoided at all 

costs, as it can present a safety hazard. If an unbalanced connection is 

being made to the speaker, a line coupler such as the Ebtech Hum 

Eliminator can be used to eliminate the ground loop. 

Question: Can I connect this to the speaker output of an amplifier? 

Answer: When setting up your MR speaker, it is very important that you 

DO NOT connect it to the output of an amplifier. The inputs of the 

Thump series are made for non-powered outputs such as the main or 

aux outputs from a mixer. The outputs of an amp will easily damage 

and potentially cause a fire in just about any powered speaker such as 

the MR series.