TC Electronic RH750 - Manual (Page 20)

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operatIon rear panel
RH750’s MUTE button mutes both the speaker and DI
outputs. This means that you can tune up with no
sound going to your own rig or to the PA.
RH750’s balanced output has been designed with the utmost
care for the sound. This is achieved through a galvanic isolated
transformer coupling. The active design by far outperforms most
standard DI boxes around, and it is capable of driving long cable
hauls. No phantom power is required.
Ventilation
Be sure not to cover the black cooling plate of the RH750
amplifier! Insufficient ventilation may cause the amplifier’s
temperature to increase.
If your RH750 is insufficiently ventilated, it may go into
Heat Protection mode, which is indicated by an “H” on the
front panel display. Please read more on the following
page.