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Grounding Techniques /
Using the E62i/E31i/E30i
with a Patchbay
there, individual cables are connected to each piece of equipment. This setup also
requires that you lift the ground plug of all three-prong AC connectors, so there is the
possibility of danger if it is done incorrectly. We strongly recommend that you contract
with a qualified professional to carry out this or any kind of electrical work.
Another, less common problem you may encounter is that of oscillation (a ringing tone),
which, apart from being annoying, is potentially dangerous to your speakers. This is
generally caused either by poor outside wiring or by having an out of phase signal (most
commonly from an outboard signal processor). If audible oscillation occurs, you should be
able to eliminate the problem by reversing that signal's phase (many signal processors
have a switch that allows you to do this).
Using the E62i/E31i/E30i with a Patchbay
If you are using the E62i, E31i or E30i with an audio patchbay, you may find it
advantageous to connect its inputs and outputs directly to a pair of patch points. This
way, you can opt to route signal to the equalizer from any source. For example, in a
recording environment where you are using the E62i, E31i or E30i to "tune" the room, you
may typically want to have the control room outputs routed to the equalizer inputs and the
equalizer outputs routed to the power amplifier(s) driving the control room speakers.
For maximum convenience and flexibility, we recommend that you half-normal these
connections to the E62i / E31i / E30i patchpoints, so that the routing will automatically be
made unless a patch cable is inserted. If a different signal (such as a bus output or insert)
needs to be substituted, you can then override the half-normalled connection simply by
inserting a patch cable.
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