Using Channel Inserts

In addition to using Auxiliary sends and returns to access outboard devices, the MPL 1502 also provides channel inserts for the first five (mono) input channels. These should be used when you want to affect just one channel’s signal, as opposed to signal from several channels— most often, this will be for dynamic processing purposes (such as outboard equalization, compression/limiting, or noise gating). You can also use the channel insert sends as post-eq (but pre-fade) direct outputs, if you need to route a single monophonic signal to an external device such as a tape deck.

CHANNEL INSERT - TIP RETURN - RING SEND

The channel insert jacks on the rear panel accept 1/4” TRS plugs, with the ring carrying the send signal and the tip carrying the return signal; this will normally be connected to a Y-cord (see the “Connecting The MPL 1502” section in this manual for a wiring diagram). This configuration is sometimes known as an “effects loop,” since the signal is sent and returned over the same cable.

If nothing is plugged into the channel insert jacks, they have no effect— but if you connect them to a passive device like a patchbay, you’ll need to normal (perma- nently connect) or half-normal(connection is made unless overriden by a patch cord) the send to the return. The insert signal is returned just before the channel fader. For this reason, you’ll have to be careful to set the output of external devices connected this way to unity gain.