Rear Panel Description
1. 1/4" CHANNEL INPUT. This is a tip-ring-sleeve (TRS) balanced input connector. Tip is (+), ring is (-), and sleeve is
ground. For unbalanced operation, use either a mono or stereo TRS plug. If using a stereo plug, short the ring to the sleeve.
2. 1/4" CHANNEL OUTPUT. This is a mono tip-sleeve (TS) unbalanced output connector. Tip is (+) and sleeve is ground.
Use either a mono or stereo cable. When using a stereo TRS plug, connect your hot lead to the tip, ground to the sleeve and
leave the ring open.
3. MIDI IN. This connector allows the MPE 47 to respond to external MIDI control.
4. MIDI OUT. This connector drives the input of another MIDI device.
5. MIDI THRU. This output contains all the MIDI information exactly as it comes into the MIDI input. None of the con-
trols on the MPE 47 have any effect on this output. Normally used for daisychaining purposes.
6. Remote Power Supply Input. USE ONLY A RANE MODEL RS 1 OR OTHER REMOTE AC POWER SUPPLY AP-
PROVED BY RANE. The MPE 47 is supplied with a remote power supply suitable for connection to this input jack. Consult
the factory for replacement or substitution.
7. GROUND LIFT Switch. This switch gives the user the option to tie signal ground to chassis ground. Typically, a system
is quieter in the LIFT position. See CHASSIS GROUNDING note on last page for details.
8. Chassis Ground Point. A 6-32 threaded hole used for chassis grounding purposes. See CHASSIS GROUNDING note
on last page for details.
O P E R A T I N G I N S T R U C T I O N S
THE BASICS. Don’t be intimidated by the fact that the
MPE 47 is a programmable equalizer with a lot of buttons
on the front and none of the familiar slide controls and
rotary pots and such. The product is very straightforward
and following the steps below should get you started.
ALWAYS THINK FOUR. The MPE 47 has four inde-
pendent channels. You can set up separate EQ curves for
each channel; however when it comes to memory opera-
tions all four channels are affected together. There are 128
possible memory locations TOTAL, not 128 locations for
each channel. Each Stored Memory location is split into 4
pieces — one for each channel. The MPE 47 stores four
channels at a time, You cannot store one channel without
the others. If you edit one channel and store it, you also
store the other 3 channels with it. They are not changed,
but they are stored with the new changed channel. When
you recall a Preset Curve, you recall four preset curves.
They may be different, but they are all recalled at once.
When you use Curve Weighting, you are using four curves
to weight four channels at one time. Just remember that
anything you do with memory, you do to all four channels
at a time.
EDITING CURVES. Changing the overall level or
equalizer curve of any of the channels requires the use of
the EQ Edit mode. To edit any curve push the EQ button
(repeated operation cycles between Ch.’s 1 & 2, Ch.’s 3 &
4, and neither) to select the channels you wish to modify.
Now press LEVEL or any of the 7 frequency buttons (the
yellow LED lights to acknowledge selection). Next scroll
the UP/DOWN buttons until the desired level shows on the
green EQUALIZER display. When finished editing all four
channels, push the STORE button once. The number in
the SYSTEM display starts blinking to remind you to
select a location, or to use the current one. Enter a new
number if needed, then push STORE again to place the
four new curves into the Stored Memory location shown.
The MPE Users Guide should be consulted for further
details.
STORING CURVES. Four curves (one for each channel)
are stored in any of the 128 memory locations at one time.
Once stored, this location is referred to as the Stored
Memory location. To begin the process, press STORE
once. This causes the SYSTEM display to begin blinking
the current Stored Memory location number. If you want
to store your Working Memory curves into this location,
press STORE again and your wish shall be granted. If not,
select another Stored Memory location using the number
keys or the UP/DOWN buttons. When the correct location
is displayed, press STORE again. The four curves in the
selected location have now been replaced with the four
curves of the current Working Memory.
COMPARING CURVES. A most useful feature is the
ability to compare the changes you have just made with
what is in the Stored Memory location. The MPE 47
makes this easy by using the MEMORY button when in the
EQ Edit mode. All changes to the Working Memory are
Summary of Contents for MPE 47
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