
Manual-5
햽 TAPE OUTPUT jacks: One pair of RCA jacks provides pre-EQ, pre-LOOP Program Outputs. The other pair supplies pre-
EQ, post-LOOP Program Outputs. The microphone signals are not available at these Outputs, however they are selectable
using an internal jumper block. (See Service Information on page Manual-9.)
햾 SWITCHABLE LOOP SEND jacks: Use these ¼" unbalanced Left and Right Outputs for driving the inputs of a proces-
sor activated by the front panel LOOP button.
햿 SWITCHABLE LOOP RETURN jacks: Use these ¼" unbalanced Inputs for receiving the outputs of the above device.
헀 MAIN EFFECTS LOOP SEND jacks: Provide drive to the inputs of a signal processor which is not to be switched from
the front of the mixer. Connecting only to the LEFT EFFECTS SEND provides a mono Output; connecting to both LEFT
and RIGHT provides a stereo feed. These are ¼" TS (Tip-Sleeve) unbalanced connections.
헁 MAIN EFFECTS LOOP RETURN jacks: Receiving the processed signal generated from the MAIN EFFECTS LOOP
SENDs. These are ¼" TS unbalanced connections.
헂 Balanced MAIN MIC Input jack: Connects a balanced microphone of any impedance, either dynamic or condenser.
헃 Unbalanced high-impedance AUX MIC Input jack: Connects an unbalanced wireless or other high-impedance mic.
헄 MIC LOOP jack: Inserts external signal processing in the microphone circuit only. This is a ¼" TRS tip-send, ring-return
configuration. This feature does not affect the operation of the Main Program Channels.
헅 PHANTOM POWER switch: Engaging this pushbutton applies +15 V Phantom Power to the balanced (XLR) MAIN MIC
Input only. It has no effect on the Auxiliary Microphone Input. The adjacent red LED illuminates whenever Phantom
Power is active.
헆 BOOTH DUCKER switch: When in the ACTIVE position, the ENGAGE MIC switch on the front panel reduces the
Microphone level at the Booth Outputs. When in the DEFEAT position, Microphone level is not reduced.
AUX/PHONO input jacks: Use these stereo Phono Input pairs for connecting any moving-magnet type cartridges to the
mixer. Internal jumpers are provided to convert these into Line level Inputs (See Service Information on page Manual-9).
AUX/PH 1 and AUX/PH 2 jumpers are set at the factory for PHONO. The PH/AUX 3 jumper is set at the factory for a
LINE level input. When these jumpers are set to PHONO, never use these Inputs for any other purpose due to the amount
of gain and RIAA equalization present. Any unused Phono Input should have the Phono Shorting Plug installed to prevent
interference from an outside source. Do not put any of the Phono Shorting Plugs into the Tape Out jacks, as this will short
all the Outputs.
PHONO/AUX 3 input jacks: As in above. Note this Input is shipped with the internal jumpers in the LINE position.
LINE 1 & 3 through 6 Input jacks: Are suitable for all line-level devices such as the audio outputs of VCRs, compact
disc players, tape recorders, etc. These RCA connectors pairs are unbalanced, line-level Inputs only.
LINE 2 Input jacks: Are a fully balanced, ¼" TRS (Tip-Ring-Sleeve) line Input. The tip of the jack is (+), the ring is (–)
and the sleeve is ground.
GROUNDING POST terminal: Provided to facilitate your hum chasing, buzz eliminating experiments. Its purpose is to
provide a place to connect those otherwise unusable extra wires coming out of the turntables.
Chassis ground point: Since the MP 24z does not get chassis ground through the AC cord, this point is provided in case
your system does not have another earth ground such as the rack rails. A 6-32 screw and toothed washer is provided for
chassis ground. See Chassis Grounding on page Manual-8 for details.
GROUND LIFT SWITCH. Separates chassis ground from signal ground. Normally, this switch should be in the LIFT
position. In some circumstances, moving it to the opposite position eliminates stubborn hum and buzz problems. If you are
tempted to move this switch with your power amplifiers turned on and cranked up, don’t. Always turn your system levels
down before changing your grounds around and then bring them up slowly.
POWER input connector: No, this is not where Commissioner Gordon plugs in his Bat-phone, in fact it is not a telephone
jack at all. The MP 24z uses an 18 volt AC center-tapped transformer only. Use only a model RS 1, or other remote AC
power supply approved by Rane.
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