Rane RE 27 Manuale di servizio
RE 27 AND RE 14
OPERATING
AND
SERVICE MANUAL
CORPORATION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
To reduce the risk of electrical shock, do not open the unit. No user
serviceable parts inside. Refer servicing to qualied service personnel.
e symbols shown below are internationally accepted symbols that warn
of potential hazards with electrical products.
is symbol indicates that a dangerous voltage
constituting a risk of electric shock is present within
this unit.
is symbol indicates that there are important
operating and maintenance instructions in the
literature accompanying this unit.
WARNING
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, registers, stoves, or other apparatus (including ampliers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A ground-
ing-type plug has two blades and a third grounding prong. e wide blade or third prong is provided for your safety. If the provided plug does not
t into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord and plug from being walked on or pinched particularly at plugs, convenience receptacles, and the point where it exits from
the apparatus.
11. Only use attachments and accessories specied by Rane.
12. Use only with the cart, stand, tripod, bracket, or table specied by the manufacturer, or sold with the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualied service personnel. Servicing is required when the apparatus has been damaged in any way, such as power supply
cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does
not operate normally, or has been dropped.
15. e plug on the power cord is the AC mains disconnect device and must remain readily operable. To completely disconnect this apparatus from
the AC mains, disconnect the power supply cord plug from the AC receptacle.
16. is apparatus shall be connected to a mains socket outlet with a protective earthing connection.
17. When permanently connected, an all-pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in the electri-
cal installation of the building.
18. If rackmounting, provide adequate ventilation. Equipment may be located above or below this apparatus, but some equipment (like large power
ampliers) may cause an unacceptable amount of hum or may generate too much heat and degrade the performance of this apparatus.
19. is apparatus may be installed in an industry standard equipment rack. Use screws through all mounting holes to provide the best support.
WARNING: To reduce the risk of re or electric shock, do not expose this apparatus to rain or moisture. Apparatus shall not be exposed to dripping
or splashing and no objects lled with liquids, such as vases, shall be placed on the apparatus.
NOTE: is equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. ese
limits are designed to provide reasonable protection against harmful interference in a residential installation. is equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communica-
tions. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment o and on, the user is encouraged to try to correct the interference
by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit dierent from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
CAUTION: Changes or modications not expressly approved by Rane Corporation could void the user's authority to operate the equipment.
is Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
1. WARRANTY EXPLANATION — PLEASE READ CAREFULLY
Rane offers a limited warranty, described in full on the Limited Warranty card included in the
packing materials, which covers both parts and labor necessary to repair any defects in the
manufacturing of your Rane product.
The warranty period is two (2) years, starting from either(i) the date of retail purchase, as noted
on either the sales slip from an authorized Rane dealer or on the warranty registration card sent,
in to the factory or, (ii) in the event no proof of purchase date is available, from the date of
manufacture, which is coded on the rear of the chassis.
If you send in the registration card according to the instructions on the card, or retain your sales
slip as proof of purchase, you will receive a full two (2) year warranty period from the date of
purchase, regardless of the date of manufacture. If you do not send in the registration card (“I
forgot.”), or you do not have a sales s1ip from an authorized Rane dealer (“My dog ate it.”), the
warranty period will only extend two (2) years from the date of manufacture.
All registered warranties are tracked by serial number, not by owner. Once your Rane product
is registered, it will be covered the full two years, regardless of any change in ownership.
Should you encounter any problems with your Rane product, be sure to contact either your
local Rane dealer or the Rane factory before taking it anywhere for repairs. We will help you to
identify and locate any specific malfunctions, possibly avoid needless shipment, or instruct
you as to the speediest method for authorized repair.
If you must send your Rane product to the factory or a warranty station for repair, BE SURE TO
INCLUDE THE FOLLOWING INFORMATION:
1. YOUR COMPLETE NAME AND RETURN SHIPPING ADDRESS (P.O.
box numbers are NOT acceptable)
2. THE SERIAL NUMBER OF THE RANE PRODUCT IN FOR REPAIR
3. A COMPLETE DESCRIPTION OF ANY AND ALL PROBLEMS YOU
ARE EXPERIENCING WITH THE PRODUCT.
Never ship the unit in any shipping carton other than the original or a replacement supplied by
Rane. Ship only by a reputable carrier. Be sure to insure the package for the full replacement
value. Rane cannot be held responsible for any damage incurred during shipping.
NOTICE REGARDING DAMAGES
THE RANE LIMITED WARRANTY COVERS ONLY THE COSTS IN LABOR AND MATERIALS TO
REPAIR DEFECTS IN MATERIAL OR WORKMANSHIP OR, AT RANE’S OPTION, TO REPLACE
DEFECTIVE PRODUCTS. CONSEQUENTIAL AND INCIDENTAL DAMAGES SUCH AS ECO-
NOMIC LOSS OR INJURY TO PERSON OR PROPERTY, WHATEVER THE CAUSE, ARE
EXCLUDED FROM COVERAGE. PLEASE REFER TO THE LIMITED WARRANTY CARD FOR A
FULL DESCRIPTION OF THE LIMITS ON THE COVERAGE OF THE LIMITED WARRANTY.
If you need further assistance concerning the repair, installation or operation of your Rane
product, please feel free to contact Rane galactic headquarters at:
Rane Corporation
10802 47th Avenue West
Mukilteo, WA 98275-5098
Phone: (425) 355-6000
FAX: (425) 347-7757
2
II. PANEL DESCRIPTIONS
RE 27 FRONT PANEL
RE 14 FRONT PANEL
1. EQ LEVEL CONTROL: This controls volume through the equalizer section and provides up to 6 dB
overall gain. Turn this control down if the overload LED lights up.
2. BYPASS SWITCH: Push this button IN to bypass the equalizer and level control; the bypass LED will
light whenever the bypass switch is engaged.
3. PINKNOISE SWITCH: Press this button IN toactivate the built-in pink noise generator. IMPORTANT:
SWITCH THE PINK NOISE GENERATOR OFF WHEN NOT IN USE, TO PREVENT POSSIBLE NOISE
BLEEDTHROUGH INTO PROGRAM MATERIAL
4. POWER SWITCH: You’ve probably figured this one out by now...
5. SIGNAL PRESENT INDICATOR: This green LED lights with any input above -20 dBm (.076 volts), even
in the bypass mode.
6. OVERLOAD INDICATOR: This red LED lights whenever the signal level through the equalizer section
reaches 4 dB below clipping
7. ANALYZER DISPLAY LEDs: Each red LED lights up when response is too high in that band; green LEDs
light when response is within ±3 dB or ±1 dB of the selected curve; yellow LEDs come on when response
is too low.
8. EQUALIZER SLIDERS: Calibrated in 3 dB increments, these sliders provide 12 dB of boost and 15 dB of
cut at each of the ISO frequency centers.
9. CURVE SELECT SWITCH: The NORMAL position will yield a flat response when all LEDs are green.
The HOUSE CURVE changes the response of the display such that the EQ sliders between 400 Hz and
1.6 kHz must be attenuated 3 dB to obtain green LED response. This reduction in midrange results in a
warmer more desirable sound at lower sound pressure levels.
10. WINDOW SELECT SWITCH: In the ±3 dB position, the green LED in each band will be lit when
signals of that frequency are within 3 dB above or below the Normal or House curve, whichever is
selected. In the ±1 dB mode, system response must be within 1 dB above or below the selected curve to
light the green LEDs.
3
11. MICROPHONE INPUT JACK: PLUG ONLY THE RANE MICROPHONE INTO THIS JACK--THE DC
POWER SUPPLY VOLTAGE SUPPLIED BY THIS JACK COULD BE DAMAGING TO ANY OTHER
MICROPHONE When the mic is plugged in, the display responds to whatever the mic picks up; when
the mic is unplugged, the jack automatically switches the display to monitor the output of the equalizer
section (see Section IV-9).
12. RTA LEVEL CONTROL: Use this knob to adjust the microphone level (or line level when the
microphone is unplugged) to properly drive the display. This control is accurately calibrated in dB-SPL;
any display band whose LED is green has the sound pressure level indicated by this knob (only with the
mic plugged in).
RE 27 REAR PANEL
RE 14 REAR PANEL
6. GROUND LIFT SWITCH: This switch provides the ability to separate chassis ground and signal
ground. Normally, this switch should be in the LIFT position. If you are tempted to try movingthis switch
with your power amplifiers turned on or turned up, DON’T BE. ALWAYS TURN YOUR AMPLlFIER LEVELS
DOWN BEFORE CHANCING YOUR GROUNDS AROUND and then bring them up slowly.
1. PINK NOISE LEVEL ADJUST: Use a 1/8" inch screwdriver to adjust the output from the Pink Noise
generator from 0 to 1.2 volts (-4 dBm) to match the input level requirements of the mixer or other
equipment driven by the generator.
2. PINK NOISE OUTPUT JACK: This is an unbalanced 1/4" jack which supplies Pink Noise to selected
equipment
3. EQ INPUT JACK: This is an automatic balanced/unbalanced 1/4" input to the equalizer section. Use a
mono 1/4" plug for unbalanced operation, or a stereo 1/4" plug wired as shown in the diagram below for
balanced operation.
4. EQ OUTPUT JACK: This is the automatic unbalanced/floating output from the equalizer section. Use
a mono%” plug for unbalanced operation, or a stereo 1/4" plug wired as shown in the diagram below for
use with balanced equipment (Refer to Rane Note 102 for further information on Rane’s floating output
system.)
5. AC LINE CORD: Plug this into a 120 VAC power outlet with grounding pin.
4
3-PIN BALANCED RANE 1/4" IN (BAL)
See Rane Note 110 for other configurations.
III. INSTALLATION
This section contains several diagrams which plainly show many, but by no means all, of the ways to
connect the RE 27 or RE 14 into a sound reinforcement or monitor system. Whatever your particular
application, it is helpful to realize that the RE 27 or RE 14 is actuallytwo independent products in one: an
equalizer with input(s) and output(s), and a realtime analyzer with mic input and pink noise output
Another thing to keep in mind is that the analyzer display will automatically monitor the output of the
equalizer section whenever the microphone is unplugged from the front panel jack This feature is very
useful in monitoring program material for feedback problems, resonances and the like.
Diagram III-1 : Main Speaker Equalization
Diagram III-2: Powered Mixer System Equalization
Diagram III-3: Stage Monitor Equalization Using Rane Microphone
Diagram III-4: Equalizing Specific Microphone/Speaker Combinations
5
DIAGRAM III-1: MAIN SPEAKER EQUALIZATION
IMPORTANT NOTES:
HEAVY LINES INDICATE DIRECT CONNECTIONS TO RE 27 AND RE 14. Thinner lines show other
connections in the system for clarity.
1. The RE 27 and RE 14 inputs are automatic balanced/unbalanced. If the output of the mixer is
unbalanced, use a shielded mono 1/4" patch cord to the EQ input(s). If the mixer is balanced, use a
connecting cord with a stereo 1/4" plug on one end for the EQ input(s) and a three-pin or 1/4" jack for the
mixer as required.
2. To drive both left and right amplifier channels from a single RE 27 output, use a “Y” connector to split
the RE 27 output to both left and right inputs of the amp or crossover. (NOTE: If you have the good
fortune to be using a Rane crossover AC 22 or AC 23, you need only connect the single RE 27 output to
the Channel 2 input of the crossover—both left and right outputs will automatically be driven internallyto
eliminate the need for a “Y” connector.)
3. If the RE 27 or RE 14 is more than 10 feet from the amp rack be sure that the input of the electronic
crossover or amplifier is BALANCED. If not, obtain a direct box or balancing line transformer to be
installed at the input of the amp rack. Connect the RE 27 or RE 14 output (s) to the amp rack using a stereo
1/4" plug wired as shown in Diagram I I-1. Long runs of unbalanced lines will usually result in excessive hum
or buzz.
6
DIAGRAM 111-2: POWERED MIXER SYSTEM EQUALIZATION
HEAVY LINES INDICATE DIRECT CONNECTlONS TO THE RE 27 AND RE 14. Thinner lines show other
connections for clarity.
IMPORTANT NOTES:
1. Most powered mixers utilize unbalanced outputs, so use shielded 1/4" mono patch cords (or uncoiled
type guitar cords) for all connections to RE 27 or RE 14.
2. Most powered mixers that contain built-in graphic equalizers provide separate inputs and outputs for
thisequalizer. BE SURE TO INSTALL THE BUILT-IN EQUALIZER AS SHOWN TO BYPASS THE BUILT-IN
EQUALIZER, OTHERWISE THINGS COULD GET RATHER MESSY DUE TO INTERACTION BETWEEN
EQUALIZERS. If the built-in equalizer is NOT bypassable, set all mixer-EQ sliders to the center (0 dB)
position and use only the RE 27 or RE 14 sliders for adjustment
3. You can patch a bypassable built-in equalizer into your monitor system by connecting it between the
Monitor Out and the monitor amp input as shown.
7
DIAGRAM III-3: STAGE MONITOR EQUALIZATION USING RANE
MICROPHONE
4. If you are running more than one monitor from a single equalizer, test each monitor location by
running up pink noise until feedback occurs. The monitor which feeds back soonest should be used for
the overall EQ adjustments using pink noise.
3. Place the Rane microphone at eye level of the performer and about six inches OFF TO ONE SIDE OF
THE STAGE MICROPHONE, in line of sight to the monitor speaker. If the stage microphone is directly
between the Rane mic and monitor speaker (blocking line of sight), some high frequencies will be
blocked giving a false reading on the analyzer display.
2. The run between the RE 27 or RE 14 and the monitor amp should be balanced whenever possible.
1. This set-up using the Rane microphone provides the most expedient method to optimize stage
monitor sound quality and also reduce feedback problems. Feedback induced by specific stage
midmonitor speaker coupling can also be attenuated by leaving the stage mic turned up and running up
the pink noise level through the monitor speaker until feedback occurs. Attenuate each feedback
frequency, as indicated by the analyzer display, until the mic/monitor combination feeds back at two or
more frequencies simultaneously. Usually the final EQ setting will be a compromise between a good
monitor sound and a not-so good monitor sound that gets louder before feedback If maximum SPL
before feedback is most important, use the set-up shown in Diagram III-4.
IMPORTANT NOTES:
HEAVY LINES INDICATE DIRECT CONNECTIONS TO THE RE 27 and RE 14. Thinner lines show other
connections for clarity.
8
DIAGRAM III-4: EQUALIZING SPEClFIC MICROPHONE/SPEAKER
COMBINATIONS
*NOTE: Be sure to use CHANNEL 2 when using the RE 14 in this test configuration.
4. The above configuration can be used for main speaker equalization to optimize system response for a
specific microphone used throughout the system, such as for choir, orchestral or big band situations
where all program material is picked up through microphones of the same make and model Patch the RE
27 or RE 14 (using channel 2 of the RE 14) into a SEND/RECEIVE loop as shown by the dashed lines, but
make the final output connection for the equalizer to the MAIN amp(s) and speakers instead of the
monitor system as shown.
3. Mixers that do not have separate SEND/RECEIVE capability for each channel will have to be wired as
shown in Diagram I I l-3.
2. Dashed lines show temporary connections for pink noise test purposes only; repeat this configuration
for each microphone input channel. When testing is completed, connect the RE 27 or RE 14 as indicated
by solid lines.
1. Using this test configuration allows the analyzerto look at the specific relationship between each stage
microphone/speaker combination. Since both the microphone and stage monitor speaker will exhibit
their own individual feedback tendencies, the inter-action between the two can cause pronounced
feedback problems. The above configuration will allow you to flatten or “normalize” this interaction
without actually getting to feedback levels (which is desirable in many situations). It should be noted that
this testing procedure will favor maximum SPL before feedback and not necessarily optimum monitor
sound quality.
HEAVY LINES INDICATE DIRECT CONNECTIONS TO THE RE 27 and RE 14. Thinner lines show other
connections for clarity.
IMPORTANT NOTES
9
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