Gemini P-07 User Manual
OPERAOPERA
OPERA
OPERAOPERA
BEDIENUNGSHANDBBEDIENUNGSHANDB
BEDIENUNGSHANDB
BEDIENUNGSHANDBBEDIENUNGSHANDB
MANUMANU
MANU
MANUMANU
MANUEL D’INSTRMANUEL D’INSTR
MANUEL D’INSTR
MANUEL D’INSTRMANUEL D’INSTR
P-07P-07
P-07
P-07P-07
TIONS MANUTIONS MANU
TIONS MANU
TIONS MANUTIONS MANU
AL DEL OPERADORAL DEL OPERADOR
AL DEL OPERADOR
AL DEL OPERADORAL DEL OPERADOR
UCTIONSUCTIONS
UCTIONS
UCTIONSUCTIONS
UCHUCH
UCH
UCHUCH
ALAL
AL
ALAL
STEREO POSTEREO PO
STEREO PO
STEREO POSTEREO PO
STEREO VERSTSTEREO VERST
STEREO VERST
STEREO VERSTSTEREO VERST
AMPLIFICADOR DE PODER ESTEREOAMPLIFICADOR DE PODER ESTEREO
AMPLIFICADOR DE PODER ESTEREO
AMPLIFICADOR DE PODER ESTEREOAMPLIFICADOR DE PODER ESTEREO
AMPLIFICAAMPLIFICA
AMPLIFICA
AMPLIFICAAMPLIFICA
TEUR DE PUISSANCE STÉRÉOTEUR DE PUISSANCE STÉRÉO
TEUR DE PUISSANCE STÉRÉO
TEUR DE PUISSANCE STÉRÉOTEUR DE PUISSANCE STÉRÉO
WER AMPLIFIERWER AMPLIFIER
WER AMPLIFIER
WER AMPLIFIERWER AMPLIFIER
ÄRKERÄRKER
ÄRKER
ÄRKERÄRKER
MULTI LANGUAGE INSTRUCTIONS:
ENGLISH.............................................................................................................................................PAGE 4
DEUTSCH...........................................................................................................................................PAGE 6
ESPAÑOL............................................................................................................................................PAGE 8
FRANCAIS........................................................................................................................................PAGE 1 0
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PLEASE READ BEFORE USING APPLIANCE,
IMPORTANT WARNING & SAFETY INSTRUCTIONS!
CAUTION
RISK OF ELECTRICAL SHOCK
DO NOT OPEN!
CAUTION: THIS PRODUCT SATISFIES FCC REGULATIONS WHEN SHIELDED CABLES AND
CONNECTORS ARE USED TO CONNECT THE UNIT TO OTHER EQUIPMENT. TO PREVENT
ELECTROMAGNETIC INTERFERENCE WITH ELECTRIC APPLIANCES SUCH AS RADIOS AND
TELEVISIONS, USE SHIELDED CABLES AND CONNECTORS FOR CONNECTIONS.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT
THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE
(SERVICING) INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE APPLIANCE.
THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN EQUILATERAL
TRIANGLE, IS INTENDED TO ALERT THE USER TO THE PRESENCE OF UNINSULATED
“DANGEROUS VOLTAGE” WITHIN THE PRODUCT’S ENCLOSURE THAT MAY BE OF
SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK TO PERSONS.
READ INSTRUCTIONS: All the safety and operating instructions should be read before
the product is operated.
RETAIN INSTRUCTIONS: The safety and operating instructions should be retained for
future reference.
HEED WARNINGS: All warnings on the product and in the operating instructions
should be adhered to.
FOLLOW INSTRUCTIONS: All operating and use instructions should be followed.
CLEANING: The product should be cleaned only with a polishing cloth or a soft dry
cloth. Never clean with furniture wax, benzine, insecticides or other volatile liquids
since they may corrode the cabinet.
ATTACHMENTS: Do not use attachments not recommended by the product
manufacturer as they may cause hazards.
WATER AND MOISTURE: Do not use this product near water, for example, near a
bathtub, wash bowl, kitchen sink, or laundry tub; in a wet basement; or near a
swimming pool; and the like.
ACCESSORIES: Do not place this product on an unstable cart, stand, tripod, bracket,
or table. The product may fall, causing serious injury to a child or adult, and serious
damage to the product. Use only with a cart, stand, tripod, bracket, or table
recommended by the manufacturer, or sold with the product. Any mounting of the
product should follow the manufacturer’s instructions, and should use a mounting
accessory recommended by the manufacturer.
CART: A product and cart combination should be moved with care. Quick stops, excessive
force, and uneven surfaces may cause the product and cart combination to overturn.
See Figure A.
VENTILATION: Slots and openings in the cabinet are provided for ventilation and to
ensure reliable operation of the product and to protect it from overheating, and
these openings must not be blocked or covered. The openings should never be
blocked by placing the product on a bed, sofa, rug, or other similar surface. This product
should not be placed in a built-in installation such as a bookcase or rack unless proper
ventilation is provided or the manufacturer’s instructions have been adhered to.
POWER SOURCES: This product should be operated only from the type of power
source indicated on the marking label. If you are not sure of the type of power
supply to your home, consult your product dealer or local power company.
LOCATION: The appliance should be installed in a stable location.
NON-USE PERIODS: The power cord of the appliance should be unplugged from the
outlet when left unused for a long period of time.
GROUNDING OR POLARIZATION:
• If this product is equipped with a polarized alternating current line plug (a plug
having one blade wider than the other), it will fit into the outlet only one way. This is
a safety feature. If you are unable to insert the plug fully into the outlet, try reversing
the plug. If the plug should still fail to fit, contact your electrician to replace your
obsolete outlet. Do not defeat the safety purpose of the polarized plug.
• If this product is equipped with a three-wire grounding type plug, a plug having a
third (grounding) pin, it will only fit into a grounding type power outlet. This is a
safety feature. If you are unable to insert the plug into the outlet, contact your
electrician to replace your obsolete outlet. Do not defeat the safety purpose of the
grounding type plug.
POWER-CORD PROTECTION: Power-supply cords should be routed so that they are
not likely to be walked on or pinched by items placed upon or against them, paying
particular attention to cords at plugs, convenience receptacles, and the point where
they exit from the product.
OUTDOOR ANTENNA GROUNDING: If an outside antenna or cable system is
connected to the product, be sure the antenna or cable system is grounded so as to
provide some protection against voltage surges and built-up static charges. Article
810 of the National Electrical Code, ANSI/NFPA 70, provides information with
regard to proper grounding of the mast and supporting structure, grounding of the
lead-in wire to an antenna discharge unit, size of grounding conductors, location of
antenna-discharge unit, connection to grounding electrodes, and requirements for
the grounding electrode. See Figure B.
LIGHTNING: For added protection for this product during a lightning storm, or when it
is left unattended and unused for long periods of time, unplug it from the wall outlet
and disconnect the antenna or cable system. This will prevent damage to the
product due to lightning and power-line surges.
POWER LINES: An outside antenna system should not be located in the vicinity of
overhead power lines or other electric light or power circuits, or where it can fall into
such power lines or circuits. When installing an outside antenna system, extreme
care should be taken to keep from touching such power lines or circuits as contact
with them might be fatal.
OVERLOADING: Do not overload wall outlets, extension cords, or integral
convenience receptacles as this can result in a risk of fire or electric shock.
OBJECT AND LIQUID ENTRY: Never push objects of any kind into this product
through openings as they may touch dangerous voltage points or short-out parts
that could result in a fire or electric shock. Never spill liquid of any kind on the product.
SERVICING: Do not attempt to service this product yourself as opening or removing
covers may expose you to dangerous voltage or other hazards. Refer all servicing to
qualified service personnel.
DAMAGE REQUIRING SERVICE: Unplug this product from the wall outlet and refer
servicing to qualified service personnel under the following conditions:
• When the power-supply cord or plug is damaged.
• If liquid has been spilled, or objects have fallen into the product.
• If the product has been exposed to rain or water.
• If the product does not operate normally by following the operating instructions. Adjust only
those controls that are covered by the operating instructions as an improper adjustment of
other controls may result in damage and will often require extensive work by a qualified
technician to restore the product to its normal operation.
• If the product has been dropped or damaged in any way.
• When the product exhibits a distinct change in performance, this indicates a need for service.
REPLACEMENT PARTS: When replacement parts are required, be sure the service
technician has used replacement parts specified by the manufacturer or have the
same characteristics as the original part. Unauthorized substitutions may result in
fire, electric shock, or other hazards.
SAFETY CHECK: Upon completion of any service or repairs to this product, ask the
service technician to perform safety checks to determine that the product is in
proper operating condition.
WALL OR CEILING MOUNTING: The product should not be mounted to a wall or ceiling.
HEAT: The product should be situated away from heat sources such as radiators,
heat registers, stoves, or other products (including amplifiers) that produce heat.
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p-07
INTRODUCTION:
Congratulations on purchasing your Gemini Power Amplifier. This state
of-the-art power arnplifier includes the latest features and is backed by
a three year limited warranty. Prior to use, we suggest that you
carefully read all the instructions.
FEATURES:
• State-of-the-art circuitry for the finest sound quality and reliability
• Protection Circuitry (short circuit, thermal cutoff, sub/ultrasonic frequency filters, turn-on
delay, main fuse, secondary fuses)
• Unbalanced stereo inputs with RCA type jacks
• Signal ground lift switch eliminates hum from connection loops
• Large blue-light illuminated VU meters to give you greater control
• Ultra-modern design with professional 19" rack mounts
• Front-to-rear airflow with variable speed fan control for maximum cooling and quietest possible operation
• Compact 2U well balanced enclosure
• Steel reinforced chassis construction for durability and longevity
CAUTIONS:
1. Read all operating instructions before using this equipment.
2. To reduce the risk of electrical shock, do not open the unit. There are
NO USER REPLACEABLE P ARTS INSIDE. Please cont act the Gemini
Customer Service Department or your authorized dealer to speak to a
qualified Gemini Sound Products technician.
3. Be sure to allow adequate front and rear ventilation to avoid possible
heat damage to your equipment.
4. Be sure that AC power is OFF and all level controls are set to MINIMUM
before making connections. This will eliminate any chance of unexpected,
loud audio transients that could damage your speaker systems.
IN THE USA: IF YOU EXPERIENCE PROBLEMS WITH THIS UNIT,
PLEASE CALL 1 (732) 738-9003 FOR GEMINI CUSTOMER SERVICE.
DO NOT ATTEMPT TO RETURN THIS EQUIPMENT TO YOUR DEALER.
5. Be sure that AC power is OFF when changing modes of operation
and when changing the position of the Ground Lift Switch.
6. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. Operators of
electronic equipment should in no way be in contact with water.
7. When connecting to AC power line be sure you haven’t lost the ground
connection by using an adapter or extension cord without a 3 prong plug.
FRONT P ANEL:
POWER SWITCH: POWER SWITCH (7) turns the unit on and off.
POWER LED: The POWER LED (8) lights when the power is on. If the
POWER LED (8) does not light, refer to the trouble-shooting guide.
LEVEL CONTROLS: LEVEL CONTROLS (9) control the input levels for
each channel.
VU METERS: Large blue-light illuminated VU METERS (10) display the
output level of each channel.
OPERATION:
STEREO OPERA TION:
The unit has two channels for stereo operation. Each channel provides
a separate signal at the speaker outputs. The following instructions are
for use with 4
1. With the power OFF, connect your input cables to the CHANNEL A and
CHANNEL B inputs using the RCA INPUT JACKS (5)
2. Connect your speakers to the CHANNEL A and CHANNEL B SPEAKER
OUTPUTS (6). THE TOT AL SPEAKER LOAD MUST BE AT LEAST 4
PER CHANNEL.
3. With the LEVEL CONTROLS (9) of both channels set to zero (fully
counterclockwise), turn the POWER SWITCH (8) ON. With the level
controls of your MIXER or other INPUT device turned all the way DOWN,
turn the amplifier level controls all the way up for desired loudness from
your speakers.
4. Now adjust your MIXER or other INPUT source to your desired listening
level. You also have the choice of keeping the volume of both speakers
equal, or for certain situations you can adjust the volume so one side will
be louder than the other.
ΩΩ
ΩΩ
Ω or 8
Ω speakers of matched power ratings.
ΩΩ
ΩΩ
USING THE GROUND LIFT SWITCH:
Depending on how your sound system is hooked up, sometimes
applying the ground will create a quieter signal path. Sometimes lifting
the ground can eliminate ground loops and that annoying
hum to give you quieter and cleaner overall sound.
ΩΩ
Ω
ΩΩ
8. DO NOT USE ANY SPRAY CLEANER OR LUBRICANT ON ANY
CONTROLS OR SWITCHES.
CONNECTIONS:
REAR PANEL
AC POWER SECTION:
AC INLET: AC INLET (1) is used to attach the power cord to the unit.
FUSE: FUSE (2) replace with proper type and rating.
AC LINE VOL TAGE SWITCH: AC LINE VOLTAGE SWITCH (3) allows
reconfiguring amplifier for either 110-120 V or 220-240 V AC lines.
GROUND LIFT SWITCH: GROUND LIFT SWITCH (4) is used to lift the
ground from the chassis.
(SEE THE GROUND LIFT SWITCH INSTRUCTIONS FOR MORE DET AIL.)
INPUT SECTION:
RCA INPUT JACKS: Your amplifier has unbalanced stereo RCA (5) type
jacks, with the tip of the jack being positive (+) and the sleeve part being
negative (-), ground. Connect the output of your mixer here.
OUTPUT SECTION:
Disconnect unit from the AC power source before making any
connections. Pay close attention to polarity when connecting your
speakers. (Connect the positive wire to the red terminal and the
negative wire to the black terminal). Connecting your speakers using
the wrong polarity will not damage your speakers, but will impact the
quality of the sound (lack of bass and incorrect stereo image).
SPEAKER OUTPUTS: The SPEAKER OUTPUT (6) connectors are
terminals that will accept a standard banana plug, or bare wire. Make
sure that all the connections are clean when using bare wire connections.
If any strands of wire from one connector touch the connector next to it,
the sound will distort, and your amplifier will overheat.
NOTE: TOTAL SPEAKER IMPEDANCE MUST NOT BE LOWER THAN 4
ΩΩ
Ω
(OHM) PER CHANNEL.
ΩΩ
1. With the power amp ON, listen to the system in idle mode (no music or
signal) with the ground ON. The GROUND LIFT SWITCH (4) will be in
the left position.
2. Turn the power OFF before moving the GROUND LIFT SWITCH (4). Now
lift the ground by moving the GROUND LIFT SWITCH to the right. Turn
the power back ON and listen to determine which position makes the
overall sound quieter with the least amount of noise and hum.
CAUTION: DO NOT DISCONNECT THE AC GROUND ON THE POWER AMPLIFIER IN ANY WAY.
THIS CAN BE VERY HAZARDOUS!!
SPECIFICA TIONS:
Output Power EIA: 1kHz @ 1% THD, Wrms
Both Channels Driven 8Ω:...……….……...........................................................…………………………70
Both Channels Driven 4Ω:……................................….…..............................……………………………90
Dynamic Headroom, dB:
At 8Ω:……………………………..................................……………..………….........................…………1.5
At 4Ω:…………………………..................................…...........................…………………………………3.3
Frequency Response:.........................................................………………………………..30 Hz – 50 kHz
Total Harmonic Distortion:........................................…................less than 0.1%, typical 0.05% at 1 kHz
Signal to Noise ratio:.................................……………........................…90 dB below rated power @ 8Ω
Damping factor: …………….........................................................………………..greater than 150 @ 8Ω
Slew rate:………………………………………………….........................................................…….10 V/µS
Voltage gain, dB:……………………................................……………………….........................………..27
Input Sensitivity (for rated power at 8Ω):……..........................................................…….…...…….1Vrms
Input Impedance (unbalanced):...………................................……………..........................…………10 k.
Power consumption (at rated power at 4Ω, both channels driven):..........……………………......…400 W
AC Power Requirements:........................…………..….................….110-120 V or 220-240 V 60 / 50 Hz.
Indicators:……...................…...…………........................…………1VU-meter per Channel 1 Power LED
Cooling: ……..........................................................………Variable Speed Fan, Front-to-Rear Forced Air
Protection:...................Short Circuit, Thermal Cut-off, Sub/Ultrasonic Frequency Filters, Turn-on Delay,
Main Fuse, Secondary DC Fuses
Connectors:
Inputs:………………...............................…………………………..........................…………….RCA Jacks
Speaker Outputs:……………………………..........................................................………….Binding Posts
Dimensions:…………....…………........................…...………..19"W x 11"D x 3.5"H (483 x 280 x 89 mm)
Weight :…………………………..........................………................................…………..12.9 lbs (5.85 kg)
SPECIFICATIONS AND DESIGN ARE SUBJECT TO CHANGE
WITHOUT NOTICE FOR PURPOSE OF IMPROVEMENT.
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