Gemini XPM-3000 User Manual
OPERATIONS MANUAL
BEDIENUNGSHANDBUCH
MANUAL DEL OPERADOR
MANUEL D’INSTRUCTIONS
XPM-3000
POWER AMPLIFIER
STEREO VERSTÄRKER
AMPLIFICADOR DE PODER ESTEREO
AMPLIFICATEUR DE PUISSANCE STÉRÉOV
MULTI LANGUAGE INSTRUCTIONS:
English.......................................................................................................................Page 5
Deutsch.....................................................................................................................Page 9
Español....................................................................................................................Page 14
Francais.................................................................................................Page 19
Italiano...................................................................................................Page 24
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230V
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120V
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Gemini Sound Products Corp.
120 Clover Place, Edison, NJ 08818• USA
Tel (732) 738-9003 • Fax (732) 738-9006
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120V
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230V
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Introduction
Connections, Controls and Indicators
Congratulations on purchasing a Gemini XPM-3000 Power Amplifier.
This state of the art power amplifier includes the latest features and is
backed by a five year limited warranty. Prior to use, we suggest that you
carefully read all the instructions.
Features
• MOSFET output stage technology for the finest sound quality and
reliability
• 3 Channel Operation: 2 Satellite Channels (Channels A and B) and 1
Subwoofer Channel
• Full range operation mode for set up without subwoofer(s)
• 2-way Linkwitz-Riley crossover with switchable crossover frequency
for flexible set up of subwoofer and satellite channels
• Switchable low frequency boost on the subwoofer channel optimizes
subwoofer performance
• Stable operation of subwoofer channel down to a 2 Ohm load
• Post crossover line level outputs for chaining additional subwoofers
and satellite speakers
• High output power to drive professional loudspeakers without clipping
• Oversized toroidal transformer, filter and heatsinks for better low end,
transparency and stability
• Comprehensive protection circuitry (short, overheat, DC, subsonic
and RF filters, turn-on delay) with high current speaker protection
relays
• True clip LEDs for better control
• Signal ground lift switch eliminates hum from connection loops
• Flexible input configuration with active balanced inputs; additional
input connectors to chain amps
• Outputs: 5-way binding posts in 120V; Neutrik Speakon connectors in
230V
• 2 parallel 5-way binding posts on the subwoofer output (in 120V only)
allows for easy set up with dual subwoofers
• Efficient dual aluminum extrusion heatsink design for thermal stability
and reliability
• Front-to-Rear airflow with 2 speed dual fan control
• Turn-on In-rush current limiting circuitry
• Compact 2U well balanced enclosure
• Steel reinforced chassis construction for durability and longevity
Cautions
Read all operating instructions before using this equipment.
To reduce the risk of electrical shock, do not open the unit. There
are NO USER REPLACEABLE PARTS INSIDE. Please contact the
Gemini Service Department or your authorized dealer to speak to a
qualified service technician.
Be sure to allow adequate front and rear ventilation to avoid possible
heat damage to your equipment.
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.
Be sure that AC power is OFF when changing modes of operation and
when changing the position of the ground lift switch.
DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. Operators of
electronic equipment should in no way be in contact with water.
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.
DO NOT USE ANY SPRAY CLEANER OR LUBRICANT ON ANY
CONTROLS OR SWITCHES.
Rear Panel
Note: 120V and 230V units have different types of output
connectors on the rear panel.
Input Section:
There are two parallel input connectors (one female XLR and one
1/4” jack) per channel. Either can be used as an input or as a link to
chain amplifiers.
XLR Input Jacks (11, 14): electronically balanced inputs accept a
standard XLR male connector. Pin 1 = shield/ground, pin 2 = hot or
positive (+) and pin 3 = cold or negative (-).
1/4" Input Jacks (12, 13): accept a balanced as well as an unbalanced
line level signal. The unbalanced line uses a standard tip-sleeve
connection. The tip is positive and the sleeve is negative/ground. The
balanced line uses a tip-ring-sleeve connection. Tip = hot or positive
(+), ring = cold or negative (-), and sleeve = shield/ground.
Signal Ground Lift Switch (15) is used to lift the balanced input
connectors’ ground/shield from the amplifier’s ground. When the
signal ground is lifted, the sound source disconnects from the
amplifier’s ground preventing ground loops which can generate hum
and noise. See the Signal Ground Lift Switch Instructions for more
detail.
AC Power Section:
Fuse (7): replace fuse with those of proper type and rating.
AC Cord Outlet (6) is used to attach the power cord to the unit.
Signal Processing Section:
Disconnect the unit from the AC power source before making any
connections.
Crossover Switch (3): Use the crossover
switch to set the crossover frequency
between the subwoofer and the satellite
channels (Channels A and B) at 120 Hz or
180 Hz. Or you can set the crossover
switch to FULL RANGE if you do not wish
to use a subwoofer (the full range signal
will then go to the satellite channels).
Low Frequency Boost Switch (4): The LF Boost Switch can be used to
optimize the performance of the subwoofer. The LF boost effect uses
specialized filter circuitry, including a subsonic filter, to cut off
subsonic frequencies which keeps the subwoofer from wasting
available energy. The filter also provides an
optional +3 dB or +6 dB boost at 40 Hz which
is suitable for most subwoofers. The circuitry
optimizes the performance of the
subwoofer by focusing the signal’s energy
to match the subwoofer’s characteristics.
Set the switch to be FLAT, +3 dB or +6
dB based on your subwoofer and your
experience.
NOTE: The LF Boost settings only effect the subwoofer
channel and will not effect the satellite channels.
Line Outputs (1, 2, 5): the amplifier has quasi balanced post crossover
line outputs. The line outputs connectors are 1/4” TRS and can be
used to connect to additional amplifiers (optional).
Output Section:
Speaker Outputs:
Pay close attention to polarity (shown on the back of the unit) when
connecting your speakers. Connecting your speaker systems using the
wrong polarity will not damage your speakers, but it will impact the
quality of the sound (lack of bass and incorrect stereo image).
Speaker Outputs for 120V Unit (8, 9, 10): the speaker output
connectors are 5-way binding posts that will accept standard banana
plugs, spade lugs or bare wire. Make sure that all the connections are
clean when using bare wire connections. If any strands of wire from
(5)
one connector touch the adjacent connector, the sound will be
distorted, and your amplifier will overheat and go into protection
mode.
NOTE (120V only): Two subwoofer output connectors are
provided to connect two subwoofers with separate cables.
These outputs are wired in parallel and are connected to a
mono subwoofer channel (subwoofer output is not
directional and does not require a stereo signal). The
combined load for the subwoofer channel must not be less
than 2 Ohms (a single 2 Ohm speaker OR two 4 Ohm
speakers OR four 8 Ohm speakers).
Speaker Outputs for 230V Unit (8, 9, 10): Neutrik Speakon connectors
are provided to connect speakers to the amplifier quickly and easily.
They are high current rated and provide very stable and durable
contacts. Every Speakon connector has pin 1- as negative and pin
1+ as positive.
WARNING: The XPM-3000 amplifier is designed to handle
low impedance loads and will operate normally with most
2 Ohm subwoofers or subwoofer combinations. The
amplifier will operate normally with most 4 Ohm speakers
on the satellite channels. However, for optimal
performance and reliability we recommend using
subwoofers and speakers with higher impedance (4 Ohms
for the subwoofer and 8 Ohms for the satellite channels).
NOTE: There are no bridge connections in this amplifier.
Please refer to the terminals’ color coding for proper
connection polarity.
Front Panel
Power (23): the power switch turns the unit on and off.
Power LED (22): the power LED lights when the power is on. If the
power LED does not light, refer to the trouble shooting guide.
Signal LED (16): the signal LEDs for each channel show when a signal
is present.
Clip LED (17): the amplifier has true clip LEDs to help you properly
control the amplifier’s output and achieve undistorted sound. The clip
LEDs for each channel light when your signal level is so strong that
the distortion reaches 1% THD. The clip LED should not remain
constantly on or flash repeatedly during operation. For clean sound
reproduction, the clip should only light occasionally for an instant. If
the LED remains on or flashes repeatedly, you will hear distorted
sound that can be damaging to your speaker system. If this occurs,
reduce the signal level by lowering the input level control for the
channel that is clipping or reduce the level at the source. If the clip
LED lights when no signal is present, it may indicate a RF signal on
the output which may cause damage to speakers (the RF signal will
not be audible).
Protect LED (18): when you first turn on the amplifier, the protect LEDs
light briefly during a turn-on delay which indicates that the outputs are
disconnected internally. There will be an audible click when the
outputs reconnect and the protect LEDs will turn off. Otherwise, the
protect LED indicates that there is a problem either in the amplifier’s
external connections, load or temperature conditions or its internal
functions. If one of these situations occur, the amplifier senses the
problem and automatically switches into protection mode. The LED
will light to warn you of the trouble and the amplifier will stop working.
If this occurs, switch off the amplifier and refer to the Trouble
Shooting Guide. If the protect LED remains lit when resuming
amplifier operation, do not use the amplifier and contact an
authorized service technician.
Level Controls (19, 20, 21): establish the input levels required for each
channel.
Operating Instructions
THE AMPLIFIER’S POWER MUST BE TURNED OFF
WHEN CHANGING SETTINGS.
Using the Amplifier With Subwoofer(s) and Satellite
Speakers
The XPM-3000 has two channels for stereo operation and a common
subwoofer channel. The amplifier has a built in crossover to separate the
input signal between the stereo satellite channels and the mono
subwoofer channel (the low frequency signal feeding the subwoofer is
not directional and does not require stereo operation). The amplifier also
provides an optional low frequency boost for the subwoofer channel to
optimize the performance of your subwoofer.
1. With the power off, connect your input cables to the channel A and B
inputs using either the XLR INPUT JACKS (11, 14) or 1/4" INPUT
JACKS (12, 13) for each channel. The other channel A and channel
B inputs can be used to link to an additional amplifier.
2. Connect the subwoofer(s) to the subwoofer SPEAKER OUTPUT(S)
(10). Connect the full range loudspeakers to the channel A and
channel B SPEAKER OUTPUTS (8, 9). THE TOTAL SPEAKER
LOAD MUST BE AT LEAST 4 OHMS PER CHANNEL FOR THE
SATELLITE CHANNELS AND 2 OHMS FOR THE SUBWOOFER. If
you try to operate at a lower impedance, the amplifier will overheat
and then go into protection mode and stop operation until you correct
the load conditions.
3. If you choose to use additional amplifiers, connect the additional
amplifiers to the XPM-3000 using the LINE OUTPUT (1, 2, 5)
connectors.
NOTE: The line outputs tap the signal after the crossover
and the low frequency boost but before the level controls.
4. Use the CROSSOVER SWITCH (3) to set the crossover frequency
between the subwoofer and the satellite channels (Channels A and B)
at 120 Hz or 180 Hz.
5. Use the LOW FREQUENCY BOOST SWITCH (4) to optimize the
performance of the subwoofer. The LF boost effect uses specialized
filter circuitry, including a subsonic filter, to cut off subsonic
frequencies which keeps the subwoofer from wasting available
energy. The filter also provides an optional +3 dB or +6 dB boost at
40 Hz which is suitable for most subwoofers. Set the switch to be
FLAT, +3 dB or +6 dB based on your subwoofer and your experience.
NOTE: The LF Boost settings only effect the subwoofer
channel and will not effect the satellite channels.
6. With the LEVEL CONTROLS (19, 20, 21) of the channels set to zero
(fully counterclockwise), turn the POWER (23) on. Apply a signal to
the input of the amplifier. The level of the input signal should be as
high as you will ever need it to be. This way, it will be as high above
the amplifier’s noise floor as possible, ensuring an excellent
performance and signal to noise ratio. Adjust the LEVEL CONTROLS
for each channel to achieve the desired maximum listening level.
Note, when the clip LEDs light, there is distortion present in the
amplifier’s output section. If a clip LED remains on or flashes
repeatedly, reduce the signal level by lowering the input level control
for the channel that is clipping or reduce the level at the source.
Using the Amplifier Without Subwoofer(s)
The XPM-3000 gives you the option of operating the amplifier as you
would a conventional amplifier, without using subwoofer(s). This flexibility
is especially useful if you don’t want to transport your subwoofers at
times.
1. With the power off, connect your input cables to the channel A and B
inputs using either the XLR INPUT JACKS (11, 14) or 1/4" INPUT
JACKS (12, 13) for each channel. The other channel A and channel
B inputs can be used to link to an additional amplifier.
(6)
2. Connect the loudspeakers to the channel A and channel B SPEAKER
OUTPUTS (8, 9). THE TOTAL SPEAKER LOAD MUST BE AT
LEAST 4 OHMS PER CHANNEL FOR CHANNELS A AND B. If you
try to operate at a lower impedance, the amplifier will overheat and
then go into protection mode and stop operation until you correct the
load conditions.
3. If you choose to use additional amplifiers, connect the additional
amplifiers to the XPM-3000 using the LINE OUTPUT (1, 2)
connectors.
4. Set the CROSSOVER SWITCH (3) to FULL RANGE so that the full
range signal will go to the satellite channels (Channels A and B).
5. With the LEVEL CONTROLS (20, 21) of the channels set to zero
(fully counterclockwise), turn the POWER (23) on. Apply a signal to
the input of the amplifier. The level of the input signal should be as
high as you will ever need it to be. This way, it will be as high above
the amplifier’s noise floor as possible, ensuring an excellent
performance and signal to noise ratio. Adjust the LEVEL CONTROLS
for each channel to achieve the desired maximum listening level.
Note, when the clip LEDs light, there is distortion present in the
amplifier’s output section. If a clip LED remains on or flashes
repeatedly, reduce the signal level by lowering the input level control
for the channel that is clipping or reduce the level at the source.
Using the Signal Ground Lift Switch
Depending on your system configuration, sometimes applying the
ground will create a quieter signal path. Sometimes lifting the ground can
eliminate ground loops and hum to create a quieter signal path.
1. With the power amp on, listen to the system in idle mode (no signal
present) with the ground applied (the SIGNAL GROUND LIFT
SWITCH (15) in the left position).
2. Then turn the power off before moving the SIGNAL GROUND
LIFT SWITCH (15). Lift the ground by moving the SIGNAL GROUND
LIFT SWITCH to the right, turn the power back on and listen to
determine which position will provide a signal devoid of background
noise and hum. Keep the SIGNAL GROUND LIFT SWITCH in the
ground position if the noise level remains the same in either position.
CAUTION: DO NOT TERMINATE THE AC GROUND ON THE POWER
AMPLIFIER IN ANY WAY. TERMINATION OF THE AC GROUND CAN
BE HAZARDOUS.
Specifications
Damping Factor:
Channels A and B................................................................>300 @ 8 Ohms
Subwoofer Channel.............................................................>600 @ 8 Ohms
Slew Rate.................................................................................25 V/µS
Voltage Gain.........................................................................................33 dB
Input Sensitivity:
Channels A and B (for rated power at 8 Ohms)....................>300 @ 8 Ohms
Subwoofer Channel (for rated power at 4 Ohms)...................>600 @ 8 Ohms
Input Impedance Unbalanced....................................................10 kOhms
Input Impedance Balanced.......................................................20 kOhms
Power consumption.....................................................................1200 VA
Note: power consumption is given at rated power at 8 Ohms per channel
(Channels A and B), 4 Ohms on the subwoofer channel, all three
channels driven.
AC Power Requirement:
(power connection is factory configured)............................120V/ 60 Hz
230V/ 50 Hz
Indicators.......................................................................1 Power Indicator
1 Signal LED per channel
1 Clip LED per channel
1 Protect LED per channel
Cooling....................................2 Speed Dual Fan; Front-to-Rear Forced Air
Protection........................Short Circuit, DC, Thermal Cut-off, Sub/ultrasonic
Frequency Filters, In-rush Current Limiter, Turn-on Delay
Connectors:
Balanced/Unbalanced Inputs.......................................................1/4" Jack
Balanced Inputs..............................................................XLR Female Jack
Line Outputs...............................................................................1/4" Jack
Speaker Outputs (120V unit).......................................5-way binding posts
2 Parallel 5-way binding posts for subwoofers
Speaker Outputs (230V unit)...........Speakons (ch.A, ch.B and subwoofer)
Dimensions...................................19" x 13.75" x 3.5" (483 x 350 x 89 mm)
Weight....................................................................................31 lbs (14 kg)
* Specifications and design are subject to change without notice for
purpose of improvement.
Output Power EIA: 1kHz @ 1% THD (100 Hz @ 1% THD for the
subwoofer channel)
Ouput Power Chart:
Impedance
A and B
Speakers
Note: the power for channels A and B is given as per channel, both
channels driven
Frequency Response - 3 Channel Operation:
Channels A and B.......................................Crossover Frequency - 60 kHz
Subwoofer Channel.....................................20 Hz - Crossover Frequency
Frequency Response - Full Range Operation:
Channels A and B.................................................................20 Hz - 60 kHz
Crossover:
Type.................................................................2nd order Linkwitz-Riley
Crossover Frequency....................................................120 Hz/180 Hz
Low Frequency Boost:
Boost Frequency..............................................................................40 Hz
Boost Level..............................................................................+3 dB/+6 dB
Signal to Noise Ratio..........................100 dB below rated power, 8 Ohms
Not Used
8 Ohms
4 Ohms
Not
Used
220
300
Subwoofers
8 Ohms
260
220
200
4 Ohms 2 Ohms
425
380
190
270
350
165
250
600
540
530
(7)
SYMPTOM CAUSE SOLUTION
UNIT DOES NOT PRODUCE SOUND. POWER
LED DOES NOT LIGHT.
POWER LED LIGHTS, BUT NO SOUND IS
PRODUCED BY AMPLIFIER.
SOUND IS PRESENT BUT VOLUME IS TOO
LOW EVEN THOUGH SOURCE DEVICE IS
SET TO A HIGH LEVEL.
VERY LITTLE OR NO OUTPUT FROM
SUBWOOFER OR
NO BASS FROM FULL RANGE SPEAKERS
WHEN OPERATING WITHOUT
SUBWOOFERS.
LOUD 50/60 HZ OR 100/120 HZ HUM IS
HEARD AT ALL TIMES THROUGH THE
SPEAKER SYSTEMS.
SOUND IS DISTORTED.
PROTECT LED REMAINS LIT OR GOES ON
AND OFF INTERMITTENTLY AFTER USING
AMPLIFIER FOR A SHORT TIME.
FUSE BLOWS INTERMITTENTLY.
PROTECT LED(S) STAY ON WITH NO
SPEAKERS CONNECTED AND WITH THE
AMPLIFIER COOLED DOWN.
• POWER SWITCH NOT IN ON POSITION.
• POWER CABLE NOT CONNECTED TO AMPLIFIER
OR TO OUTLET.
• AC OUTLET NOT ACTIVE.
• MAIN AMPLIFIER FUSE DEFECTIVE.
• NO INPUT SOURCE SIGNAL.
• INPUT SOURCE NOT CONNECTED.
• INPUT CONNECTING CABLE DEFECTIVE.
• SPEAKER(S) NOT CONNECTED.
• SPEAKER CABLE DEFECTIVE.
• SPEAKER SYSTEM(S) INOPERATIVE.
• AMPLIFIER’S LEVEL CONTROLS ARE SET TO
ZERO.
• AMPLIFIER INPUT LEVEL CONTROLS ARE SET
TOO LOW.
• WRONG PIN CONNECTIONS IN CABLES.
• FREQUENCY SWITCH IS IN THE FULL RANGE
MODE POSITION.
• IMPROPER OR DEFECTIVE GROUND
CONNECTION AT INPUTS. IMPROPER OR
DEFECTIVE GROUND AT INPUT SOURCE
DEVICE(S).
• IMPROPER OR DEFECTIVE GROUND
CONNECTION ON AC OUTLET.
• GROUND LOOP THROUGH AC LINE
CONNECTION/RACK MOUNTING.
• DISTORTION OCCURRING IN SOURCE DEVICE.
• INPUT LEVEL IS SET TOO HIGH.
• UNIT IS OPERATING AT EXCESSIVELY HIGH
TEMPERATURE.
• EXTREMELY LOW SPEAKER IMPEDANCE.
• SHORT IN SPEAKER CONNECTORS,
SPEAKER CABLE OR SPEAKER SYSTEM.
• SPEAKER LOAD IMPEDANCE IS TOO LOW.
• TYPE OR RATING OF THE FUSE IS NOT
CORRECT.
• FAILED AMPLIFIER.
• MOVE POWER SWITCH TO ON POSITION.
• CONNECT POWER CABLE TO AC SUPPLY.
• CHECK CONDITION OF OUTLET.
• REPLACE AMPLIFIER MAIN POWER FUSE ON REAR
PANEL WITH CORRECT TYPE AND RATING.
• CHECK FOR PROPER FUNCTION OF INPUT
SOURCE DEVICE.
• CHECK INPUT CABLES AND CONNECTIONS.
REPLACE QUESTIONABLE CABLES WITH KNOWN
GOOD CABLES.
• CHECK SPEAKER CABLES AND CONNECTIONS.
REPLACE QUESTIONABLE CABLES WITH KNOWN
GOOD CABLES.
• CHECK OPERATING CONDITION AND STATUS OF
SPEAKER SYSTEM(S). BE SURE THE LEVEL
CONTROLS ARE PROPERLY SET.
• ADJUST LEVEL CONTROLS AS PER INSTRUCTIONS.
• USE CORRECT CABLES (AS SHOWN ON BACK OF
UNIT).
• MOVE THE FREQUENCY SWITCH TO THE 120 HZ
OR THE 180 HZ POSITION.
• CHECK FOR PROPER AC LINE GROUND ON POWER
AMP AND ALL INPUT DEVICES.
• CHECK INPUT CABLES FOR ALL SOURCE DEVICES
AND SIGNAL PROCESSING AS WELL AS INPUT
CABLES TO POWER AMPLIFIER. CHECK POSITION
OF GROUND LIFT SWITCH AS PER INSTRUCTIONS
FOR LIFTING THE GROUND.
• NEVER LIFT THE AC LINE GROUND ON THE POWER
AMPLIFIER. IF YOU ARE NOT TOTALLY FAMILIAR WITH
GROUND LIFTING OR UNIFICATION PROCEDURES,
DO NOT ATTEMPT THEM WITHOUT FIRST
CONSULTING YOUR DEALER OR A QUALIFIED
SOUND TECHNICIAN FOR MORE INFORMATION ON
GROUNDING. IMPROPERLY DONE, SUCH
PROCEDURES CAN POSE A SAFETY AND/OR FIRE
HAZARD.
• CHECK CLIP INDICATORS ON INPUT SOURCE
DEVICES AND RESET LEVELS IF NECESSARY TO
ELIMINATE DISTORTION.
• ADJUST LEVEL CONTROLS AS PER INSTRUCTIONS.
• CHECK THAT AMPLIFIER IS ADEQUATELY
VENTILATED ON THE FRONT AND REAR PANELS
WHERE THE AIR VENTS AND FANS ARE LOCATED.
IF OVERHEATED, LET THE AMPLIFIER COOL DOWN
BEFORE APPLYING AN INPUT SIGNAL.
• VERIFY SPEAKER SYSTEM IMPEDANCES. BE SURE
THE TOTAL SPEAKER SYSTEM IMPEDANCE IS AT
LEAST 4 OHM PER CHANNEL FOR CHANNELS A AND
B, AND AT LEAST 2 OHM FOR THE SUBWOOFER
CHANNEL. IF YOU ARE NOT SURE OF YOUR TOTAL
SPEAKER IMPEDANCE LOAD, CONTACT YOUR
DEALER FOR MORE INFORMATION.
• CHECK CONDITION OF SPEAKER CABLES.
• IF USING BARE WIRE CONNECTIONS ON THE
OUTPUTS OF THE AMPLIFIER, BE SURE THAT NO
STRANDS FROM ONE CONNECTOR ARE TOUCHING
ANY OTHER CONNECTOR.
• CHECK FOR SHORTS ON THE OUTPUTS.
• CHECK YOUR SPEAKER IMPEDANCE (INFO FROM
DEALER).
• CHECK THAT THE FUSE TYPE AND RATING IS
CORRECT.
• CONTACT THE GEMINI SERVICE DEPARTMENT OR
YOUR AUTHORIZED DEALER TO SPEAK TO A
QUALIFIED SERVICE TECHNICIAN. IN THE U.S.A. CALL
1-732-969-9000
(8)
Einleitung
Wir gratulieren Ihnen zum Kauf eines Gemini XPM-3000
Endverstärkers. Dieser moderne Endverstärker enthält die neuesten
Funktionen und besitzt eine fünfjährige begrenzte Garantie. Vor
Anwendung dieses Gerätes bitte alle Anweisungen sorgfältig durchlesen.
Funktionen
• MOSFET-Ausgangsstufen-Technologie für feinste Tonqualität und
Zuverlässigkeit
• Dreikanalbetrieb: 2 Satellitenkanäle (Kanäle A und B) und 1
Tieftonlautsprecherkanal
• Kompletter Frequenzbereich bei Betriebsmodus für Aufbau ohne
Tieftonlautsprecher
• 2-weg Linkwitz-Riley Frequenzweiche mit umschaltbarer
Überschneidungsfrequenz für flexible Anpassung des
Tieftonlautsprechers und der Satelitenkanäle
• Schaltbare Tieftonpegelanhebung am Tieftonlautsprecherkanal
optimiert die Leistung des Tieftonlautsprechers
• Stabiler Betrieb des Tieftonlautsprecherkanals bis zu einer Belastung
von 2 Ohm
• Zusätzliche Ausgänge zum Anschluß weiterer Endstufen für Tiefton-
und Satelitenlautsprecher
• Hohe Ausgangsleistung, um professionelle Lautsprecher ohne
Übersteuerung zu treiben
• Überdimensionierte Ringtransformatoren, Filter und Kühlkörper für
bessere Basis, Transparenz und Beständigkeit
• Umfassender Schutzschaltungsaufbau (Kurzschluß-, Überhitzungs-,
Gleichstrom-, Unterschall- und Funkfilter, Einschaltverzögerung) mit
Hochstrom-Lautsprecher-Schutzrelais
• Echte Übersteuerungs-LEDs für bessere Kontrolle
• Der Signal-Massetrennschalter schaltet das durch Masseschleifen
erzeugte Brummen aus
• Flexible Eingangskonfiguration mit symmetrischen Eingängen;
zusätzliche Eingangsanschlüsse, um Verstärker zu verketten
• Ausgänge: Fünfwegige Polklemmen für 120-V-Versionen; Neutrik
Speakon-Anschlüsse für 230-V-Versionen
• 2 parallele fünfwegige Polklemmen am Tieftonlautsprecherausgang
(nur für 120-V-Einheiten) ermöglichen leichten Aufbau mit Doppel-
Tieftonlautsprechern
• Effiziente Kühlung in doppelten Alu-Profilen bietet
Wärmebeständigkeit und Betriebssicherheit
• Durchgehende Lüfterkühlung mit zwei Ventilatoren und
Zweigeschwindigkeits-Regelung
• Einschaltstrom-Begrenzerschaltkreis
• Kompaktes Gehäuse mit 2 Höheneinheiten
• Stahlverstärkte Chassisausführung für Haltbarkeit und Langlebigkeit
Vorsichtsmaßnahmen
Vor Anwendung des Geräts lesen Sie bitte alle Anweisungen sorgfältig
durch.
Um das Risiko elektrischen Schocks zu vermeiden, dürfen Sie das Gerät
nicht öffnen. DAS GERÄT ENTHÄLT KEINE VOM ANWENDER
ERSETZBARE TEILE. Wenden Sie sich bitte an das Gemini Service
Department oder an Ihren Vertragshändler, um mit einem befähigten
Wartungstechniker zu sprechen.
Sicherstellen, daß die Vorder- und Rückseite gut ventiliert sind, um
mögliche Beschädigung der Ausrüstung durch Überhitzen zu vermeiden.
Sicherstellen, daß der Leistungsstrom ausgeschaltet ist und alle
Tonstärkenregler auf MINIMUM geschaltet sind. Dies wird die Möglichkeit
unerwarteter, lauter Einschwingungen eliminieren, die das
Lautsprechesystem beschädigen könnten.
Sicherstellen, daß der Leistungsstrom ausgeschaltet ist, wenn die
Betriebsarten und die Position des Massetrennschalters geändert
werden.
DAS GERÄT NIEMALS REGEN ODER FEUCHTIGKEIT AUSSETZEN.
Bediener von elektronischen Geräten dürfen unter keinen Umständen
Kontakt mit Wasser haben.
Beim Anschluß an die Netzleitung sicherstellen, daß der Masseanschluß
nicht verlorengeht, wenn eine Adapter- oder Verlängerungsschnur ohne
Schukostecker benutzt wird.
KEIN REININGSSPRAY ODER SCHMIERMITTEL AN DEN REGLERN
ODER SCHALTERN VERWENDEN.
Anschlüsse, Regler und Anzeigen
Rückseite
Hinweis: 120-V- und 230-V-Einheiten haben
unterschiedliche Ausgangsanschlüsse an der Rückseite.
Eingangsbereich:
Jeder Kanal hat zwei parallele Eingangsanschlüsse (eine XLRBuchse und eine 1/4-Zoll-Buchse). Sie können beide als Eingang oder
Verbindung zur Verkettung von Verstärkern benutzt werden.
XLR-Eingangsbuchsen - XLR Input Jacks (11, 14): Elektronisch
symmetrische Eingänge nehmen einen XLR-Standardstecker auf.
Stift 1 = Abschirmung/Masse, Stift 2 = heiß bzw. plus (+), 3 = kalt
bzw. minus (-).
Klinken-Eingangsbuchsen - 1/4" Input Jacks (12, 13): Diese Buchsen
nehmen symmetrische sowie unsymmetrische
Leitungseingangssignale auf. Die unsymmetrische Leitung benutzt
eine Standard-Spitzen-Muffen-Verbindung. Die Spitze ist negativ und
die Muffe positiv geerdet. Die symmetrische Leitung benutzt eine
Spitzen-Ring-Muffen-Verbindung. Spitze = heiß bzw. plus (+), Ring =
kalt bzw. minus (-) und Muffe = Abschirmung/Masse.
Der Signalmasse-Trennschalter - Signal Ground Lift Switch (15) wird
benutzt, um die Masse/Abschirmung der symmetrischen
Eingangssteckverbindungen von der Masse des Verstärkers zu
trennen. Wenn die Signalmasse getrennt ist, wird die Klangquelle von
der Masse der Verstärker getrennt, wodurch Masseschleifen
verhindert werden, die Brummen und Störungen verursachen.
Einzelheiten finden Sie in den Anweisungen für den Signal-
Massetrennschalter.
Netzstrom:
Sicherung - Fuse (7): Beim Auswechseln eine Sicherung ist darauf zu
achten, daß die Sicherungsart und -bemessung korrekt sind.
Netzleitungs-Steckbuchse - AC Cord Outlet (6): Diese Buchse wird
benutzt, um die Netzleitung an der Einheit anzuschließen.
Signalverarbeitungsbereich:
Bevor jegliche Verbindungen hergestellt werden, muß die Einheit von
der Stromquelle getrennt werden.
Frequenzweichenschalter - Crossover Switch (3): Benutzen Sie den
Frequenzweichenschalter, um die
Übergangsfrequenz zwischen dem
Tieftonlautsprecher und den
Satellitenkanälen (Kanäle A und B) bei
120 Hz oder 180 Hz einzustellen. Sie
können den Schalter auch auf FULL RANGE
(Volle Bandbreite) einstellen, falls kein
Tieftonlautsprecher benutzt werden soll (das
Signal für volle Bandbreite wird dann an die
Satellitenkanäle übertragen).
Basspegelanhebungsschalter - Low Frequency Boost Switch (4):
Dieser Schalter kann benutzt werden, um die Leistung des
Tieftonlautsprechers zu optimieren. Für die Pegelanhebung werden
besondere Filterschaltkreise benutzt, einschließlich Subsonic-Filter,
um Subsonic-Frequenzen auszuschalten,
wodurch der Tieftonlautsprecher daran
gehindert wird, Energie zu vergeuden. Die
Filter bieten ebenfalls eine optimale
Verstärkung von +3 dB oder +6 dB bei 40
Hz, welches für die meisten
Tieftonlautsprecher angemessen ist. Die
Schaltung optimiert die Leistung des
(9)
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