Mission Gemini 1-P User manual

GEmini
1-P
Ur
Guide
MISSION
ENGINEING
Inoduion
Congratulations on your purchase of the Mission
Gemini 1-P passive guitar speaker. This product is
designed to be intuitive to setup and operate, and to
provide many years of trouble free service.
However, we recommend that you take a few
moments to read through this User Guide in order
to get the best possible experience with your new
speaker.
bAckound
The Gemini 1-P is a professional quality, passive
speaker cabinet specifically designed for use with
software based music systems such as guitar
modeling amplifiers, cabinet simulators, and digital
audio workstations.
A traditional guitar speaker cabinet is typically
designed to work best in conjunction with a guitar
amplifier. The speaker works within a limited
frequency range, and the cabinet and speaker
themselves contribute to the overall tone. While this
works perfectly with an analog guitar rig, it is not
always an ideal solution for digital systems.
Software based modelers usually implement
guitar cabinet simulators designed to emulate
specific speaker cabinets in software. If the signal
subsequently passes through a physical speaker
cabinet with its own tonal characteristics, it colors
the eventual tone, making the modeling less accurate.
Additionally, guitar speaker cabinets do not often
work well with signals other than guitar such as
keyboards, vocals, and playing back recorded music.
The Mission Gemini amplifiers and cabinets resolve
these problems as they are specifically designed to
work with software based music systems.
ftur
The Gemini 1-P is a passive speaker cabinet designed
to work with an external power amplifier, and
faithfully reproduce a modeled signal chain. The
cabinet is fitted with a 12” low frequency driver, and
1” high frequency compression driver in a co-axial
configuration: The high frequency driver is mounted
in the center of the low frequency driver.
The Coaxial driver configuration has been used for
over sixty years in professional audio monitoring and
high-end audiophile applications. The benefits include
a wider field of dispersion that’s more uniform across
the frequency spectrum. This means listeners do not
have to be positioned directly in front of the speaker
to get the best experience. The full frequency range
also appears to the listener to originate from a single
source, without any apparent physical separation
between low and high frequencies. Since the high
frequency driver is located at the center of the driver,
the cabinet can be used with a microphone, with
the high frequencies accentuated as the microphone
is positioned towards the center of the speaker,
replicating the on/off axis positioning of a traditional
guitar cab. These features make the Gemini 1-P ideal
for live, recording, and monitoring use.
REcommEndEd
Amplifis
The Gemini 1-P works best with solid state power
amplifiers rated between 50w and 250w RMS into 8
ohms, or tube amplifiers rated between 10w and 75w
RMS into 8 ohms. Amplifiers rated at higher than the
recommended output power can certainly be used,
but care should be taken not to consistently input
greater than the recommended levels as damage to
the drivers can occur.
Gemini passive cabinets feature a unique protection
circuit that reduces the likelihood of damage to the
high frequency driver if input power should exceed
250w. An analog compressor tracks the source
material and provides almost 5dB of attenuation at
peak power. This feature protects the driver against

damage while maintaining the musical quality of the
signal.
ConnEions
There is one input and one output on the rear panel
of the Gemini 1-P. Connect the output of one channel
of your power amplifier to the input of the Gemini.
If you have one or more amplifiers with multiple
channels you can connect Gemini 1-P cabinets to
each channel to increase the overall sound pressure
level and/or to support stereo or other multi-channel
audio signals.
Gemini cabinets use a combination connector that
supports either Speakon or ¼” jack connections.
Speakon cables are recommended, if available, as
they provide a safer and more reliable connection in
most cases. If these are not available a standard ¼”
TS guitar cable can be used.
The output allows two Gemini cabinets to be linked
together in parallel to a single power amp channel.
Connect the output from the amplifier to the input
on the Gemini cabinet #1. Connect the output from
cabinet #1 to the input on cabinet #2. Again, either
Speakon or ¼” cables can be used.
Please note that in parallel configuration, the speakers
will present a 4 ohm impedance rather than the 8
ohm impedance of a single cabinet. It is important to
make sure that your power amplifier is designed to
operate with a 4 ohm load. Using parallel mode with
amplifiers not intended for use with 4 ohm speakers
can result in permanent damage to the amplifier and
speaker drivers. Double check this with your amplifier
manufacturer if you are not sure, before connecting
the Gemini 1-P in parallel mode.
WARNING It is not recommended to exceed two
cabinets connected in parallel mode. Connecting three
cabinets will present a 2 ohm impedance. Most amplifiers
are not intended to be used with 2 ohm speaker drivers,
and damage to the amplifier may result.
Mission Enginring Inc.
www.missionengineering.com
[email protected]
©Mission Engineering Inc. 2014. All rights reserved. GEMINI 1-P
is a Trademark of Mission Engineering Inc. Trademarks, registered
trademarks, product names, logos and other materials are the
property of their respective owners.
SAfy
Inruions
Read, Keep & Follow these instructions
Heed all warnings
Clean only with dry cloth
Do not use this apparatus near water
Do not expose the apparatus to dripping or
splashing and ensure that no objects filled with
liquids, shall be placed on the apparatus
 WARNING: To reduce the risk of fire or electric
shock do not expose this apparatus to rain or
moisture
Unplug this apparatus during lightning storms or
when unused for long periods of time
Do not block any ventilation openings. Install in
accordance with the manufacturer’s instructions
Only use attachments/accessories specified by
the manufacturer
Prolonged listening at high volume levels may
cause irreparable hearing loss and/or damage.
Always be sure to practice “safe listening.”
Refer all servicing to qualified service personnel.
Service 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 unit has been exposed to rain or moisture.
- the unit is dropped or the enclosure is
damaged
- the unit does not operate normally or changes
in performance in a significant way
Dismantling, rewiring, removing components or
otherwise altering the function of the unit may
cause unexpected behavior and will invalidate
the warranty.
MULti k
configuRAtion
Ecifitions
Power Handling 250W RMS
Frequency Response 66Hz - 20KHz +_ 2dB
Crossover Passive at 2.5KHz
Impedance 8 Ohm
Input Combo Speakon ¼” jack
Output Combo Speakon ¼” jack
dimEnsions
Width 24” (610mm)
Height 20” (508mm)
Depth 12” (305mm)
Weight 42lbs (19kg)
Gemini 1-P
#1
Gemini 1-P
#2
Gemini 1-P
#1
Gemini 1-P
#2
Modeler
2 Channel Power Amp 1 Channel Power Amp
Modeler
Stereo Mono (Parallel)
8 Ohm 8 Ohm 4Ohm
L R L+R summed (mono)