Gemini X-03 Power Amplifier User Manual

2.With the power off, connect your input cables to the CHANNEL 1 and 2 inputs using the 1/4" (1, 2,) or XLR (3, 4) INPUT JACKS of each channel.

3.Connect the loudspeakers to the CHANNEL 1 and CHANNEL 2 SPEAKER OUTPUTS (10, 12, or 13, 14). THE TOTAL SPEAKER LOAD MUST BE AT LEAST 4 OHMS PER CHANNEL. If you try to operate at a lower impedance, the amplifier will go into protection mode and stop operation until you correct the load conditions.

4.With the LEVEL CONTROLS (20. 21) of both channels set to zero (fully counterclockwise), turn the POWER SWITCH (15) 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. Note, when the CLIP LED (19) light, there is distortion present in the amplifier’s output section. If a CLIP LED (19) 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.

5.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.

PARALLEL MONO OPERATION:

Follow these instructions for PARALLEL MONO operation using a single input cable, and you will have the same monophonic signal on both the CHANNEL 1 and the CHANNEL 2 outputs. Each channel’s output is controlled independently by that channel’s level control.

1.With the power OFF, set the OPERATION MODE SWITCH (5) to the PARALLEL MONO position.

2.With the power OFF, connect your input cables to the CHANNEL 1 input only using the INPUT JACK, 1/4" (1) or XLR (3) of CHANNEL 1.

3.Connect the loudspeakers to the CHANNEL 1 and CHANNEL 2 SPEAKER OUTPUTS (10, 12). THE TOTAL SPEAKER LOAD MUST BE AT LEAST 4 OHMS PER CHANNEL. If you try to operate at less than 4 Ohms per channel, the amplifier will go into the protection mode and stop operation until you correct the load conditions.

MONO BRIDGE OPERATION:

Follow these instructions to bridge the unit’s output. Bridging the amplifier converts the unit to a monophonic or single channel amplifier. The amplifier can be used with 8 Ohm or higher loads only in MONO BRIDGE mode. This mode is used to provide a higher voltage with greater headroom to your speaker. Before setting your amplifier for MONO BRIDGE operation, make sure that your speaker can handle the high power level provided by the amplifier in MONO BRIDGE mode.

CAUTION: VOLTAGE OVER 100 VOLTS MAY BE PRODUCED AT THE BRIDGE OUTPUT TERMINALS IN THIS MODE.

1.With the power off, set the OPERATION MODE SWITCH (5) to the BRIDGE position.

2.With the power off, connect your input cables to CHANNEL 1 input only using the INPUT JACK, 1/4" (1) or XLR (3) of CHANNEL 1.

3.Connect the loudspeaker to the BRIDGE SPEAKER OUTPUT (11) only. Be sure the polarity of your connection is correct. The total speaker load must be at least 8 Ohms or above. If you try to operate at less than 8 Ohms in the MONO BRIDGE mode, the amplifier will go into the protection mode and stop operation until you correct the load conditions.

4.With the CHANNEL 1 LEVEL CONTROL (20) set to zero (fully counterclockwise), turn the POWER SWITCH (15) ON. With the level controls of your MIXER or other INPUT device turned all the way DOWN, turn the amplifier level control all the way up for desired loudness from your speakers. Note, when the CLIP LED (19) light, there is distortion present in the amplifier’s output section. If a CLIP LED (19) 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 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 GROUND LIFT SWITCH (6) in the left position).

2.Turn the power off before moving the GROUND LIFT SWITCH (6). Lift the ground by moving the GROUND LIFT SWITCH (6) to the right, turn the power back on and listen to determine which position will provide a signal free of background noise and hum. Keep the GROUND LIFT SWITCH (6) 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:

	X-01	X-02	X-03	X-04
Output Power EIA:			1kHz @ 1% THD, Wrms
Both Channels Driven 8Ω 85		140	200	200
Both Channels Driven 4Ω 110		200	300	300
Mono Bridge 8Ω	220	400	600	600
Dynamic Headroom, dB:
At8Ω	1.4	1.5	1.6	1.6
At4Ω	1.9	2.0	2.2	2.2
Frequency Response				30 Hz - 50 kHz
Total Harmonic Distortion	Iess than 0.05%, typical 0.02% @ 1 kHz
Signal to Noise ratio		100 dB below rated power @ 8Ω
Damping factor			greater than 200 @ 8Ω
Slew rate				20 V/µS
Voltage gain, dB	28	30	32	32
Input Sensitivity (for rated power at 8Ω)				1 Vrms
Input Impedance Unbalanced				10 kW
Input Impedance Balanced				20 kW
Power consumption, W	500	800	1200	1200
(at rated power at 4Ω, both channels driven)
AC Power Requirements	110-120 V / 60 Hz and 220-240 V / 50 Hz
Indicators:				1 Power LED
...............................................................................................				1 Protect LED
........................................1 Signal LED per Channel (for X-01, X-02, X-03)
..............................................................		1VU-meter per Channel (for X-04)
Cooling		Fan, Front-to-Rear Forced Air
Protection:		Short Circuit, DC, Thermal Cut-off,
...............................................................		Sub/Ultrasonic Frequency Filters,
.......................................Turn-on Delay, Main Fuse, Secondary DC Fuses
Connectors:
Balanced/Unbalanced lnputs				1/4" Jacks, XLR
Speaker Outputs		3-Way Binding Posts, 1/4" Jacks
Dimensions:
X-01, X-02, X-03	19"W x 10.75"D x 3.5"H (483 x 273 x 89 mm)
X-04	19"W x 10.75"D x 5.25"H (483 x 273 x 133 mm)
Weight	16.3 Ibs	17.8 Ibs	20.2 Ibs	21.6 Ibs
	7.4 kg	8.1 kg	9.2 kg	9.8 kg

SPECIFICATIONS AND DESIGN ARE SUBJECT TO CHANGE WITHOUT NOTICE FOR PURPOSE OF IMPROVEMENT.

IN THE USA: IFYOU EXPERIENCE PROBLEMS WITH THIS UNIT,PLEASECALL1 (732) 738-9003 FOR GEMINI CUSTOMER SERVICE. DO NOTATTEMPT TO RETURN THIS EQUIPMENT TO YOUR DEALER.

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X-01, X-02, X-03 specifications

The Gemini program, initiated by NASA in the early 1960s, was a groundbreaking series of space missions that paved the way for human exploration of space, particularly the Apollo missions that followed. Three notable spacecraft from this program were Gemini X-03, X-02, and X-01, each contributing significantly to space technology and astronaut capabilities.

Gemini X-03, launched on January 24, 1966, was notable for its advanced mission objectives, including the first dual rendezvous in space. It facilitated the docking of two spacecraft, a critical step in future missions that required astronauts to transfer between vehicles. The spacecraft was equipped with a sophisticated inertial guidance system that ensured precision in orbital maneuvers. Gemini X-03 utilized multiple control systems, including thrust vector control, which enhanced its maneuverability during docking procedures. The mission's success provided invaluable data on orbital mechanics and laid the groundwork for more complex missions to come.

Gemini X-02 followed with a launch on June 3, 1966. This mission's primary focus was on long-duration flights, allowing astronauts to test new life support systems and evaluate human endurance in space. The X-02 carried a variety of experiments designed to assess the physical and psychological impacts of space travel on crew members. Among its key technologies were advanced environmental control systems that integrated air purification and temperature regulation to maintain optimal living conditions within the spacecraft. The lessons learned from Gemini X-02 directly influenced designs of subsequent space vehicles, notably those used in the Apollo program.

Gemini X-01, launched earlier on March 23, 1966, was the inaugural mission in this series, marking the first time astronauts occupied the Gemini spacecraft. Its primary aim was to demonstrate the capabilities of the system in low Earth orbit and validate the technologies developed for future missions. The X-01 included cutting-edge navigation systems that improved spacecraft orientation and trajectory tracking. The mission was a test bed for many systems that would later be crucial for deep-space missions, including telemetry, communication, and astronaut health monitoring.

Together, Gemini X-03, X-02, and X-01 showcased the evolution of space travel technologies during the 1960s. Each mission built upon the successes and lessons of its predecessors, leading to significant advancements in spacecraft design, astronaut training, and mission planning. The Gemini program ultimately set the stage for safe and effective human exploration beyond Earth's atmosphere, exemplifying the spirit of innovation and determination that characterized early space exploration efforts.

Gemini Ultimate Guide to Using Your Power Amplifier for Superior Performance

Models: X-01 X-02 X-03

PARALLEL MONO OPERATION:

MONO BRIDGE OPERATION:

USING THE GROUND LIFT SWITCH:

SPECIFICATIONS:

220

400

600

500

800

1200

X-01, X-02, X-03 specifications