Gemini XPM-3000 manual Specifications, Using the Signal Ground Lift Switch

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

Output Power EIA: 1kHz @ 1% THD (100 Hz @ 1% THD for the subwoofer channel)

Ouput Power Chart: Subwoofers

	Impedance	Not	8 Ohms	4 Ohms	2 Ohms
		Used
	Not Used		260	425	600
A and B
	8 Ohms		220	380	540
Speakers		220	200	190	165
	4 Ohms			350	530
		300		270	250

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

Damping Factor:
Channels A and B	>300 @ 8 Ohms
Subwoofer Channel	>600 @ 8 Ohms
Slew Rate	25 V/∝S
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 @ 8Ohms
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.

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