Gemini XPM-3000 manual Operating Instructions, Front Panel, Using the Amplifier Without Subwoofers

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.

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