Overview:

The X1 Active Crossover is the control center for Evolution subwoofers and tower bass modules (Note: The X1 contains special equalization circuitry specifically designed for Evolution subwoofers and tower bass modules only. Do not use with non-Evolution subwoofers. For non-Evolution subwoofers or the bass section of tower speakers see the X2.) It provides extensive front-panel control of all the bass frequency parameters necessary to integrate Evolution subwoofers with Evolution monitors or other satellites, and assists in tuning your system to your listening room.

The X1 can operate as either a single channel (mono) or two-channel (stereo) unit via a switch located on the rear panel. Operating the X1 in stereo mode allows the addition of a second subwoofer, for greater bass reinforcement without the expense of an additional crossover, or for stereo bass when using the T5 tower or U2 subwoofer. Controls and features are found on both the front and rear panels. The X1 can also be rackmounted using the NHT E1 optional rack mounting kit.

Rear Panel Controls

Two sets of inputs and outputs on the rear panel of the X1 -- differential XLR balanced as well as unbalanced RCA connections -- for easy hookup with all types of receivers, preamplifiers and surround processors.

Inputs: Left & Right, LFE. Outputs: Left & Right, LFE

3-position, high-pass filter switch (50Hz, 80Hz, 110Hz) controls your monitors' low frequency cutoff. The subwoofer output gain switch allows either 0dB or +10dB settings.

The X1 offers a variety of power mode options; always on, 5-24v DC trigger, or auto-on/off mode responding to audio signals.

Front Panel Controls

Master gain adjusts overall level to the subwoofer outputs.

Two phase controls; 0-180 degree switch, continuously variable control allowing fine adjustment of phase between 0-90 degrees.

Continuously variable low-pass filter for integrating the subwoofer with the monitors. Separate LFE gain control.

Boundary control, which compensates for the proximity of room boundaries and allows flat, even response.