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X2 Active Crossover
Design
The NHT X2 active crossover is designed to provide convenient front-panel adjustment of the controls
necessary to integrate one or two subwoofer(s) with a Left and Right satellite speaker or to biamp a
3-way tower loudspeaker. The unit has unbalanced RCA and balanced XLR inputs and outputs for
connection with all types of receivers or separate audio components.
The X2 active crossover can operate as either a mono (single channel) or stereo unit (dual channel).
In the stereo mode, you may add an additional subwoofer without purchasing an additional crossover.
Two subwoofers can be used for stereo bass (which is desirable for music reproduction) or for addi-
tional mono bass reinforcement (for movie soundtracks).
Note: Do not use both the unbalanced (RCA) and balanced (XLR) inputs at the same time. The unbal-
anced (RCA) and balanced (XLR) outputs are buffered separately and may be used simultaneously.
Placement
The X2 crossover may be used on a shelf, or in a standard 19" equipment rack using the optional rack
ears and hardware. See section 10.3 for instructions on rack mounting the X2.
Ideally, the X2 should be placed in close proximity to the receiver or surround processor. Minimizing
wire lengths reduces the chance of noise contamination. If long runs (more than 20 feet) of signal wire
are required, we recommend using the balanced (XLR) inputs and outputs on the crossover.
If you are using the X2 in combination with an NHT A1 amplifier, we recommend that you place the X2
underneath the A1 amplifier. Or, in a stereo configuration, place the X2 between two A1 amplifiers.
The A1's are equipped with lamps under the front edge, which illuminate the X2 controls. See section
9.2 for more detail.
X2 Features and Controls
This section describes the various controls and functions of the X2. Make sure that your X2 controls
are initially set as described in Section 7 before continuing.
Power/Standby Mode (Rear Panel)
Your X2 crossover does not have a power switch, but has been designed with the
ability to turn itself on and off under various conditions. There are three methods
for triggering the X2.