X2 Active Crossover OWNER’S MANUAL Now Hear This 6400 Goodyear Road Benicia, CA 94510 800-NHT-9993
Specifications X2 Active Crossover Frequency response: 15Hz - 220Hz +/-3dB through L/R input (continuously variable) 15 - 220Hz +/-3dB through LFE input (fixed) 50, 80, 110Hz-100KHz +/-3dB Distortion: < 0.01% subwoofer output @ 100Hz, 1V < 0.
Block Diagram and Schematic Below is a block diagram of the X2 crossover. This may be useful when integrating the X2 into your system. A schematic of the X2 is available on our website at www.nhthifi.com. This may be useful if you wish to modify any of the filter characteristics in the X2. This is only recommended for users with the correct technical training and will completely void your warranty.
Tower With Stereo Subwoofers AV Receiver or Surround Processor Line Output L Subwoofer Output R (Optional) X2 Amplifier Amplifier Speaker Outputs Line Input - + Line Input - + - + High Tower L Tower R + - Low + Low Amplifier Speaker Outputs - + Line Input High - Amplifier Speaker Outputs Speaker Outputs - + Line Input +
Tower With Mono Subwoofers AV Receiver or Surround Processor Line Output Subwoofer Output L R (Optional) X2 Amplifier Amplifier Speaker Outputs Line Input - + Line Input - + - + High Tower L Tower R + - Low Speaker Outputs - + Line Input High - Amplifier Speaker Outputs + Low +
Satellite Subwoofer Systems The X2 can be used to crossover a mono or stereo subwoofer to a stereo satellite system as long as the desired crossover frequency falls into the 50 to 200Hz range. If using a mono subwoofer, three channels of amplification will be needed. If using a stereo subwoofer system, four channels of amplification will be needed. See the following diagram for the proper system wiring when biamplifying with an X2.
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).
On the rear panel of the X2 is a 3-position switch that determines the trigger mode: 1) On; the X2 is always on. 2) Audio; the X2 will automatically turn on when it detects an audio signal and turn off after 20 minutes with no signal. 3) 12V Ext; the X2 is remotely turned on when it detects a DC control signal from another component in your system. The external trigger accepts 5 - 24 volt (DC) signals. For more information regarding external triggers, consult your authorized dealer.
High Pass Filter Switch (Rear Panel) The High Pass Filter determines the range of frequencies that the main speakers ("satellites") will reproduce. For example, a high pass setting of 80Hz means that the main speakers receive a signal containing only frequencies above 80Hz. The 3-positon High Pass Filter is selectable between 50Hz, 80Hz, and 110Hz to accommodate a variety of speaker sizes. Set the High Pass Filter to a frequency above the rated low frequency limit of the main speakers.
Gain Switch (Rear Panel) The Subwoofer Gain switch allows you to increase the gain of the X2 subwoofer output by 10dB. Normally, the factory default "0" position will give you a wide range of volume adjustment. However, if the sensitivity of your satellite speakers is greater than 93dB, your range of volume adjustment on the X2 may be limited. In this case, set the Gain Switch to 10dB.
System Status Indicators (Front Panel) Located on the right hand side of the front panel are two LEDs. They are used to indicate the functional status of the X2 Crossover. P - Power LED (green) - indicates the X2 is on and in a ready condition. S - Standby LED (amber) - indicates the X2 crossover is in "standby" mode. 8.5 Fine Tuning Chart The chart below was developed to assist you in the further fine tuning of your subwoofer or tower system.
Limited Warranty Valid Only in the U.S.A.
