Multiple Subwoofer Configurations: Using two SW2Si subwoofers
While the addition of a powered subwoofer system results in significant improvements to an audio or home theater system, there are some potential drawbacks to the use of a single subwoofer in certain rooms. A single subwoofer tends to excite the resonant frequen- cies of a room, inevitably causing peaks and dips in the room response within a certain range of low frequencies.
To help counteract some inherent low frequency colorations, it can be advantageous to employ multiple subwoofers placed assymetri- cally in the room. When two subwoofers are used together and are set up properly with respect to phase and level, they tend to smooth out peaks and dips, for a flatter overall low frequency response, increased articulation and clarity.
The
Dual Subwoofer Connection Method
To run two SW2Si subwoofers from a single
1) Using two similar lengths of speaker cable, connect the positive (red) conductors of both cables to the positive (red) SUBWOOFER OUTPUT terminal on the
2) Connect one speaker cable to the first subwoofer (positive conductor to positive terminal, negative conductor to negative terminal).
3) Connect the second speaker cable to the second subwoofer, wired in the same fashion.
The SA-2 and Biamplification
All NHT tower loudspeakers are designed with dual sets of binding posts to allow for biamplification. Biamplification is the use of two sep- arate amplifiers, one to power the low frequency (subwoofer) drivers and one to power the upper frequency (midrange / tweeter) drivers.
The advantages of biamplification include reduced distortion, increased dynamic range and power output. Since both amplifiers are spared the task of reproducing the entire frequency range, both are able to concentrate all their headroom toward a specific frequency range. In the event that the speakers are driven to elevated listening levels, the subwoofer amplifier may clip first, but this distortion will be isolated from the upper frequency ranges because they are amplified separately.
Biamplifying tower speakers with the
Towers may be biamplified monaurally using a single
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