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Design
NHT products are designed to deliver refined, musical sound from attractive and affordable packages. Our
efforts are guided by the study of human hearing and are optimized for real-world use. Every NHT product
undergoes rigorous testing and quality control at the factory to ensure you years of listening pleasure.
The NHT SA-2 Subwoofer Amplifier is a powerful and versatile monaural low frequency amplifier. The SA-2 and
SW2Si passive subwoofer together comprise the SW2Pi Powered Subwoofer System. Additionally, the SA-2 is
designed to power the subwoofer sections of NHT tower speakers when connected in biamplified configu-
rations.
The SA-2 is optimized for powerful low frequency reproduction, with a host of convenience features and
sufficient high output capability to drive up to two subwoofers. Its discrete Class G design enables cooler
operating temperatures, employing a massive power transformer and dual-rail power supplies for high output
and low distortion. Only high-precision, low-noise componentry is used in the crossover circuits, for seamless
blending with any loudspeaker.
Placement
The SA-2 amplifier’s stand-alone design allows it to be placed either with other electronic components in the
system or on top of the SW2Si subwoofer enclosure.
Note: To prevent the SA-2 amplifier from overheating, always be sure to provide adequate space for
proper ventilation.
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SA-2 Amplifier Specifications
· System Type: Monaural Class G subwoofer amplifier
· Power Output: 120 watts RMS into 8 ohms, 165 watts into 4 ohms
· Frequency Response: 25Hz - 150Hz +/-3dB
· Distortion: Less than 0.03% at full power
· Crossover: Low-pass continuously variable between 35-150Hz, 18dB/octave
Selectable high-pass at 50, 75, and 110Hz, 12dB/octave (line-level)
Fixed high-pass at 100Hz (8 ohms), 6dB/octave (high-level)
· Input Connectors: Gold plated RCA jacks for line level input
Gold plated barrier strip for speaker level input
· Output Connectors: Gold plated RCA jacks for line level output
Gold plated barrier strip for speaker level output
Gold plated 5-way binding posts for subwoofer output
· Phase Control: 2 position selectable at 0 and 180 degrees
· Standby Mode: (defeatable) Automatically shuts off when no signal is present for 10 minutes
· Weight: 15 lbs.
· Dimensions: 3.75"H x 16"W x 10.75"D
· Finish: Black anodized front panel, black painted chassis