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NHT SA-2 subwoofer amplifier in excellent conditionMintyThe NHT SA-2 is a dedicated 120-watt monaural subwoofer amplifier designed to power passive subwoofers (like the SW2Si) or the low-frequency sections of NHT tower speakers. It utilizes an energy-efficient Class-G design and provides clean, deep bass for home theater and audio systems. [1, 2, 3]Key Specifications & FeaturesPower Output: 120 watts RMS into 8 ohms; 165 watts into 4 ohms.Frequency Response: 25 Hz – 150 Hz (± 3 dB).Total Harmonic Distortion: Less than 0.03% at full power.Shipping to states in longitude of Colorado, farther west or rural parts of the Midwest will be a little more, billed separately
At US$165, this sits a bit above your US$150 median but well below the US$240 75th percentile, so it reads as a fair-to-solid buy rather than a bargain or an ambitious ask. It is close enough to the middle of the market that the price is reasonable if the unit is genuinely clean and fully working.
What makes it worthwhile is the kind of component this is: a dedicated subwoofer amplifier from a respected brand, which can be a very practical upgrade or replacement if you want to drive a passive sub properly. The “excellent condition” claim and 2000s-era build are positives if backed by a careful seller, and the upside is strongest if it includes the original controls/cables and has no hum, crackle, or protection issues.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
NHT, or Now Hear This, emerged in 1986 from the innovative minds of co-founders Chris Byrne and Ken Kantor, an MIT graduate renowned for inventing the AR Magic Speaker. Based in the United States, initially on the East Coast before relocating to Benicia, California, the brand quickly carved a niche with its psychoacoustically informed approach to loudspeaker design. After a self-imposed hiatus in 2009 amid industry shifts, NHT reemerged under employee ownership, free from corporate intermediaries, reaffirming its commitment to direct-to-consumer evolution.
The company's product focus remains sharply on loudspeakers, particularly acoustic suspension models that prioritize musicality, tight response, and application-specific performance over rigid price tiers. Iconic lines like the SuperZero mini-monitor exemplify this, delivering transparent midrange and balanced highs in compact bookshelf formats. NHT eschews diversification into amplifiers, turntables, DACs, headphones, or cables, instead channeling expertise into patented technologies that optimize sound for real-world listening environments.
NHT holds a respected mid-tier position in the hi-fi market, celebrated for high-value performance that punches above its weight and influences competitors. Its vintage models attract collectors, while current offerings appeal to discerning buyers seeking uncompromised acoustics without high-end premiums. Employee-owned and independent, NHT embodies boutique reliability for the knowledgeable audiophile prioritizing substance over hype.
See all NHT listings on RADAR.
