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Nobsound Mini Mono Subwoofer Amplifier: 100W HiFi Amp with TPA3116 & Low-Pass Filter for Home Theater, Bass Shaker, Gaming, Subwoofer, Speaker (NS-21G)
Brand: Nobsound
Condition: Used
$4139
$5381
-24% Save $1242
Updated: 2 days ago
Description
100W TPA3116 Powerhouse: Features a robust Class D TPA3116 amplifier chip delivering 100W RMS (THD+N: 0.04%) for deep, clean bass reproduction—ideal for driving passive subwoofers and bass shakers with minimal distortion and maximum impact.
One-Knob Simplified Control: Easily power on and adjust the output level with a single knob. The NS-21G integrates volume and power into one smooth dial, giving you instant control over your subwoofer output level without altering your main system settings, ideal for movies, games, and music.
RCA & AUX Input Versatility: Connect seamlessly to TVs, gaming consoles, PCs, smartphones, or media players via dual RCA or 3.5mm AUX inputs—offers broad compatibility with virtually any home audio source for effortless setup.
NE5532 Op-Amp Clarity: Equipped with the audiophile-grade NE5532 operational amplifier for exceptionally clean, detailed bass signals; achieves ultra-low noise (SNR ≥103dB) and superior bass texture for immersive movies, music, and gameplay.
Durable Compact Metal Design: Built into a sturdy all-metal enclosure measuring just 3.54x4.13x1.18 inches (90x105x30mm); ensures reliable long-term performance while fitting discreetly on desks, shelves, or AV racks—perfect for space-conscious setups.
Warm tips:
Please connect only one input (RCA or AUX) at a time. Using both simultaneously may cause signal interference or mixing.
Parameters
Brand: Nobsound
Audio input: RCA / 3.5mm AUX
Audio output: Subwoofer out
Number of channel: Mono
Chip: TPA3116
Op-amp: NE5532
Rated output power: 100W
THD+N: 0.04%
SNR: ≥103dB
Bass cutoff frequency: 20–160Hz
RCA input sensitivity: 0.775V
Matched speaker impedance: 4–8Ω
Working voltage: DC 12–24V (5.5*2.5mm)
Dimensions (W*D*H): 90*105*30mm / 3.54*4.13*1.18in
Package dimensions (W*D*H): 205*180*55mm / 8.07*7.08*2.16in
Net weight: 325g / 0.72lb
Package weight: 700g / 1.54lb
Packing list
* 1* NS-21G Amplifier
* 1* DC 19V Power Adapter
* 1* User Manual
Please connect only one input (RCA or AUX) at a time. Using both simultaneously may cause signal interference or mixing.
Parameters
Brand: Nobsound
Audio input: RCA / 3.5mm AUX
Audio output: Subwoofer out
Number of channel: Mono
Chip: TPA3116
Op-amp: NE5532
Rated output power: 100W
THD+N: 0.04%
SNR: ≥103dB
Bass cutoff frequency: 20–160Hz
RCA input sensitivity: 0.775V
Matched speaker impedance: 4–8Ω
Working voltage: DC 12–24V (5.5*2.5mm)
Dimensions (W*D*H): 90*105*30mm / 3.54*4.13*1.18in
Package dimensions (W*D*H): 205*180*55mm / 8.07*7.08*2.16in
Net weight: 325g / 0.72lb
Package weight: 700g / 1.54lb
Packing list
* 1* NS-21G Amplifier
* 1* DC 19V Power Adapter
* 1* User Manual
Sold by
Amazon Warehouse
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- Backed by Amazon's A-to-Z Guarantee
- 30-day return policy
- Ships from Amazon fulfillment centers
- Price verified on Amazon
Product Details
- SKU:
- awhd-us-b0ff9ywxdw
- Model:
- SUC-NS-21G-AU
- Country:
- US
- ASIN:
- B0FF9YWXDW
Shopping Smarter
Common questions about buying open-box and refurbished.
Why buy refurbished or open-box?
Refurbished and open-box products offer the same performance as new at a fraction of the price. You're already saving $12 on this listing. They've been inspected, tested, and are ready to use — the only difference is the price tag. Buying refurbished also reduces electronic waste, extending product life cycles and keeping functional devices out of landfills.
What's the difference between open-box and refurbished?
Open-box products are customer returns that have been inspected and confirmed functional. They may show little to no use — often the item was returned simply because the buyer changed their mind. Refurbished products have been professionally repaired or restored by technicians, tested to meet or exceed manufacturer specifications, and sometimes come with a warranty. Both are a smart alternative to buying new.
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