Nobsound NS-21G Monoblock Amplifier, 100W, High-Efficiency TPA3116 Chip, Compact HiFi Subwoofer Amplifier with Bass Shaker, RCAAUX Input, Adjustable

High-Density 100W Power & Clear Bass Reproduction > This mono-channel amplifier packs 100W of power into a compact housing. It uses the TI TPA3116 Class D chip, achieving over 85% energy conversion efficiency. It reproduces powerful low frequencies, ideal for passive subwoofers and bass shakers. > Technical Basis: Compatible with 4-8Ω speaker loads, its low distortion (THD+N) of 0.04% ensures distortion-free bass in home theater and gaming environments. The metal housing's heat dissipation design ensures stable operation even during extended periods of continuous use. Its compact design (90x105x30mm) allows it to be installed in the narrow spaces around a desktop PC or AV rack, yet delivers deep bass that lets you physically experience movie explosions and music basslines. Dual Input Support & Multi-Device Connectivity > Equipped with dual RCA/3.5mm AUX inputs. Direct connection to a variety of audio sources, including TVs, PCs, smartphones, and game consoles. > Expanded Practicality: The simple design eliminates the need for an input selector switch, so only one input needs to be connected at a time (using multiple inputs simultaneously risks crosstalk). Combined with the included 19V power adapter (5.5mm x 2.5mm jack), instant setup is possible even in limited spaces, such as behind an LCD TV or at the foot of a desktop PC. Wireless connectivity is also possible by connecting a Bluetooth receiver via AUX. Precision variable low-pass filter (20-160Hz) > Bass cutoff function with spin knob adjustable between 20Hz and 160Hz, preventing overlap between main speakers and subwoofer. > Acoustic optimization: filter slope characteristic of 12dB/octave. Optimize crossover points for different content types—set it to 80Hz for clear bass definition when playing music, or lower it to 40Hz for movies to emphasize rumble-like infrasonics. Designed with phase matching to the main speakers in mind, it ensures seamless bass integration with an indistinguishable bass position. Equipped with NE5532 Op Amp & High-Quality Signal Processing > The input stage uses the classic NE5532 op amp, with over 40 years of experience in the audio industry. > Noise suppression technology: A high SNR (signal-to-noise ratio) of 103dB suppresses hum during periods of silence. Optimized for standard line-output levels with an input sensitivity of 0.775V, it operates reliably with everything from smartphone headphone outputs to professional audio interfaces. Tonal distortion, particularly in the ultra-low range below 80Hz, is reduced, faithfully reproducing even the subtlest nuances of electronic instrument synth bass and movie soundtracks. All-weather metal enclosure & flexible installation > The 1.18mm thick metal enclosure shields against electromagnetic interference (EMI) and adds rigidity to the lightweight 325g body. > Durable design: The heat-conducting metal base plate prevents thermal runaway within the rated power range. Supports a wide input voltage range of 12-24V DC, allowing use with car or portable power sources. Provides a versatile bass boost solution for a variety of situations, including attaching a bass shaker to a gaming chair, enhancing the sound of a flat-screen TV, or building a compact audio system for your study.