Nobsound NS-04G PRO Mini Stereo Amplifier 100W x 2 Review

The Nobsound NS-04G PRO is a mini stereo power amplifier priced at $56.99, and the listing describes it as the latest updated version with a simplified circuit, upgraded components and better sound quality. It is a two-channel, class-D design for home and desktop systems.

Each channel uses a TPA3116D2 integrated circuit, giving a maximum output power of 100W + 100W into a 4Ω load, enough in the maker's words to drive home bookshelf, computer, desktop, floor-standing and outdoor passive speakers. The only audio input is a standard stereo L/R RCA connection, but there is a built-in preamplification circuit, so sources with low output levels can still drive the amplifier properly. The speaker terminals use a staggered design for more space and easier connection, and read as 4-8Ω loads.

Measured performance is quoted at THD of 0.01% or less and SNR of at least 118dB, with a 20Hz-20kHz (±1dB) frequency response and input sensitivity of 280mV or below. The maker highlights reasonable circuit layout, concise wiring, protection against sparks and shocks, and smooth, natural sound with strong low frequency and delicate high frequency. The aluminium case is black, measuring 87 x 108 x 35mm and weighing 290g, and it runs from DC 12V-24V with a 19V supply available as an optional extra. The package contains the amplifier, a user manual and the power supply if the bundled version is chosen.

Douk Audio ships worldwide with free and expedited options and country-dependent pricing. Orders under 2kg go by airmail (10-25 days) and orders over 2kg by DHL, UPS or FedEx (5-8 days); the 290g amplifier travels by airmail. Import duties and customs charges are the buyer's responsibility. All items come with a 30-day free return or full refund and a 1-year warranty, excluding orders placed by mistake, man-made damage or misuse, a subjective change of mind, and anything else outside the warranty terms.