Nobsound NS-13G 2.0 Channel Amplifier 100W+100W Review

The Nobsound NS-13G is a mini 2.0-channel digital amplifier priced at $54.99, made for home and desktop audio systems at 82 x 108 x 27mm and 260g. It is the wired sibling of Nobsound's Bluetooth amps: instead of wireless inputs, it keeps things simple with a stereo RCA input and banana speaker jacks.

The power section uses two TPA3116D2 chips for a maximum output of 100W+100W, quoted above 24V at 8A into 4 ohm, which Douk Audio says drives the 200W (8 ohm) or 300W (4 ohm) speakers it specifies with no pop or audible noise. The matched speaker window is 3-10 inch, 20-200W at 4-8 ohm. Rated performance includes 18Hz-25kHz frequency range, THD of 0.01% or less, SNR of 98dB or better and 1.1V input sensitivity.

The tone section offers treble and bass knobs spanning plus or minus 10dB, so you can add rousing highs and deep lows, with a bypass function that returns the untouched original sound at a touch. The case is a customized gray aluminum chassis with multi-process fine treatment and CNC precision cutting, while the unique knurling on the volume knob gives it a strong metal feel. A metal DC outlet avoids electric sparks when connecting power.

The NS-13G runs on DC 12V-24V, and the variant options include a 19V/4.74A power supply in the box. One honest caveat: the maximum output figure assumes a larger supply than the bundled 19V unit, so the practical output on the included adapter will be lower than the rated maximum. The package contains the amplifier, the 19V power supply and a manual.

Specifications

How it compares

The NS-13G costs $54.99 without an adapter and $64.99 with the 19V/4.74A one. That is $5.00 more than the Nobsound NS-15G in both versions ($49.99 and $59.99), whose page lists the same two TPA3116D2 chips, the same 100W+100W headline above 24V at 8A into 4Ω, ±10dB tone controls with bypass, THD 0.01% or less and SNR 98dB or better. The NS-15G adds Bluetooth 5.0 and an AUX/Bluetooth switch in a slightly larger case (92 x 108 x 30mm and 320g, against 82 x 108 x 27mm and 260g), so the NS-13G is the smaller, wired-only version rather than a cheaper one. The Nobsound NS-04G PRO lists $46.99 without an adapter and $56.99 with one: two TPA3116D2 chips at 100W+100W into 4Ω, a volume knob and an RCA input with a preamp stage, but no tone controls. The Nobsound NS-06G ($42.99, adapter in the box) is a 60W x 2 TPA3116 amp with a listed THD+N of 0.04%.

Who it suits: the NS-13G fits a wired desk or small-room setup with 3-10 inch speakers that wants tone controls and bypass in the smallest of these four cases. The NS-15G fits the same setup with Bluetooth for $5.00 less, the NS-04G PRO fits a low-output source that needs a preamp stage, and the NS-06G fits a plain RCA setup with the adapter included.

Shipping, returns and warranty

• Shipping: Douk Audio's current shipping page says orders are generally processed no later than the next business day and arrive in 2-8 business days, with duties, taxes and customs fees included in the checkout price unless noted otherwise.
• Older shipping terms are still online: airmail at 10-25 days for parcels under 2 kg, DHL, UPS or FedEx at 5-8 days above that, and a line saying the store is not responsible for import duties. Check the delivery estimate and any duties at checkout.
• Returns: ask within 30 days of delivery and wait for approval before sending anything; an approved return has to ship within 7 days. Items need all packaging and accessories and no excessive wear, or the store can refuse them or refund part of the price. Refunds go to the original payment method after inspection.
• Not refunded: original and expedited shipping, duties, taxes and customs charges, unless the law requires it or the store made the error. The return page does not say who pays return postage, and the older refund page excludes mistaken orders and change-of-mind returns from free after-sale service.
• Warranty: 24 months from purchase for manufacturing defects, with free repair, a replacement unit and free shipping both ways for covered repairs. Drops, liquid, DIY repairs, lightning, extreme temperatures and misuse are excluded (partial fees may apply), and damage from weak packing on the way back may not be covered. The older refund page still says 1 year.
• Seller: the site is run by Shenzhen Anba Technology Co., Ltd (Shenzhen, China) and HONGKONG LONGSHENG Import and Export Trading Co., Limited (Hong Kong); support is by email at [email protected]. These terms cover orders placed on doukaudio.com; other sellers apply their own.

For this product, the page lists US, UK, EU, AU and Other under SHIPPING TO and shows Free Shipping, 2-8 Days Arrival, 30-Day Return and 2-Year Warranty badges near the price.