Nobsound NS-15G TPA3116 Amplifier 100W+100W Review

The Nobsound NS-15G is a mini Bluetooth digital amplifier priced at $49.99, built for desktop or small-space systems at 92 x 108 x 30mm and 320g. It accepts a Bluetooth 5.0 signal or a wired stereo RCA input and outputs to banana speaker jacks.

At the core are two TPA3116D2 chips, the workhorses of modern mini Class D amps, rated for a maximum output of 100W+100W above 24V at 8A into 4 ohm, plenty to drive the 200W (8 ohm) or 300W (4 ohm) speakers Douk Audio names, with 4-8 ohm output impedance and a match range of 3-10 inch, 20-200W speakers. Rated performance includes THD of 0.01% or less, SNR of 98dB or better, 18Hz-25kHz frequency range and 1.1V input sensitivity. The Bluetooth 5.0 input supports up to a 50ft connection range, stable and low-delay.

The front panel keeps things tactile: treble and bass knobs span plus or minus 10dB for rousing highs and deep lows, and a bypass function returns the original untouched sound. An AUX / Bluetooth switch with red and blue indicators shows the active input at a glance. The case is pure integrated aluminum with multi-process finishing and CNC precision cutting, its curved smooth edges highlighting the unibody design, finished with a metal DC outlet that avoids electric sparks when connecting power.

The NS-15G runs on DC 12V-24V, and the variant options include a 19V power supply. Worth knowing: the headline 100W+100W rating is quoted above 24V at 8A, so the included 19V adapter will not extract the full figure. Complete protection circuits guard the amp in daily use.

Specifications

How it compares

The closest match is the Nobsound NS-13G 2.0 Channel Amplifier 100W+100W review ($54.99): the same two TPA3116D2 chips, the same 100W+100W rating above 24V at 8A into 4 ohm, the same plus or minus 10dB tone control with bypass and the same 3-10 inch, 20-200W speaker match. The NS-13G page lists stereo RCA as its only input, so the NS-15G is the one to take if you want Bluetooth, and it is $5.00 cheaper. The NS-13G is a little slimmer at 82 x 108 x 27mm and 260g, against 92 x 108 x 30mm and 320g here.

The Nobsound NS-04G PRO Stereo Amplifier 100W x 2 review also pairs two TPA3116D2 chips for 100W+100W and takes RCA only. Its page lists a volume knob and no tone controls, and it prints an SNR of 118dB or better, 20dB above the 98dB on this page, with no conditions behind either figure. If you want a wired amp with a bare front panel, look there; if you want tone knobs and Bluetooth in one box, the NS-15G fits better. For a smaller and cheaper first Bluetooth amp, the Nobsound NS-01G MAX Amplifier 100W+100W review ($39.99) measures 78 x 70 x 23mm, but its page gives 30W+30W with the supplied 19V adapter and a 3.5mm AUX input (an AUX-to-RCA cable is in the box) rather than RCA jacks, so it suits bookshelf speakers on a desk rather than the larger speakers the NS-15G page describes.

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.