100W Full Frequency Mono Channel Digital Power Amplifier Audio Mini Amp (Full Frequency, Black)

This is a great little amp. I bought the full Freq version and a 24v 6amp power supply, have stereo Bluetooth as an input which is summed to a mono output by the amp. Output (banana plugs required) goes to two outdoor Yamaha wall mounted speakers wired in parallel (halves the speakers ohms) to give mono music (ideal for outside) all around the patio. Very powerful, very little, very impressed. Would buy a second one for another project in a heartbeat.

This is a reasonably competent module and importantly... it works. It should be pointed out that you need a DC power supply. Nobsound do one which is inexpensive or you may consider using a Buck inverter with either a battery pack or a DC power supply in excess of what the Nobsound module uses. In my situation I made a portable Om-nidirectional speaker with down firing subwoofer which this module powers well.

Good little piece of kit

If you open the case, you can change the Jumper shown by red arrow, to swap between the two, make sure unit is disconnected from power before you change jumper. Circuit is labelled for jumper. The full frequency amp is on definitely on the bright side of sound, sub doesn't seam to have a high enough low pass filter, it could do with going over 150 to 250 hz for more usability 👍 Recommend for full frequency mono to a crossover, or cinema sub, not music sub. Highly recommend 👍

Amplifier has a loud static hum and buzzing sound. Tried different speakers, different power supplies, and even with the source unplugged the static and buzz was loud. Really disappointing, waste of money.

My unit was very grubby inside, with lots of flux encrusted fingerprints, especially the larger components - some of which I suspect may be reclaimed. Ignoring the balls of solder loose inside the case, the quality of the through hole soldering is actually pretty decent though. Also for those wondering, as it isn't explicitly mentioned in the description, this amp (at least the full range version that I bought) DOES sum a stereo input.

Amazing and powerful small device, exactly what I was needing for my setup. The NS-03G-FR takes the 3.5mm aux input stereo signal and combines/sums both sides into a mono RCA output. Perfect if you want to use just 1 single full range speaker. Quite difficult to find a power supply with the right connector that fits, this way, I would recommend to purchase the power supply together.

They sent the subwoofer amp by mistake but even so, the performance was terrible and also noisy so I returned it. probably a faulty unit.