NX3000D Ultra-Lightweight 3000 Watt Class-D Power Amplifier with DSP Control and SmartSense Loudspeaker Impedance Compensation

Easy to use, super value, clean sound for my needs in the 250 watt range for 8 ohm speakers. I set it at about 70% volume and it has very little noise when nothing is playing and is crisp and clear when music is playing at high volume. Excellent choice for a home entertainment system. In regards to mobile systems, I would rate it as fine for use in a facility or studio in a mobile AV rack but it looks a bit delicate for touring and doesn't seem to deliver power in a range useful for commercial use as DJ but it might be great for someone talking to say 20-30 people in a conference room.

Using this to power an Ultimax 18-22 in a 15Hz tuned Marty-Type Slot-Port enclosure. Modded with Noctua fan, and power relay so my receiver can turn it on-off. Did have a ground-loop hum, but that was solved by running a wire from the chassis to the receiver Phono Ground post (typical problem when used for home-audio use). Used REW setup the DSP, worked really well once I figured out the interface which wasn't that difficult.

This powerhouse of an amp runs cool and quiet. I use it to drive my LFE channel. The DSP was easy to set up using the ap.

Pros: Works great and plenty of power for home theatre subwoofer(s), DSP is very easy to use over USB, and unit looks nice. Cons: Fan is far too loud for home theatre use. Unless your unit is in another room I would recommend replacing it with something like a Noctua. Display can’t be turned off and always glows orange. Unbalanced connections caused very noticeable buzz & hum even after isolating grounds. This however was solved by grounding a chassis screw on the amp to my A/V Receiver chassis with a piece of speaker wire and a ring terminals at either end. Not particularly pretty, but functional.

Peculiar title here on Amazon, but this is the NX3000D. I use this to power and integrate two mid-bass modules in a theater system. The DSP makes smooth integration possible due to being able to create high pass and low pass filters that are nominal for the speakers, enabling them to integrate smoothly with lower subs. The fan appears to be on at all times. It is a bit loud, but my AV cabinet is enclosed and ventilated...so it cannot be heard. Also have the NX6000D for low bass modules. The two enable excellent integration.

I bought a NX3000D but I didn't quite manage it to work like I wanted. Stereo mode its a little tricky and its different from others amplifiers, and the Instruction manual is terrible at explaining that part. There's no advanced manual, only Quick Start Guide, and It has like 5 different languages all mixed up in the same pages so it makes hard to understand it. It has a PC Windows application to change DSP configurations and other parameters but it doesn't quite work in windows 10. According to some users in avforum it is a common issue so you got to stick with the knobs settings. I changed like four different USB cables, and I tried three different PCS, tried connecting the usb first then turning on the amp, tried the other way around with no luck (It just stays offline forever). Fan NOISE is very loud, so this amp it's not suitable for listening to instrumental music or movies, only party music or so.

The NX3000 works as expected

Ive tried a quite a few different combos to power my two passive subwoofers for my main 2 channel listening system. They are a pair of REL HT12s that I got for cheap because the previous owner blew the amps in them. They are great sounding subwoofers. Over the years I have tried a bunch of Hifi two channel class A/B amps from Parasound, SAE, Denon, Yamaha all big heavy Hifi amps from the 80/90s many of which I recapped and restored to sell on to others. In combination with those amps I would run either a mini DSP or a Dayton LF DSP, I preferred the Dayton due to the cell phone app but sound wise they are identical when it comes to low frequencies/Bass. Maybe not for running main Left Right speakers but for subwoofers they sound the same. I was never really satisfied with the low end of my system though, I did get close with an old SAE A502 amp and the Dayton LF DSP. After some research I decided to give this thing a try. When I first got it and pulled it out of the box I was shocked at how light it was and I thought oh man this thing is going to suck what was I thinking. As soon as I got it, before I even hooked it up, I swapped the loud stock fan out for a Noctua NF-A8 PWM which you can get here on Amazon for cheap. You just connect the yellow wire from the Noctua fan to the red wire on the original fan plug and black to black and cap off the other two wires on the Noctua fan. Keep the original fan guard thing in there it helps keep it even quieter and helps cool it better as well. Anyway so I get it all back together and all setup in my system and the settings all dialed in similar to what I had found sounds good with the other DSP units and WOW. Like seriously.... WOW. This thing sounds amazing, much better than any of those other amps I had tried. I couldn't believe how this sounded that much better than a $1000 class A/B amp with dedicated DSP. That particular fan is super quiet, even a foot away you cant hear it at all. Cranking on this thing for a solid 30 mins straight the unit was not even warm to the touch. For the price, if you need something to power passive subs, I dont know how you could find anything better. Its cheap, keeps cool, the fan swap is stupid easy to do, the sound quality, for bass anyway, is truly great the bass is very tight, controlled, less compressed sounding, less boomy, more accurate, its amazing I am so glad I took a chance on this thing. The DSP has all the options you could ever need, so many different crossover types, Linkwitz, Butterworth, Bessel, 6, 12, 18, 24, and 48db. 8 band parametric that can be independent per side. Dynamic EQ, delay, limiter, which I dont ever use those but just basic crossover and a couple EQ settings is all that was needed for this thing to shine. My system contains a BAT VK-30 tube pre, Parasound A21 amp, Eversolo DMPA6 streamer/Dac, Nad C588 turntable, Musical Fidelity M6 Vinyl phono pre and an old Marantz 300 disc change going to the Eversolo DAC. Speakers are a custom 3 way I made with custom made crossovers for the drivers and enclosure. I feel like my system is finally complete now that the bass/low end is sorted and still blows my mind how this sub $300 piece of gear can sound so good and keep up with the rest of the setup.