BehringerNX3000D Power Amplifier with DSP

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.

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.

At first power up with no cables connected (not purchased or assembled yet), there was arcing inside seen through the front vent grill. After immediately shutting it down and checking that nothing could have happened externally, I tried it again for a couple seconds and no more sparks.So after building some cables and testing it out, it seems to drive the intended speaker ok, with no more arcing, but...I was planning to connect a series/parallel network of these 50W speakers to equivalent of 450 to 900W, but with only one connected and driven with this AMP at full power, it seems to be barely pushing 100W. My 140W receiver drives this single speaker much harder than this AMP does.Although I can't see any arcing damage or blown/burnt components inside, something must have limited the output on both channels.I guess a return is in order. Hopefully I can update this review with a happier ending soon!

Good product

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.

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.

The NX3000 works as expected

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.