B2 Audio 4v 10 Channel DSP with Bluetooth iOS/Android App 96 KHz - 32 Bit

This 6 input in and 10 inputs out is amazing and not just for the price. If I upgrade 4 channel amp and add more speakers I’m basically set with this DSP. The app is easy to use but does require for you to enter password every time you connect it. When getting out of the app and returning to the app. It creates white bars on the sides of the app and you can’t see some of the menus on IOS phones. Setting EQ for individual channels, Gain, Delay and crossovers is super easy. Comes with no instructions but just watch some YouTube videos and you’ll see how easy it is. I feel like everyone complaining is just tech challenged, phone challenged or have sausage fingers. There is nothing complicated about this user interface. That there are better options is not the point. Because they also cost a lot more. So for this price point if feels like it’s a steal as long as your not smartphone challenged.

Solid dsp. No distortion noticed yet, no popping on start up. Definitely a lot of bang for your buck with this little guy, 6 in 10 out is great. With the app it's simple to configure and pretty straight forward. Hardware wise looks solid but the 12v,S,ground terminal could be a little more solid. Its nice the bluetooth antenna is removable as I had a extension flat antenna from an old headunit that I ran to the front of my cab, though I probably didn't need to. The app is fine. Works best in landscape but will work in portrait mode, but kinda crams everything together. Only reason I bring it up is my andriod headunit is in portrait mode and that's where I config the app. But worse comes to worse I can use my phone. Toslink in would be a great addition to the next version but rca is fine. Thank you B2, solid DSP you guys have here.

Performance wise this is great. However, a few cons: 1- no real instructions or help out there. Routing is kinda confusing. Sounds great, just no idea really if they're set properly. This is only my 2nd dsp, upgraded from my prv. 2- not thrilled with the bluetooth. Seems to work ok, just a pain having to always login and enter password, every time! Also saving a profile is not great. You actually have to type the profile name each time instead of just clicking on an already saved profile. Yes, eventually your phone will remember after typing the 1st letter or 2, but still, could be simpler. 3-dont make the voltage readout on the app your only monitor. Mine seems to be quite inaccurate, reading 14.3 when everywhere else is close to 15. 4- the connection block is kinda chintsy. It works, just could and should be better. All that being said, still only took off 1 star. The unit is awesome as is using the app as opposed to the stupid dial on prv. The eq is insane! 31 bands for each channel and awesome to adjust. Really fun, the crossover too. Time alignment is great also. No idea what the noise gate does. Definitely room for improvement, but I'm absolutely keeping it. Only had it installed about a week now. Also the small size is nice, fit in glove compartment. However, does seem to get hot. Fortunately I had a small fan collecting dust I was glad to be able to use. Bottom line, if you're thinking about purchasing a prv or stetsom or nvx, don't. Buy this. For the price you can't go wrong

I returned the expert px2 and swapped to this one. The expert px2 had a white noise and pop when turning off. This unit is perfect, no issues regarding noise or pop. You will have to plan for some time to familiarize yourself with this dsp. The bluetooth is great as you can also stream music through this. I'd watch some videos, so your ready. I don't think you can beat this dsp for the money. Not sure of any others that also stream music close to this price It takes some tinkering and patience but it's well worth it. I'm very happy with this. I'm using my phone as the head unit for a classic car setup and this dsp has great gain control to get you where you need to be. I'm using the bluetooth and or a usbc to rca with the dac in the cord. Everything works perfect.

I highly recommend this DSP. Huge increase in sound quality, has 100% eliminated all of my engine noise as well. The app is pretty easy to navigate and tune the unit. Worth every penny.

Build quality is good processing is great the application is ok. The app takes a bit to get used to but once you figure it out it's pretty good. The unit is great, does what it's supposed to and store multiple settings locally. I love being able to change my time with just selecting a different saved tune. When I'm really pushing my system it gets a bit warm but have had no issues so far. For the price I think it would be hard to beat. Highly recommend if you need to tune your aftermarket system or want to upgrade a stock head unit to add anything you want.

First off - this thing does do what it advertises - I'll give it that. I used this to take two channels of output from my factory radio, tri-amp my front stage w/o using the passive crossovers, and feed my subwoofer amp. After figuring out how the app worked - this was simple. I was able to setup my crossovers, channel mixing and time delay without issue. The app though is an exercise in frustration. It constantly disconnects without telling you. It will often freeze after entering the password (which has to be done EVERY time). The app completely ruins the experience here. It worked better with my Pixel 9, but I could not get it to connect ever to a newer Samsung 10" tablet. I don't have iOS devices to test. Noise level - I had zero noise on my bench, but I have an audible hiss at all times from my highs in-car no matter the source. This could be my car, it's a PHEV so may be interference.... It's very minor, and I'm sensitive, so not blaming the DSP, but I do suspect it (previous 5 channel amp with no DSP did not add hiss).... Quality wise - the box feels built well, it's super tiny and lightweight. I do wish the power/gnd/rem connector was "something else". It's a bit wonky for what feels to be an otherwise decent product. I'd love to see an updated firmware/app that will deal with the connectivity issues and this will easily make this a 5 star item. Overall in terms of bang for the buck - it's definitely got that nailed.

I bought this to scratch my "tinker" itch. It does exactly what it says it does. Provides a very clean 4V output, verified with a scope. I almost wish I could use a proper laptop program instead of the janky feeling smartphone app but it does do what it promises. Provides what seems to be very solid crossover options. Very simple to map/sum channels. I haven't even touched the delays or limiter functions but this allowed me to stop chasing unicorns with very expensive DSP amps and instead focus my money on raw, clean power. I'm too happy bumping with the bigger amps this allowed me to fit in my budget to nitpick this thing. It provides a super clean foundation to built the rest of the system from and that makes it worth every penny. I'd buy it again.