8 Channel Output 32Bits 96KHz Bluetooth Marts Digital DSP / BTX8-DSP

After several months of research/review watching, the MARTS BTX8-DSP came out as my top choice amongst entry level DSP for car audio. The 4 INPUTS and 8 OUTPUTS was a key feature for retaining fade capabilities. Connection via Bluetooth is effortless. The app controls for setting channel routing, gains and crossover points are very responsive while the EQ section could be a bit more refined as making settings isn't as finely tuned. My DSP is managed via a Galaxy phone, so the controls may be better on a device with more screen real estate. There are other DSPs that run similar software at about $80 but most of those DSPs are limited to 2 INPUTS. For $160 this DSP gives you a lot of functionality that you find in higher end units (Audison, Audio Dynamics etc) cost several hundred dollars more. IMO this is a great unit to add if you're just getting into DSP. This is a budget DSP that doesn't perform like typical budget gear. If I hadn't already committed to an Audio Control DSP Amplifier for my other vehicle, I would seriously consider going with the MARTS BTX8 again.

Very happy with this product. Cleaned up the noise I was getting and that annoying speaker pop when I turned the car off. Very clean sound now. I wish you didn't have to log into it every time but im still giving it 5 stars.

Do not but this if you live in the USA. The software for the Bluetooth will not connect to your phone. This product is produced in China and its not compatible for US phones software. I spent days trying everything to get my Iphone and my android phone to connect to the Bluetooth. I also contacted Big Jeff the seller of this pos! His team had no clue on how to correct or upgrade the firmware to work on American based phones. I should get paid because im the one that did the research and finally found an answer from the manufacturer. I was also told no you have to use a different app thaen the one it says to use in the qp still did not work. I cleared my cash on both phones when I swapped the software think that would help! No luck and very disappointing because it seemed to be a good dsp if it would have worked. It sad that Big Jeff and Amazon would know this was an issue. You get what you pay for. Stay away from all Brazilian designed dsp because you will have issues getting it to work. Plus the only way to setup the dsp,is through the BT app. The should give you an option to plug into the app with your laptop but they dont! STAY AWAY FROM THIS DSP!

The DSP works well and I noticed a difference in sound quality after switching out the Expert PX2R Connect 6 channel DSP(only is a noticeable upgrade with carbon fiber/fiber glass based speakers like the Alpine Type R series). However, the DSP worked best for my Galaxy S25 Ultra by downloading an older version of the app for this DSP not theough its included QR code. Not only that, I turned on airplane mode, turned off auto blocker under the security and privacy settings, turned on developer options and disabled A2DP communication, and under "Apps" I hit show system apps and under Bluetooth I put it on unrestricted battery use. I also did the sane within the actual Marts app as well making it unrestricted battery use. Keep in mind that the Bluetooth light on the DSP will keep blinking even when you are connected, and will only turn solid briefly as a new profile is being loaded to it.

This DSP performs very well. It has a 32-band graphic equalizer for the main inputs (4) and a 16-band parametric equalizer for each output (8) for each speaker. Think about the amount of control you can have. 1- I matched my voltage for the outputs and inputs correctly. 2- I did the crossover cuts. 3- I flat-eq the system with a little bump in the low frequencies. The results were truly remarkable, with the system delivering an incredible sound. 4- I could tweak every speaker to my liking, and the result was phenomenal. One more thing: It produced almost 5 volts out with no distortion whatsoever, and my amps are running super cool. My sub gain is set at about 11 o'clock, and my front/rear at 9. Even if you are off a budget, I recommend this unit. The Bluetooth connects super fast, the app is very user-friendly, and it has a limiter, master gain, channel gain, time corrections, you name it. This is a super unit. It is 100% recommended.

Oh yes. This is really deal. Sound quality is just awesome. I had used stetsom Bluetooth dsp before this and it sounds terrible. Just alone using this fixes audio quite a bit but remember you have to play with it and your EQ to get it just right. I was having distortion on my sub channel before and this fixes that by letting me cut off certain frequency. And yes you get 4 in 8 out channels 31 bands EQ AND 31 bands parametric EQ per channel. You don’t get 31 parametric EQ in most DSPs at this price range for all 8 channels. Really allow you to dial in. Build quality is also nice . You get shinier front side with clip for left and right channels. Also 8 limiter LEDs that also serve as clip when limiter not used. I’m using this for 4 channel amp and 2 skar evls 12 alongwith pioneer headunit. You also get a sticker with it. Packaging also feels premium. Overall fully satisfied.

The Bluetooth connectivity is the downfall of this product. It's a great compact unit with lots of capabilities, but I could not get the bluetooth connection to last longer than 30secs - I tried on iPhone, iPad, and Android phone.... If the manufacturer would fix the bluetooth implementation, this would be an excellent product...

Not able to get it to connect to my android so far. If I figure that out I might change my rating Update: bought an iPhone 6 on ebay for $50. Download provided the app, but it didnt work. I typed Marts in the app store and Marts digital popped up. I downloaded it and picked a model with 4 inputs and 8 outputs, and it worked. This dsp model is not an option when setting up the app. Just pick a 4 in 8 out and if it has an x, even better.

This is AMAZING, small but mighty. I was able to tune all my amps including the base. Love it.

This device is outstanding

The app literally does not work. I think the app itself is a fake Chinese one. If you download the official marts digital app it works although it disconnects pretty often. But once u do end up getting actual app to work this thing is pretty good for the price. Changed my sound system for sure