Dayton AudioDSP-408 4 Input 8 Output DSP Digital Signal Processor with Built in EQ Crossovers, Tim Alighment, and in-Put/Output Mixing for Home and car Audio

If you're not using this for your subwoofer, you're missing out—100%.Subwoofers are never naturally flat in response, which often leads to a boomy peak between 35-70Hz while completely missing the deep low-end. That’s where the Dayton DSP-408 comes in—it lets you precisely tune your sub for a truly flat response and unlock the deep bass you’re meant to hear.I run a Rockford Fosgate Punch 15" P3 in a small sealed enclosure, which gives me tight, controlled bass but normally rolls off around 37Hz, just as Rockford Fosgate states. My amp has a 30Hz bass boost, which helped extend it slightly, but with the DSP-408, I was able to dial it all the way down to 23Hz—something I never thought I could do in such a compact box.Best part? My wife is happy since I don’t need a massive enclosure to get deep bass. Instead, I just fine-tuned the response with this DSP to get that ultra-low, clean, and powerful bass—without the extra bulk. If you want true control over your sub, this is a must-have. 😎

Despite using high end components, my car stereo had some dead spots in it where it just sounded flat. I tried several different approaches and then is dawned on me- I used a DSP for my other systems at home (dbx driverack) and they solve problems, so I ripped out my AudioControl components and started over with the Dayton DSPThe windows app is fine- it’s simple and makes sense. I honestly can’t believe people complain about not having a flashy app with skins etc- it’s just a tool for setting up your rig. Thank you for NOT making some silly bling app. The capabilities are exceptional and everything works exactly as expected. The sound is clean and clear, and it can do everything I need. Now, thanks so a calibrated microphone and an RTA app... it’s finally a good sounding system.If they wanted to take it a step up, I’d appreciate a sub harmonic synth or a BBE type processing ability or license AudioControl’s much sought after ESP2 and build in the capability. I’d put one in all my cars if they added those features.All in all,I absolutely love this DSP- it’s finally made car audio SO much easier. Anyone can now have a killer system if they take the time to set up properly.My system: Chevy MyLink head unit, Dayton DSP, Alpine Amos for sub and fronts, stock Boston Acoustics amp for rear speakers. All Polk MM components & Polk MM 10” sub. AudioControl ESP2 and Epicenter.

I wanted a stealthy system but the AudioControl DQ-61 eq that I had previously is controlled by knobs so I Installed it in the glovebox compartment. I didn’t like this setup. I replaced it with the Dayton dsp-408 because it is small enough to be hidden away under the dash and it has bluetooth and it’s cheap. The other dsp with bluetooth easily cost double.I used to have the factory deck > AudioControl DQ-61 goes straight to the > amp. Now I have deck > AudioControl Lc2i > DSP-408 > amp which costs about the same but sounds much better. However, most of the time I use a LG V20 phone with quad DAC connecting straight to the dsp, completely bypassed the deck and the lc2i. This method sounds best. I only use the deck/lc2i for phone calls or when I don’t have the v20. By the way, don’t use the dsp-408’s speaker wire input(doesn’t sound good), use a quality active loc like the lc2i instead.Controlling my dsp unit via app is much better than via knobs. It’s much more precise which resulted in clear separation between speakers, sounds, frequencies. My 10 inch sub never sounded better before. I clearly have a sound stage now and I can position it precisely. I really enjoy music in my car now.I agree with others that the phone software is kinda weird but once you understood it becomes non issue. I liked it so much I actually got a second unit to replace in my other car. Both systems sounded a few times better and I am happy not having to spend a fortune but able to achieve decent sound, style, convenience.I recommend you trying out this unit before spending more $ upgrading your speakers, sub, amp, etc. you’ll be surprise how good your already existing system can sound. Just make sure you run 100% oxygen free cooper wire throughout and solder whenever you can instead of crimping. That’s it nothing fancy and you can thank me later.