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

Needed to boost up the low end of my car subwoofer. Without it my sub just made the bass louder and a little less defined, with it i can set a very low crossover for my sub, lower than my amplifier or head unit allowed for, and eq boost at 23hz. System has the depth and balance i want now. Will probably add a 4 channel amplifier and really dial in the sound of the rest of the system later. The matrix signal mixing system could be confusing, but it's legit. Lots of flexible possibilities! One thought I had for a car setup you could create from just left and right input; you could create active 3-way front left and right speakers using 6 of the output, down-mix to mono for a single channel rear-fill, and down-mix a sub-woofer channel as well! Awesome! Another great feature, the DSP-408 let's you group output channels so you can apply equalization and filters in unison, a feature i wish Mini-DSP had! Very happy with the unit. Pros: Cool signal mixing system! 6 band parametric equalization per output channel. 6db/12db/18db/24db selectable high-pass and low-pass filters for each channel. Strong 3.5 volt RMS Output. Smart phone configuration with Bluetooth accessory. Good build quality (some sharpish edges on aluminum engraved logo) No turn off noise or POP! Low Price! Cons: Some slight turn-on noise. (very low) Some sharpish edges on aluminum engraved logo.

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 DSP The 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.

4 stars because alternator whine. That said, this is not designed for automotive use using the RCA inputs. The RCA inputs are unbalanced and will not work with a preamp. My solution was to use a preamp that has 4v balanced outputs and feed that into the high level inputs and turn the gain up a bit. Worked flawlessly to get rid of the alternator whine and hiss when the engine was off. Once the noise floor issues were solved in my mobile environment, tuning was next. Pro tip - the bluetooth adapter is great for getting audio into the unit, but the app is f*** trash. You need a laptop to program this thing. Once you get the software running on a PC and plug in, its very simple to tune. Took 5 minutes to get this thing sounding perfect with my computer, and 10+ hours trying to get it to work with my phone. Just use a PC. Once set up correctly, it brought my system to life. Concert quality audio, not even kidding. The before and after is incredible - when I disable everything and make it sound original, it sounds like you have water in your ears (my radio sucks) but once tuned, nice and crisp. The crossovers for the low end actually work - and well for that matter. Bass was muddy using the built in crossover in my amp. Got this thing set up and just wow. I didn't know my subs could hit that low, or high. Woke my system up.

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.

I've heard that a few people have had unwanted noise issues with this unit. Personally I've had no noise problems at all. That said I put a ferrite choke on the ground approximately 3" from the dsp and I'm using audioquest tower rca's 2'. So far I'm very impressed with this dsp! The software for windows is a breeze to set up. Atm I'm using it with Focal access 2way passive and in the near future will be running 3way active again with the Focal 165AS 3.

自宅で自作2wayスピーカー(swあり)でリビングオーディオを楽しんでます♪ 部屋ごとに環境が違うので、どんなスピーカーでも調整は必須だと思ってます。 車だとカーナビである程度の調整はできるのに、なんでホーム用にこういうシステムがないのか不満でしたが、購入して全て解決しました♪ ノイズもなく音質の劣化は全く感じません！ 私はWindowsがないのでiPhoneでBluetooth(別売り)しましたが良好です。 しっかりとした説明書がありませんが直感で操作できます。 ツイーターのハイパス調整はこういう機器では要注意ですね。 海外レビューでは、カー用に使う場合はバッ直などノイズ対策が必要そうですね。

Alles bestens

Se tiene que tener detalles y ajustarlo muy bien apoyandote en un RTA en mi caso lo use a 4 vias y acopla muy bien el sistema no lo use con control ni bluetooth solo a la pc en ocaciones se desconectaba pero si se almacenaron los presets

Also. Ich hatte vorher von Alpine die PXA-H700 und 701. Im großen und ganzen kann der Dayton 408 mit(!) dem zusätzlichem BT Modul und der Bassfernbedinung das gleiche für wesentlich weniger Geld. Abstriche sind nur die Anschlussmöglichkeiten, wobei ich aber dazu sagen muss das ich auch beim Alpine nur die 2 analogen Aux in benutzt habe. Alles andere läuft in der Regel über die Headunit. Die Dayton App für das Handy ist absolut ok und kann 1 zu 1 das selbe wie das PC Programm. Vieleicht noch einen kleinen Minuspunkt der aber nur für Spielfreudige Menschen ernstzunehmend ist. Ich hätte mir gewünscht die Laufzeit über die seperat erhältliche Fernbedienung steuern zu können. Das geht zwar auch per App aber halt doch etwas zu leichtgängig und etwas ungenau wenn man ein wenig mit dem Gehör nachbessern will. Manchmal bleibt ein Drehrädchen halt doch besser als ein Touch Display. Ich habe den Dsp sowohl im Auto als auch zuhause für den Aktiv Betrieb ausprobiert. Alles in allem 4 Sterne. Preis Leistung eher 5