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Any relatively affordable 4 Channel Amp+Dsp in one (little) Box?

Sokel said:
A plate amp and a Wiim, that's all.
Click to expand...
This thread is about DSP/crossover hardware with an integrated amplifier for 2-way (or 3-way) active speakers.
 
Roland68 said:
This thread is about DSP/crossover hardware with an integrated amplifier for 2-way (or 3-way) active speakers.
Click to expand...
Plate amps do crossovers just fine. And fairly safe, reliable ones.

What's rest?
 
Sokel said:
A plate amp and a Wiim, that's all.
Click to expand...
My case is similar to OP’s, speakers will have uncommon shape, so installing a plate on the back is not an option. Also it would be great to reduce the amount of cables for aesthetic reasons, so all-in-one box would be a perfect solution.
 
MMMarciNNN said:
My case is similar to OP’s, speakers will have uncommon shape, so installing a plate on the back is not an option. Also it would be great to reduce the amount of cables for aesthetic reasons, so all-in-one box would be a perfect solution.
Click to expand...
You don't have to install it, just stick each one in a box nearby and you're golden.
You can even use it as a base.
 
Fosi CA30 4ch

DSP for each pair is silly limited, you need to choose HPF or LPF, cannot do bandpass.

I like to keep the sophisticated DSP at line level only, not integrated with power amps.

Lots more flexibility, for future changes, without overspending on overkill wattage up front.
 
Try to get this one. I used it also for 2 channel 2way project.

IMG_1265.png


Pioneer stopt producing it but you can still buy it.

4 channel with dsp.

Or use the York device, just ad power supply and housing.

https://www.audiosciencereview.com/forum/index.php?threads/york-dsp-devices.70254/

IMG_1266.jpeg
 
Last edited:
@Koifarm
I still owe you the 8 channel DSP board for tests.
Could not finish work on the software but now looks like it is converging, so please expect a parcel in 2 weeks :) I have the address.
Been busy with making the software to support different devices: DSP modules and new amplifier. Fixing many small things takes enormous amount of time.

Regarding the topic, in the recent months I was mostly working on this 4 channel amplifier:
1783072239245.png


It is designed as a plate amp, has USB audio + dsp config port, I2S and S/PDIF inputs.
For analog input there is also interface board with ADC. And for configuration it uses same software GUI as the 2x4 DSP.

I mostly post on DIYAudio about it:

Centure24: 4 channel DSP D-class amplifier

Made a first live demo video :) Sound level is a bit low, sorry about that
www.diyaudio.com www.diyaudio.com

I'll bring it here as well.
 
MMMarciNNN said:
Bumping the thread because I’m looking for similar solution, maybe something new appeared on the market since last year. To be honest I’m quite surpsrised that no one produces affordable all-in-one box that would integrate DSP, 4 or 6 channel amps, AND a player/streamer. Everything in a single device that you can turn on with remote control or app and just play music from pendrive or Quobuz/Spotify. It would be like a holy grail for DIY speaker makers on a budget.
Click to expand...
This sounds like a budget AVR.
 
eclipsevl said:
@Koifarm
I still owe you the 8 channel DSP board for tests.
Could not finish work on the software but now looks like it is converging, so please expect a parcel in 2 weeks :) I have the address.
Been busy with making the software to support different devices: DSP modules and new amplifier. Fixing many small things takes enormous amount of time.

Regarding the topic, in the recent months I was mostly working on this 4 channel amplifier:
View attachment 542639

It is designed as a plate amp, has USB audio + dsp config port, I2S and S/PDIF inputs.
For analog input there is also interface board with ADC. And for configuration it uses same software GUI as the 2x4 DSP.

I mostly post on DIYAudio about it:

Centure24: 4 channel DSP D-class amplifier

Made a first live demo video :) Sound level is a bit low, sorry about that
www.diyaudio.com www.diyaudio.com

I'll bring it here as well.
Click to expand...
What are the main differences between your devices and Dayton KABD/Wondom JAB5? I’ve read that KABD is a nice cheap starting point for beginners, but produces noticeable hiss. If it sounds like a noob question than yes, I’m a newbie.
 
For me the products enables me to build dsp/active crossover with better specs I can buy yet.
For a nice price.
Like -125db THD + N by adding my own es9039q2m dacs. And 192khz sampling rates.
No hiss.
Try to buy that.
 
Last edited:
MMMarciNNN said:
What are the main differences between your devices and Dayton KABD/Wondom JAB5? I’ve read that KABD is a nice cheap starting point for beginners, but produces noticeable hiss. If it sounds like a noob question than yes, I’m a newbie.
Click to expand...
I think of two major differences:
1. They use ADAU1701 DSP with built-in ADC for analog input. This is the reason for "hiss" - this ADC is quite noisy usually, this is also feedback that I got from speaker makers.
In my designs the ADC frontend is designed to minimize the noise. Here is measurement of the noise floor of the ADC:
1783327025506.png

(same ADC is used in the 2x4 DSP and Centure24 amplifier)

There is practically no audible difference if I switch between ADC and digital inputs. With my ear directly to the tweeter :)

2. For configuration of York DSPs there is user-friendly GUI software, instead of the SigmaStudio.
 
So if someone uses only digital input in ADAU1701 is it possible to completely shut off ADC and eliminate hiss this way?
 
MMMarciNNN said:
So if someone uses only digital input in ADAU1701 is it possible to completely shut off ADC and eliminate hiss this way?
Click to expand...
ADAU1701 has both ADC and DAC, so if you avoid using both built in ADC and DAC - yes, defenitely.
I am not so sure about DAC quality but the ADC is biggest contributor usually.
 
miniDSP PocketADC is a pretty clean gadget but only stereo.

I dunno any cheap 4ch equivalent though, would love to learn of any.
 
Roland68 said:
thomann t.racks DSP 4x4 Mini Review

Then this small market will be suddenly and extremely reduced again.
For such cases, I have an old used HP business notebook.
Click to expand...

DrSpan said:
Wow i completely missed this! Will study it tonight. Thanks so much!
Click to expand...
However, this is a test of the DSP without built-in power amplifier channels.
eclipsevl said:
ADAU1701 has both ADC and DAC, so if you avoid using both built in ADC and DAC - yes, defenitely.
I am not so sure about DAC quality but the ADC is biggest contributor usually.
Click to expand...
Does the ADAU1701 have digital inputs and outputs?
 
Currently I use Wondom JAB5 for a stereo 2 way system (each ch separate amp) 4x100 W on 6ohm. I use it mainly with bluetooth AptXHD.
I use with the PCUI software but for that the ICP must be connected ALL TIME!
I must say it is quiet noisy.. (ok I use with 100dB+ selenium D220Ti in Horns and B&C 8NDL51 94dB).
I love if for music..
They also released JAB6 with is TPA3255 2x so 300W on 4 Ohm if you can power it (48V).
What is yet unclear to me how these addoncard work. It got quiet a price bump, (but still a lot cheaper then any other 4 ch +dsp).
Question if it works with DSP AND bluetooth together or are those different cards and you need to choose
Then there is also a bluetooth reciever, and I would use the DSP but that is like 150€ ish...

I also considered Hypex FA 253 or 503 (only the fan though..) but I wouldneed 2 of those (plan to add bass driver to the 2 ways to make them 3 way full range). that is 1400€.. ouch.

I have seen the Acoustas 650 which looks also nice, but pricey for my build.

I also have 2 BRU5 (no ICP5 needed use different software).
Could also work well.

I am currently thinking to make a passive crossover (or leave is active crossed).

So your luck is that today there are a lot of options for a 2 way... but if you want 3 way.. that is a diffement anymal...
JAB 5 and 6 are also daisy chainable (so you can get more amp ch-s and still have DSP controll over each).
Maybe I will try a JAB6 next time hook them together with the JAB 5 , bridge those for subs or any other combination.

That is the cheapest solution and you have a LOT of flexility...

And if you find out what solution do you like, you can move foreward to Hypex nCore, MiniDSP - T-Amp or other.

Will yours be a desk setup or a living room setup ? Mine is planned for a living room. But no smart TV, only coax output so I am quiet picky... would love HDMI CEC... sooo comfy with chromecast on my Onkyo Reciever :D which also works with bluetooth.
 
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