Hello hornJunky,
i use around 20 years DSP crossovers with magnetotatic speaker systems and will give you one information, ....hope can help you little bit.
1. STANDALONE dsp-crossover with Master Volumecontrol 2x4 way
I think this new dspNexus from DANVILLE SIGNAL now the best Standalone product on the market.
Price around USD 3.000,-
https://danvillesignal.com/dspnexus-dsp-audio-processor
This crossover using WEAVER AUDO software for programming all the crossover function like delay, high,low,bandpass- filters, etc, etc.
It is a very flexibel model system, ..with realtime listening control if you change parameters.
Here a video hoe Weaver Audio software work:
A other option for a good DSP Standalone crossover + preamp is maybe this one from the Australia company ANALOG pRECISION. I personal not like this company because they talk very unfriendly with me if i ask some technical questions, so i don`t like this company. But i will show you this product as maybe alternative product to DANVILLE SIGNAL.
analog-precision.com
2. DSP CROSOvER with USING PC + pc software + Mulicannel Soundcard
a) You need a fast Audio PC - optimized for Audio for Highend.
b) You install a player software like JRIVER etc. and a good multichannel crossover software on the PC like:
- DEPHONICA (great value for money)
https://dephonica.comekio
or
- EKIO
http://www.lupisoft.com/ekio/
c) You need a very good 8-cannel USB-DAC with master volume-control like one of this:
- OKTORESARCH DAC 8 PRO (great value for the money)
https://www.oktoresearch.com/dac8pro.htm
Review from this OKTO DAC 8 PRO:
https://www.audiosciencereview.com/...d-measurements-of-okto-dac8-8ch-dac-amp.7064/
or
- EXASOUND E68
https://www.exasound.com/Products/e688-channelDAC.aspx
or
- ACKOLAPS ---- High quality 8-cannel DAC with I2S and USB Input.
New- AK4499EX or ES9039PRO-based DAC in stereo, mono or multi-channel mode
www.ackolabs.com
......there give much more like from Merging, RME, etc, etc, i show only some with good sounding and with master-volume-control.
3. USING A PC with 8-channel I2S PCIe card + 4 Stereo DAC with I2S In.
This option is very nice and very good quality, if you have a little bit electronic DIY know how, ...or you have a friend who help you.
You need this parts:
a) fast good Audio optimized PC ( same like in point 2 )
b) this high quality PINK FAUN PCIe card, with 8 channel I2S output.
c) a special crossover software DEPHONICA or EKIO (same like in point 2)
d) 4 pieces of SOEKRIS DAM1021 Stereo R2R DAC boards with I2S Input
Home page for Soekris Audio apS
www.soekris.dk
Info: You can make master-volume-controls for all 4 DAC boards very easy, with using a 4-way 10k potentiometer, ...and connect 1-way with every board. No Audiosignal run over the pot, Poti is only the reference resistor for the digital output volume control of every board.
Potentiometer like this.
https://www.aaranis.com/index.php?main_page=product_info&products_id=395045
In this 2 info links you can see and find more information about, how to make a volume control with this Soekris R2R DAC board, ....what power supply this board need, etc., etc. ......
https://th.aliexpress.com/item/32911158189.html
Soundsample with using this SOEKRIS R"R DAC board only as a bridge for 2x4way active system. Good sounding system from a friend in Bangkok.
PS: I`m not a friend from DEQX. Why? In my opinion the value for money is not the best and you lose to much dynamic with DEQX, ....but i listening only one times DEQX Talking about Audio parts always subjektiv.
Add. Picture from my old system with "Fischer Antheus" speakers with 4 inside 12" Iophon PLS320 subwoofer and FOSTEX Magnetostatic speakers. with a 2x4 way active DSP crossover system from TACT AUDIO and a CD-Drive from AUDIOMECA. This system is from 2004.
Now i`m planning to make a new system.