DSP Nexus and my setup???

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rhale64l7

  • Jr. Member
  • Posts: 35
DSP Nexus and my setup???
« on: 25 Apr 2025, 12:10 pm »
I have been considering a DSP crossover for my system. But ai am wondering if this would be overkill for my application. I have an Anthem AVM90 that I use that has a very good eq system. So I would mostly be using this for strictly the active crossover and time alignment of drivers. My system is s AVM90 going to a Sublime Acoustics kt235 into 6 Orchard Audio Ultra modules. 3 per speaker. My speakers are SB Acoustics Sasandu Textreme's. They are angled baffle speakers. I could use an OEM version of this I suppose. Anyway how would I get help with developing a good solution for these speakers when you don't have any to test? I see you did a great job on the Maggie's and CSS speakers. But you can and have bought them to test. These can be bought now. But how would I get help? And how much better would it be? If I were using my Anthem AVM90 for the DAC and equipment part. Thanks for any help.

HAL

Re: DSP Nexus and my setup???
« Reply #1 on: 25 Apr 2025, 01:06 pm »
When I sell the dspNexus 2/8 I do the customer DSP crossover design.  The customer makes measurements in his room for use in the new design.  If you can make REW measurements with your existing setup with REW, then those can be used as well.  I can discuss this process if needed.

Once the dspNexus 2/8 system is setup, you can use your phantom powered measurement mic, cable, stand and the dspNexus to make the needed frequency response measurements with REW for the new design.  Something like the Dayton Audio EMM-6 or Beyerdynamic MM-1 are fine for the measurements with REW as they have calibration data available after purchase.  There is a phantom powered mic XLR input on the front panel to make connection and with Measurement mode drives REW.

The dspNexus 2/8 would go between the AVM90 and Orchard Audio amps direct driving the speakers.  It would replace the Sublime Acoustics crossover.

The dspNexus 2/8 becomes the 8 channel DAC output to the Orchard Audio amps.   The AKM AK4499EX DAC's are excellent DAC's.

If multichannel decoding is needed, the AVM90 decoded stereo analog outputs can feed the inputs on the dspNexus 2/8.

Let me know if you need any other information.

rhale64l7

  • Jr. Member
  • Posts: 35
Re: DSP Nexus and my setup???
« Reply #2 on: 25 Apr 2025, 01:27 pm »
Yes this will be a dual use setup as you have probably figured out already. I use it for music and movies. Your system is the only DSP based that I could see using. Because of the 4499ex Dacs. I have said I am not going to use inferior Dacs after my processor. It just doesn't make sense.
Are you using the newer DSP engine yet? Or still working on it? Thank you for the quick reply.
How much of a sound change could I expect?. Would it be worth the expense?

HAL

Re: DSP Nexus and my setup???
« Reply #3 on: 25 Apr 2025, 04:02 pm »
The production dspNexus 2/8 with the AK4499EX DAC's uses the Analog Devices ADSP21569 DSP processor.   This was an included upgrade to the EA systems that came with the ADSP21469 DSP.

I am not familiar with the AVM90 sound.

In custom installs for each customer to date, the sound quality of the upgraded dspNexus 2/8 has been a sound quality improvement over the existing system.  That is in comparison to live orchestra hall concerts that one of the customers attends regularly over what he had previously.

rhale64l7

  • Jr. Member
  • Posts: 35
Re: DSP Nexus and my setup???
« Reply #4 on: 26 Apr 2025, 04:00 am »
How would I leave the eq for my mains out of my ARC Genesis solution? It eq's all channels and balances the sound between 9 speakers for my home theater. So then it would be r- eq'd. If I could figure out a way it might work. I know the AKM 4499 Dacs are very good. I have the Sabre 9038pro in the Anthem. But it doesn't sound like a ESS DAC. I compared the 4499 to it and I liked both for different reasons. I could live with either. Thanks for all your help. I wish I could have talked at Axpona but unfortunately the partner in crime broke her foot. Maybe next year.

HAL

Re: DSP Nexus and my setup???
« Reply #5 on: 26 Apr 2025, 11:10 am »
One method would be to use the USB or S/PDIF digital inputs on the dspNexus 2/8 for sources and bypass the ARC Genesis on the Analog inputs. 

A PC, MAC or streamer with compatible digital output could be used as input and the dspNexus Control center with remote can switch inputs and do the volume control with the AK4499EX DAC's.   The PC would be there to run Audio Weaver for the program with the XMOS driver for USB input for programming and USB Audio.

Glad to help.