Thanks. I can deal with clumsy UI.
What I really meant was, did you find the processing of the dsp to be adequate? There's more than one way to implement dsp functions, they each have different impacts on the signal output quality.
You
As it handles the same amount of input channels it doesn't seem to add any real benefits over the t.racks.
Again its software can be downloaded to see but has a bit nicer interface and offers the possibility of a phone app as well, though limited. I wouldn't say either of these is better than the Behringer DSP on the NXD amps and that also gives wattage control to protect units from being overpowered.
Having the DSP on the amp isn't a bad option neither but then each amp needs to be configured on its own and then saved to memory. It will then auto load the last used pre-set. To me stacking amps wasn't much of an issue but for some, it might be.
I wouldnt class these external DSP boxes to be any better than those in the Behringer amps and would prefer the cleaner and simple interface it uses too.
Now if we compared these options to what can be done with an audio interface then you get software controls that are some of the best in the industry. With an interface, you also get the ability of frequency monitoring and better mixing controls.
If a user thinks they will maybe want to have 2x or more standalone DSP boxes for say 8+ channel controls then really they should consider a recommended audio interface option. Possibly using one via AUM on iPad or a PC DAW or what I am for doing and using the Behringer X-Air series products that uses its own software. Each option brings its own pros and cons.
A user may not have an iPad a user may not want to use a fully-fledged DAW software solution and the Behringer X-Air software kinda fits in the middle still offering all the control and monitoring you need but it can be controlled via PC, Android or iOS devices.
The audio interface approach opens up more doors and controls with the ability of using world-class EQ software plugins.
For me the X-Air solutions struck a nice balance and the ability to connect via wifi up to 10 phones/tablets to control it is brilliant. You can use an old phone or tablet for channel or frequency monitoring and another device for controls etc.
X-Air XR18 or
X18 are very good audio interfaces for the money and can be got sometimes in good condition second hand.
It depends how far you want to take things.