Is my amp the problem?

Erik, I have no experience with miniDSP products. But for example if the OP is using the 2x4 model or the 2x4HD model I would be skeptical that a product incorporating two channels of A/D conversion, four channels of D/A conversion, sophisticated digital signal processing, as well as USB and Toslink digital audio interfaces in the case of the 2x4HD, while selling for list prices of $105 and $205 respectively, would not significantly compromise the sonics of Modwright electronics. So I don’t find Auxinput’s comments about it to be surprising.

But yes, measurements would most likely be necessary to properly match the mid/high and low frequency gains and sensitivities.

Best regards,
-- Al

Regarding A/D, DSP and D/A.  I have done comparisons on a high-end device.  The Bryston SP3 has very high end power supply, audio stages, and A/D, DSP and D/A.  Even on this device, when comparing audio using Bryston complete pass-through (just going through it's discrete Class A audio stages) and the Bryston DSP (using A/D, DSP, and then D/A).  When using the A/D - DSP - D/A, the sound became much brighter and I did lose some midbass/midrange body - probably lost detail in areas as well.  I suspect it will be far worse with a product like miniDSP.

Wow lots of great suggestions THANK YOU ALL!! very, very, kind.

I am using the 0.775 input setting on the crown. The minidsp is a 2x4 HD. Speakers are DIY. Woofer is sealed and midrange is OB.  I removed the passive XO from the woofer cabinet. Aux, I can reinsert the passive XO external to the cabinet and not use the mini: Good suggestion. Note: I was able to get some improvement volume wise by adjusting the gain to +6db on the mini. That helped. regarding the 30 ohms impedance on the woofer, I could put in a zobel to tame that right?   Now it seems to be a qualitative issue, bass is blah.

Lots of great suggestions.I can't thank everyone enough.
Question: exchanging the crown for another similar amp (QSC) would not yield an improvement correct? also, more power wouldn't help right? I think the Emotiva or used A/B amp with a good supply would yield better results.

BTW, I am only using the LP crossover in the mini @ 225 hz. I would not even consider using the HP to the Modwright. The Modwright is a wonderful piece of equipment and Dan is a great gut to work with.

Based on that, I'd say your biggest problem is lack of measurements.

Don't change any hardware. Get Room EQ Wizard and a Dayton imm6 microphone ($25, calibrated) first.