Well, the new system is up and running after some issues. First issue was the massive hum out of the main subwoofer system once i hooked up the MiniDSP.
After doing some postings and reading i ended up doing a chassis ground from the Mini to the outlet it was plugged into. That was a perfect fix, totally silent !!!
The AUX subs were a different story. Only way i could get them to quiet down was ground isolators from Ratshack. They are not free from the hum as the mains, but unaudible from the LP...
The fit and finish of the new subs makes them look like they have been in the room for ever
Now, on to the MiniDSP. What a slick piece of gear this thing is. I have to say it has everything i will need to accomplish this project.....
First off my main quad 15 system has huge room gain/cabin gain. A simple Low shelf filter brought me level with about 5.5db of gain. I had to add a PEQ filter to bring down a little peak and that was it. That took all of ten minutes LOL.
The AUX subs required a little more work. They were filling in quite a dip in the response above 40hz. That dip or depression was straight across the LP. Since i needed nothing out of them below 40hz i decided to use a HiPass filter to increase their handling ability and not mess up the nice response i was getting out of the mains from 40hz down. I wanted to low pass them, but it reacted with the response too much, so i decided to let the LFE do its work at 120hz. Once that was done i was able to increase their gain to fill in the null and it worked perfect. The second AUX sub was calibrated the same way, but for some acoustical reason 25hz hipass was the best i could do without it messing with the main response graph at 40zh and above.
This little MiniDSP is a damn sweet piece of gear. I will be leaving it powered all the time as well as the AUX subs. Terrible turn on thump ! Besides that it is, and has been the perfect solution to my Welti and Devantier flat response subwoofer system !!!!!
The OmniMic is also perfect for this project, with both screens minimized i was manning the helm like a real pro, building filters and making changes on the fly like a had a brain in my head or some thing. Between the OmniMic and MiniDSP i have to say they get a Five Star rating. The Advanced 4way plugin for $10 bucks is laughable when you think about it, $10 bucks and you get all this power. I am smiling ear to ear.
I have to thank Marcus over in the Audyssey forum for continuing to harp on the findings of Welti and Devantier, thanx buddy !!!!
As of Jan 2017, im still looking for (1) Outlaw M-200 mono amp, and a used Marantz 7010