Originally Posted by vinodk
Just acquired an Anthem MRX300. Will set it up in a day or two. Wondering if ARC allows you to boost the low end of the sub. I have 2 SI HT18D4's in 4cuft sealed boxes wired parallel & powered by Crown XLS1000 in an approx 2600 cuft room. I did a quick uncorrected measurement with SMS-1 & noticed a significant rolloff from 30hz down which is expected of sealed cabs. If thats the case can I use SMS-1 to boost low end of the subs or would that screw up ARC? Or is MiniDSP a better option?
Your best bet is to experiment with repositioning the Sub to see if you can get additional, low bass response. A thing called "Boundary Gain" happens when the Sub is against a wall or in a corner (if the walls are hard enough) that emphasizes the lowest bass, so that would be the thing to try.
However, if your Sub really can't put out bass below 30Hz at volume then attempting to force it to do so by boosting the input signal to it is not really a great idea. You may even damage the sub if you drive it so hard that the cone bottoms out. For this reason, ARC won't ever apply more than +6dB boost to try to raise weak output at any frequency.
So really, the answer here may be to get a more capable Sub.
Now, if you DO want to combine ARC with some other bass EQ system (such as SMS-1), the important thing to remember is that you do the ARC setup *LAST*. ARC has to hear the output of the Sub as ALREADY modified by whatever other EQ system you are using. ARC blends the Sub with the output of your Main speakers, and if you fiddle with the Sub's output -- i.e., change it AFTER you've done the ARC setup -- then that blending won't work right.
When you do your ARC setup for your new MRX, post the ARC results charts over on the MRX Owner's Thread here and others who've been through this may have additional suggestions for you.
In the Tools Menu of ARC you will also find the Quick Measure tool, which is a big help when trying to figure out if shifting the Sub's location can help get better output from it.