using a multi meter and "listening with a test speaker for overtone" but I like the meter better
I do too. I have pretty good ears, but prefer to see the data.
Other than that unless you have amps sharing coils or subs of same enclosures or not knowing where your xover's are set that to me ends the functionality for HT.
I might be down the road. I'm running 3 drivers per cab, each cab wired to a 4,000. If the power isn't enough I might combine the subs in a 2,2,2 setup off of 3 EP4000's which would leave 2 running off 1 amp, with the 3rd running off another amp.
Beyond knowing the AVRs max voltage, some of us use a BFD or similar in the signal chain. We drive the BFD(using the indicators looking toward the AVR signal) to just before yellow lights with heavy bass reference discs. This ensures no clipping signal to the amp.
Yup, I liked the DCX and BFD for that reason. My SMS1 doesn't have the ability, but sure would be nice if it did.
I'm thinking the DD would work great for setting the gains on my 3009 and SMS1, and then I could set the gains on the EP's via the clip lights. It's either this method, or I can try and snag an Oscope from my friend who owns an audio shop. I like the DD1 as I would own it, and am sure would be used multiple times throughout the tuning process as I tweak the eq.