Is DEQX a game changer?

After you add the mscaler/Dave, then measure the speakers & subs and use these impulse responses to set delay. DEQX will measure what it hears from the speakers, irrespective of what is in between it/them.

Because I don't have details of your specific speaker wiring your previous posts infer that there are two sets of cables to each speaker - one for mid/high and another for the 'subs' (ie woofers - your post says ...."in my case I will need "single amp with stereo subwoofer" as I have two subs - they're built into my speakers")

If you set P1 with the subs disabled, then bass frequencies may not be present as the cabling feeding the subs will not have a signal. It all depends on the frequency range of your speakers without the 'subs'.

Yes you are correct. I have my speaker cables connected and they Are doing the highs and mids. I have an rca connected to my subs taking care of the low frequencies. Deqx set it up with the rca doing sub duties but I can have full range through just a speaker cable. 

My speakers are designed to go full range without an rca connection. They included an rca for home theatre and movies and having more options for Setup.

 I am hoping the deqx can run p1 with no subs full range and then when I switch to p3 for movies it will include the subs for the bass section and the speaker cables for mids and highs,without having two sets of deqx configurations. 

What speakers and dacs are you running with your hdp5 and hdp3? Sounds like an active Setup to me. 

Yes you are correct. I have my speaker cables connected and they Are doing the highs and mids. I have an rca connected to my subs taking care of the low frequencies. Deqx set it up with the rca doing sub duties but I can have full range through just a speaker cable. 

My speakers are designed to go full range without an rca connection. They included an rca for home theatre and movies and having more options for Setup.

 I am hoping the deqx can run p1 with no subs full range and then when I switch to p3 for movies it will include the subs for the bass section and the speaker cables for mids and highs,without having two sets of deqx configurations. 

What speakers and dacs are you running with your hdp5 and hdp3? Sounds like an active Setup to me. 

Yes, I have an active setup with 3-way Open Baffle speakers on the HDP-5 (4 x 15" bass, 2 x 8" mids, 2 x Ribbon tweeters) & two Subs (2 x12", 2 x 10") on the slave HDP-3. All running as a 5-way stereo setup, 12 drivers in total - crossovers, time & phase alignment handled by the DEQX processors.

Whatever you do with P1 & P3, you can have one configuration (assuming your calibration for the main speakers is full range) but disable the subs on P1. However, your comment about the speaker cables doing highs and mids & subs taking care of low frequencies suggests they may not be calibrated as full range so P1 would have no bass frequencies without the subs. Was your initial measurement of these speakers as full range with subs disabled?

If that’s the case then make sure that the speaker calibration you use for P1 is based on a full range speaker measurement, not just highs and mids.

Yes you're right they weren't calibrated as full range. It was only done for the mids and highs, and If I disconnect the subs I wont get any bass frequencies. Can the deqx be configured with full range for P1 (once we do this) and then for P3 using the subs as I am now on the fly? I assume that should be easy right? Or do we have to change Deqx profiles?

Nice setup btw. Wow, that bass must be out of this world.. I am thinking of getting the HDP5 to future proof myself in case I go active, instead of the premate. Plus the screen looks pretty cool