DSpeaker Anti Mode Dual Core 2.0 Room Correction

Yes, you have the greatest flexibility from my POV by using the tapeloop. Allows as many analog inputs as your preamp has to be run through the Dual Core (which only has 1 set of analog inputs), and it allows you to use the Dual Core as a DAC.

Peter_s or anyone else, would there any reasons that the tape loop might somehow not be ideal? Really does seem the best of all worlds from a versatility standpoint.

Upstream from the pre but not in the tape loop, means only one analog input to the Dual Core.

Between pre and amp, you do not get the DAC functionality (unless you decided to use the volume control on the Dual Core as the volume control for your digital inputs, which seems to be a hassle and would bypass potential benefits of your preamp for your digital sources).

I am also curious to hear people's thoughts on potential power supply upgrades.

I see what you are saying. Yes, if you want to use the volume control of the preamp and its output stage into the amp, insert the unit in the tape loop.

I use a 12v battery ps on mine and found that it sounds much better than the supplied wall wort. I use my Dual Core as a Dac-Preamp. The D/C sounds less "hard" with better sound stage, and imaging. I would highly recommend looking into an upgraded ps for the D/C. My BPS is a custom job and I'm trying to find a reasonably priced 12v linear supply for comparison.

I have a 12v car starter, which is essentially a rechargeable battery with both battery leads and a cigarette lighter output. It can be used for an audio power supply - and recharged between uses. I will try that out. I've been in touch with Toni at DSpeaker, and he told me that users have reported that the Musical Fidelity vPSU mkii ($129) has led to improved sonics. I ordered one from Audio Advisor to try on their 30 day trial. Parts Express sells a 13.8v regulated power supply for something like $40. Toni told me that 13.8 is OK, but not to go any higher.