Jfrech,
my target is to establish a complete TRINITY line, whereby the sources match with the preamp and the preamp with the power amp. So and only so I can realize the best performance. If you want to use only the TRINITY PHONO with a single ended output you loose of course 6dB and 6 gain stages per channel are not used at all. Means you run a 12 cylinder engine on 6 cylinders. Not a good idea, even if it works, it is waste of money. If you calculate the so called noise figure of a multistage design, you will see that the gain of the first stage is the most important parameter. That means the low noise behaviour is not touch by a single ended output. Also the other parameters will be the same, but the gain goes down from 72dB to 66dB. If this will work depends on the gain of your preamp and the input sensitivity of you power amp.
The used 180µV MC is no problem, the 10 values of the MC load connector can be chosen by you, if you want one with smaller steps around 845Ohm we can assemble this for you.
A better interims solution would be to use Model PC-2XR from
http://www.jensen-transformers.com/iso_aud.html betwenn the TRINITY Phono and your existing Preamp. In this case you get the same 72dB single-ended. Please read the data sheet of this device. The distortions below 100Hz will increase with the use of the transformer, but even at 20Hz they are below 80dB for 4dBu (1,22Vrms) and your MC will deliver lower voltages. Means the distortions will also be lower.
Dietmar