Primaluna Integrated with a seperate preamp

Interesting Saki70, since the PL site/manual itself says that it does not only NOT use unity gain, but states it is inferior. Now, the response above that was quoted from Upscale states it DOES use unit gain. 
Weird.
Clarification?
thanks, Gary

Ive had my HP Integrated about 4-5 months how.
On my speakers, Dali Helicon 400 v1, 88dB, 4 Ohm, the Ultralinear and especially the Triode sound thin, dry, poor soundstage- mostly just left and right, not L/R/Ctr, front, rear soundstage. 

So this was my question: Is this due to the preAmp 12AU7 tubes?
Or the stock PL EL34s?

So I hooked up my Eastern Electric BBA/Booster Buffer Amp (a tubed preAmp with a Volume knob and Gain knob only) as a PreAmp into the HT bypass of the HP Integrated. Now, we are in business.

Like night and day. Suddenly I have texture, nuance, power, soundstage galore. Exactly what I am looking for. 

So I will contact Kevin @ Upscale Audio to ask him about this situation, and I may need to replace some of the stock PL 12AU7s. Or perhaps there is a defect? 

Any suggestions?