EAD DSP7000 owners Need your opinions.

I've been running a Boelen modified DSP-7000 Mk.III for some time now, and have no desire to change it out. I just moved to a new preamp (Pass X1) and the combination of it and my amp are such that I really can't run the volume control past about 10 or 11 o'clock before I've hit my listening limit. I run the DSP7000 with the 6 dB "HDCD" digital attenuation switched out. I tried switching it in but wasn't sure if there wasn't some loss of low level detail. I intend to experiment some more, but do other DSP7000 owners feel this digital attenuation might have a negative effect on the sound?