Dartzeel w/Other Preamps.

I’m guessing the likelihood of someone having heard/compared the Holo and the Dartzell is pretty remote. Maybe pm member mikelavigne regarding the Dartzell itself and see if you can assess from his comments the distinctions. Mike has Dart gear.

Also, if you are not a member of WhatsBestForum maybe consider joining, there's a specific Dartzell Forum within it. Mike is a member there as well

Aye. 

I also had the dart combo. Someday I replaced the NHB 18 with the MFA baby reference preamplifier. Never looked back. Don’t waste your money. IMO darts are extremely overrated. I sold them both. 

@thanasakis can you tell me a little more about what you didn't like about the darts? What makes them so overrated?

j-wall  I bought them in 2010. In the third year the power ampl failed (one output was not audible). After multiple communications with Mr. Deletraz (very nice man), I sent the amp to Switzerland. Returned within a month. The fault had been fixed. I sold the amp and the new owner reported another malfunction (one eye not lighting up properly). I don't know what he did next. That's about the amplifier. Let's go to the preamplifier. Within a year of buying it, I found that the black rubbers surrounding the two potentiometers had started to polymerize (!!!!!) I was shocked as soon as I saw them. From that day on, I was careful when I needed to rotate a potentiometer, not to touch the rubbers, lest they be cut (!!!!!!!!). Unacceptable for a machine worth €20,000 (when I bought it). As for the audio quality, they sound great! but no better than the preamplifier -power combo I use today even though they cost less than half what the darts were! That's all.