Sorry it has taken me so long to leave some comments on my subwoofers. I have been more busy than usual at work, so this will be my brief thoughts rather than a full review.
Order, build and delivery:
I asked for Nathan to make me a pair of 18.0 subwoofers as a active and slave pair that would match my Martin Logan Montis dark cherry speakers. I also asked him to make them a bit darker. I paid him on September 12th through paypal and he started working on them right before RMAF 2014.
The build time took about roughly 2 months which I expected. He shipped through DHL which ended up being a bit of a hassle, but not due to Nathan but because the delivery guy refused to deliver them without help.
Packaging and build quality:
The packaging was fantastic, about on par with Martin Logan's packaging of the Descent i's. The arrived undamaged. They are simply gorgeous, I feel the pictures do not do them justice. The veneer is nearly flawless. I am very impressed with the look of the subwoofers.
The hook-up and setup:
The slave unit hooks up to the active unit with a very nice connector supplied by Nathan. The amplifier can run from 1 XLR cable, 2 XLR cables summed into 1 signal for both subwoofers or 2 XLR cables running a different signal to each subwoofer. It is a hugely flexible unit. allDSP was easy to use after Nathan gave me a password. I connected the subwoofers, adjusted the subwoofers volume, ran Audyssey, adjusted the distance of the subwoofer using REW until I had the best bass possible, then boosted the bottom end of the 18.0's through allDSP and got to listening. I will say that that process took a few cycles with moving the subwoofers around into different locations. I did have a ground-loop hum issue and that was solved with an in-line XLR ground isolator.
Here are my measurement comparisons between the descent i and 18.0 with neither pair of subs being driven anywhere near their limits:
You will notice that my measurements only show the 18.0's adding a small amount of boost at 10-20hz. I found that interesting and I couldn't get them to be flat to 10hz in my room. I do admit that my room is an acoustical nightmare and I cannot add room treatments, but that shouldn't really hurt the low end extension. What the graph doesn't show is how much more power I heard and felt from the 18.0s. Watching movies I definitely have a much more tactile experience. The only issue I had with them so far is they localize more than the descent i's, so I can tell the bass is coming from them, but only at high volumes.
My favorite past subs were the SVS PB13 Ultra and ML Descent i. I would take any of these subwoofers again. The only reason I sold my PB13 was because they were not integrating well with my Montis Speakers, but before I had the Montis, they gave me all the bass I could need and worked perfectly well for music and movies. My Descent i integrated and "disappeared" better than any other subwoofer I've had and were my favorite for music, likely due to their perfect integration with my main speakers. Unfortunately they ran out of low-end steam on movies. The Funk are clean, powerful, relatively compact, beautiful and integrated fairly well. If I had to buy the Funk's again I would, but I'll probably just save up and buy the 18.2's in the future. If you forced me to pick my favorite, I could not, they all had their own benefits, but I currently love my 18.0's and I will be happy with them for a while.
Thanks to Nathan for his hard work. I would recommend working with him to anyone looking for a new sub.
I will continue to post thoughts as I listen to these subs.