Hi first time posting in this forum, but have often lurked to see the reviews and measurements. Thanks, Amir, for your efforts.
First off, this amp (the Crown Dci 4-300N) is positioned at the bottom tier of the DCi-N line from Crown. There are two or three similar variants from what I can tell. There is an all-analog line (the regular DCi), the networked DCi-N line like this one, and the related CDi (note its just a different order of the same letters, argh!) that includes DSP. These are "install" amps, meant to be set up once and then relied upon for years. This probably explains the Phoenix terminal blocks. You can easily buy a balanced cable, cut off one end, and connect the bare wires to the plug-in header. It's really no big deal. To me they seem to be much better built than, for example, the XLS line of amps from Crown.
I prefer an analog amp, with an outboard DSP and I own one of the higher power versions of the DCi line - the Dci 2-1250. I bought it used for about $1200 IIRC. There is no way I could afford a new one! If you look at the MFG specs for the DCi line of amps you can see that the 300 and 600 models are the lesser cabable members of the line in terms of power, and halve power into 2R. But the 1250 variants seem to offer much more robust PS and amp performance, offering the same rated power into 2R and bridge mode scales as you would expect. I will attach a screen shot from the manual showing the power ratings. Crown guarantees the power 20-20k so you can rely on the amp performing well for subwoofer duties. The PS is universal voltage and offers active PFC. Seems to be very well built. The 1250 W power level (2500W bridged) eclipses Purifi and Hypex offerings if you need higher power levels.
The only real downside to these amps (for "audiophile" use) is the fan(s). There is a fan on the rear of the chassis and one internal fan. It might be possible to replace them with lower noise versions (I opened one amp up to check it out) but I have not done so. They are noticeable but not super loud and seem to cycle on and off (not a variable speed implementation) periodically.