Is the NXL44-A-MK2 good without a subwoofer?

It reaches down to 45 Hz, which is enough for speech, vocals and light music. For bass-heavy music at high levels, pair it with a subwoofer and use the DSP presets to cross over.

Does it have Bluetooth or app control?

No. It has no Bluetooth, no app control and no smart speaker features. All tuning is done through the onboard DSP and its presets.

Can I use it as a floor monitor?

The cabinet is designed for install and flown use, and its 90 x 60 degree horn gives wide coverage. Check the monitor-angle and rigging options before buying if floor-monitor use matters to you.

How does it compare with RCF's plastic portable speakers?

It trades portability for output and control. The NXL44-A-MK2 has a larger compression driver, more amplifier power and DSP presets, while RCF's portable models are lighter and easier to carry.

What is FiRPHASE on this speaker?

FiRPHASE is RCF's FIR-based phase correction in the DSP. It is meant to give more coherent sound across the coverage area, especially when several cabinets are used together.