Not enough specs, and that always worries me. For example:
The 403-EXELL 15"-
"Full range plastic speaker with a single 15 woofer and titanium horn driver. 190 watts RMS. 450 watts peak. Frequency response 40-17 KHz. Sensitivity 112-2dB (1W/1m). 8 ohm woofer with 50oz magnet and a titanium driver with a 1 1/2” voice coil. 27x17x17 35 Lbs."
The fact is that 190 RMS would not be so great for a 15" ( I have 12s that are 300w RMS at 8 ohms, and they aren't super hi end.) The frequency response doesn't knock my socks off either.
Also, speaker mfrs. have a tendency to exaggerate specs a tad, though what's shown above leads me to believe these folks aren't..
They may be OK for a home system, but I wouldn't use them professionally. My humble opinion only.....