Your speaker photos really are too close to show much of anything, and the best option is to look at the rear where they connect to the speaker cables, and / or see if you can remove the Grills to find out something there. There could easily be a Plate Amplifier on the rear of the Subwoofer which should have some info on it.
Your first post said: "He received two CIaudio d100 amps and volume control"
I don't know what you mean about Volume Control. Is there another component? If so I assume it's a Pre-Amp. These Amps need a Pre-Amp to supply a controlled signal to them, so they can amplify it and send that onto the speakers.
Please provide all details you have so we can assist.
