Looks like the Dynacord amplifiers you currently have with those subs are your best choice for DJ use with those speakers. As well, it looks like someone may have already sized those amps with those speakers; appears those amps are safe for those speakers; at one speaker per channel.
I got those amps a year or so ago for < $1k each. I've been using them for a much smaller Danley setup and they've been really blowing my mind so far. I acquired them separately from the TH118s.
Before thinking of spending money on big amps... there's a lot to know about a speaker's power rating.
Yes - it doesn't sit right with me at the moment to spend > $5k for a DNA20k amp or similar when I've got the Dynacords, but I don't feel knowledgeable enough to confidently make this call by myself so really appreciate all the comments from everyone here.
For the OP - if your playback includes sustained VLF content you will be surprised at how fast your subs will heat up, and how few Watts it takes to "smell the voice coils." On a popular 2x18 reflex sub, 400-500W was sufficient to have the cabinets dancing around the floor and after 10-20 minutes one could smell the heat at the reflex ports. The "peak rating" was something around 5,000 Watts. There is no doubt in my mind that to apply that much power would result in failed speakers and maybe necessitate a fire extinguisher moment.
DNA20k amps are what a majority TH118 users seem to be using though:
https://www.danleysoundlabs.com/wp-content/uploads/2022/06/DNA-Pro-Specs-v1.4.pdfIt's super hard for me to compare amp specs but the cost is astronomical in comparison to what I paid for the Dynacords.
The Danleys are 4ohm boxes?
Yep! Specs are here
https://www.danleysoundlabs.com/wp-content/uploads/2022/10/TH118-Spec-Sheet-v.202209231214.pdf. The "Recommended Power Amplifier" specs threw me off.