Very efficient, very small FR drivers?

Let's go back to the mini speakers array. First up 4 sets of the 32R 57mm 0.5w drivers. These aren't headphone elements. Interested to see if something new call a near field array is possible
https://www.aliexpress.com/item/1005006260721784.html?spm=a2g0o.cart.0.0.2d8a38da0zVIQB&mp=1

Should total 128R in series array, very close to the 100R optimum specced for the amp. These drivers are on their way. Four drivers very close together is an obvious first test. How about a horn for each?
 
Complete stop!!

I am using the wrong muscle. I already have the 12V DC to tube PSU sorted with a dedicated board. I am using the wrong amp and chasing whisps of performance for lil gain, 'pune' intended 😀

New recipe to nail SOR # 1-10 with style 😀

2.1 channel DSP board with BT, aux in and USB (line in + instrument pre via a summing amp on the aux in)

This amp

DC 12v tube PSU

These FR

Tiny40s sub

DC24v small class d for the sub

DC12v to 24v stepper

12v battery based system

Find a way to strip a sub signal from the stereo amp for the class d sub amp

Any issues jumping out with these? Look guys, every one has a white whale. This is all my white whales in a pod, super pune intended