Okay I spent hours on making my old thread, but it logged me out, had to relog and lost everything I wrote, so here is the tl;dr, and will answer question (probably would've with my other one.)

I am wanting to build a voice amplifier for my 3m half face respirator, I found 3d models of 3m 6092x series cartridge on thingiverse, I plan to modify for my needs, and use to house all these components if space is willing.

** - optional if not possible

If I went with audio board.
Teensy 4.0
electret microphone
lm358 or 386 (and whatever else is needed for the circuit)
2 watt 8 ohm speaker
3.7 @ 1a+ lipo battery
adafruit powerboost 500 charger
bluetooth module**
sd card (relation if bluetooth is supported)**
10k potentiometer for volume output control

if I went with prop shield LC.
Teensy 3.2-3.6
electret microphone
2 watt 8 ohm speaker
3.7 @ 1a+ lipo battery
adafruit powerboost 500 charger
bluetooth module or esp32**
sd card module (relation if bluetooth is supported)**
10k potentiometer for volume output control

reason for bluetooth is if I can use it to play audio files I have stored on the serial memory or sd card** on the prop shield or audio board.

between choosing either board, parts list isn't that much different. what I am listing is what I intend to buy which ever board I decide on, if I am missing any core components, or if I should consider changing components, please let me know, and I appreciate taking time out of your day to read my thread. Thanks in advance.