Pipe dreams and nightmares

What happens if I tuck the motor side of the driver up in the ‘pipe’ further in red (1/3) verses offsetting the front side (1/3) down the pipe (yellow) ?

Is landing on those pressure and/or velocity nodes in different ways loading the driver strangely (red verse yellow verse blue).

I included the (blue) which is driver entries at the closed end and exit end to help explain/inquire

The yellow is particularly saggy between from Fb —-> 5x (300/5(144hz) And Fb is smashed with group delay. Is that section all strange because there’s a halfwave length between the driver inputs ?
 

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Wow! Weird? (I’m dumb/confused )
 

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