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Recently I inherited a transmission line cabinet from a friend; well made, and sturdy, and I have since decided to redesign it so that the 8″ driver is facing forward instead of up. Unfortunately, the interior was designed for an up-driver. I have attached a crude cross-section of its partitions and some dimensions.

First question: are the interior dimensions suitable for an 8″ driver that has an Fs of 47.7 HZ and a Qts of .4625?

And secondly (and most important) will having a 6″ gap between the top of the main (slanted partition) directly behind the driver, and the top the cabinet work as the first chamber? Or will that chamber have to be redesigned? If so, how? Please see attached.

Thanks in advance.