Ideally the 5"/12.7 cm diameter tube vent is tuned to Fs, especially if driven with a high output impedance amp, but without knowing. OK, note that some other measurements list a much higher Vas, so bumped the cab's dims to ~300 L just in case. Regardless, while the driver's effective piston area has no bearing on a speaker cab's design 'per se', I know that the 2528's specs aren't even close, so would require a ~ complete redesign, though you could probably get it to work 'after a fashion' with enough EQ and maybe some internal damping but the bottom line is that its compression loaded ~8 ft path-length + room boundary loading is technically too much delay for the 2528's XO point, so you may be very disappointed with the mids reproduction without adding a separate mids system to isolate it above a few hundred Hz at most to keep it out of our acute hearing BW. if we compare a simple reflex alignment to a Model T Ford's beam axle with 'king pin' steering, then a BLH alignment would be more like a fully articulated independent front suspension system, so while they both are designed to traverse uneven terrain, the latter obviously requires a lot more design effort to get right for each type of application and the main reason why so few BLHs perform well 'full-range'.
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