open baffle standard mounting vs slot loaded?

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Audiobahn ABB122J 800W RMS, Dual 12-Inch Slot Ported Loaded Subwoofer Enclosure : : Electronics

headphone, subwoofer Dimensions : x 34 x 34cm Do you prefer slot-loading or a disc tray? Does it have a display I wonder if anyone has compared conventional open baffle, with the opening roughly the same size as the speaker cone, with slot loading using

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