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Re: No compromises front loaded double 18” cabYep, just adding to the "clever"...... We know that ports near surfaces, like the internal walls of a cabinet or the even the floor, acoustically appear longer and tune a little lower in freq than expected from just the physical tunnel length. It would appear with the BT218, that the symmetrically adjacent port arrangement in the middle is like having half the cabinet - one driver and one port - against a wall with the port closest to the wall. In this arrangement the effective port length is increased a little. And so for a given tuning, the physical port inside the cabinet can be slightly shorter. This all helps to maximize the port area, whilst minimizing the amount of cabinet volume the port consumes. Someone please correct me if I'm wrong here...
Re: No compromises front loaded double 18” cab
Yep, just adding to the "clever"...... We know that ports near surfaces, like the internal walls of a cabinet or the even the floor, acoustically appear longer and tune a little lower in freq than expected from just the physical tunnel length. It would appear with the BT218, that the symmetrically adjacent port arrangement in the middle is like having half the cabinet - one driver and one port - against a wall with the port closest to the wall. In this arrangement the effective port length is increased a little. And so for a given tuning, the physical port inside the cabinet can be slightly shorter. This all helps to maximize the port area, whilst minimizing the amount of cabinet volume the port consumes. Someone please correct me if I'm wrong here...
