Audiophilepure

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” This is not the first time I’ve noticed low-end problems with loudspeakers which rely on two closely coupled drivers to cover the bass region. It can sometimes be done successfully by rolling off one of the drivers below the midbass. The problem is one of mutual reinforcement, a phenomenon in which two drivers, mounted in close proximity to each other, mutually reinforce each other’s output across a limited frequency band. This may well be the cause of the problem here.”