Q Acoustics Concept Serie Manual Del Propietário página 7

Foam Bung
Concept Series speakers are rear ported and designed to work best with at
least 600 mm of free space behind them. Generally, the closer the speakers
are to the rear wall the more the bass frequencies will be reinforced until
they overwhelm the overall sound. In this instance closing the rear port with
the foam bung will tend to reduce bass, which is useful when domestic
circumstances demand that the Concept 300 is used closer to a rear wall.
Ensure the bungs are fitted snugly into the port without inserting them
too far. You will find the level of bass is reduced but definition and bass
extension is increased. The optimal position of the speakers will only be
found through experimentation and by making small adjustments during
the first few listening sessions.
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