Variant 2: Bass+ / without plug (green) For this setting the wall clearance should also be no less than 50 cm (20“). Here the bass range is given a broadband 2 dB boost. In rooms with a poor bass quality this provides a significantly stronger upper bass performance. This option is suitable for rooms with a weak bass like e. g. lofts with large window surfaces or plasterboard walls.
Variant 3: Bass- / with plug (blue) This setting is particularly suitable for a placement close to the wall in smaller rooms. The bass shows a soft roll-off below 100 Hz and goes way deep down. This frequency response compensates the low range overemphasis caused by standing waves or pressure chamber effects and nearby corners and walls. Selecting this option can produce greater midrange clarity.
Variant 4: Bass+ / with plug (grey) The fourth and last option is equally suited for a placement close to the wall. Here the bass shows a steep roll-off below 50 Hz. The sealing plug of the bass reflex port makes the placement rather uncritical, and the low-frequency gain versus the closed variant brings about a forceful performance in medium sized to large rooms. Due to the cut off sub low range, the maximum performance will also be increased by 3 dB which results in a higher peak volume level.
Apart from a mechanical damping through a plastic foam cylinder, the B18 loudspeaker has a bass switch to tweak the bass intensity to the ambient room conditions and your personal listening taste.