Abrahamsen FS401, Owner'S Manual

Installation and operation

7

Unpacking

The loudspeakers are individually packed in boxes that pro-

vide protection during transportation. It is useful to retain the

packaging for future transportation. 

To unpack the loudspeakers their boxes are best laid on 

their backs (smallest long face with a taped seam along its 

middle). Open the front face (smallest long face taped at the 

side). Open all flaps and remove the polystyrene packing. 

Open the cloth bag and lift the loudspeaker out of the box 

and into the initial position shown in figure 1.

Initial setup and positioning

Positioning within a room is often a trial and error process 

with aesthetic as well as practical considerations playing a 

part in the final choices. Following the initial guidelines can 

shorten the process.

The standard setup for a stereo pair within a rectangular 

living room is shown in Figure 1. We recommend positio-

ning the speakers in areas of similar acoustic conditions, on 

either side of the room, with a minimum distance 0.25m to 

the rear and 1m to either side, and facing perpendicular to 

the rear wall i.e. straight ahead with no toe-in. The distance 

from the face of the loudspeakers to the ear of the listener, 

should be at least as large as the distance between the 

loudspeakers.

The loudness of the loudspeakers will depend on the room

construction and furnishings. Strong bass loudness may be

experienced in rooms with heavy/hard constructions

(plastered walls over concrete or brick). To alleviate bass 

excess a bass reflex foam plug is included with the

loudspeaker. This have different flow resistances and pro-

vide damping of the bass amplification provided by the reflex 

port. The plug is placed in the port across the whole cross 

section.

In general, rooms with dry constructions (plaster board and 

wooden floors) have sufficient absorption at low frequencies 

and do not require treatment.