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works against each other, and the sound of the two playing together will be lacking
in bass and sound “phasey.” If you suspect the sound is not right, and you cannot
see any markings on the wire, try this simple test:
1. Stand halfway between the loudspeakers.
2. Play some music with the amplifier or radio set to Mono.
3. Listen to the richness of the bass and the loudness of the sound.
4. Turn off the amplifier and reverse the connections on one amplifier channel only.
5. Repeat the listening test with the same volume control setting. When the sound has a
richer bass and is slightly louder, the loudspeakers are working together or “in-phase.”
ACOUSTIC FINE TUNING
Each StageFront Pro LCR loudspeaker features a variable Treble and Bass Controls.
The 1870LCR and 2870LCR models also feature Boundary Gain Compensation and
Pod Level controls located on the front for acoustic fi ne-tuning after placement, as
shown in Figure 7. Adjust these controls as follows:
■ Ensure that the Treble and Midrange controls are set to Flat (0 dB).
■ If a Stagefront Pro LCR is placed in a room with highly reflective surfaces like glass or
tile or the reproduced sound is too bright, set the Treble control to – 3 dB to lower the
high frequency response.
■ Listen to dialog being reproduced on the Stagefront Pro LCR. If you want it more
pronounced, set the Midrange control to up to +3dB to enhance the mid-frequency
response.
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Figure 7. Treble and Midrange
controls for the Pro1770LCR and
Pro2770LCR
Figure 8. Treble, Midrange, Pod Level and Boundary
Compensation controls for Pro1870LCR and Pro2870LCR.