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3. Stand so you are the same distance from each speaker and listen to the rich-
ness of the bass and the loudness of the sound.
4. Turn off the amplifier and reverse the connections on one speaker only.
5. Repeat the listening test with the same setting of the volume control. When
the sound has a richer bass and is slightly louder the speakers are working
together or “in-phase”.
Final Adjustments
1. After checking that the speaker is in phase and works correctly, angle the
speaker for the best sound.
2. Tighten the bracket knobs using only your hands. Use of any power tools
may over-tighten the knob, and strip the threads of the insert.
3. Check that the entire installation is safe and secure.
OPERATION
Listening at Higher Volumes
Outdoors there are no walls to reflect and contain the sound. It requires more
power to achieve a reasonable volume of sound outside than it does when you
are indoors. You also frequently find yourself very far from the speaker. It is
possible to turn the volume so high that the amplifier runs out of power. This
creates “clipping” distortion.
Clipping distortion makes treble sound very harsh and unmusical. When you
hear harsh sounding treble from any good speaker indoors or outdoors, turn the
volume down immediately! Those harsh sounds are masking some much more
powerful ultra-high-frequency sound spikes which will quickly damage any
fine loudspeaker.
Cleaning
You can clean the OS-20's with a dampened soft cloth or paper towel. If the
speaker is mounted high up on a wall or ceiling, use a broom to gently brush it
off. Hosing off the speaker is not recommended, as the tweeter is a precise
mechanism which might be damaged by a high pressure stream of water.
INSTALLATION
OPERATION
1817