Operating Your Amplifi Er; Monitoring Sound Sources; Listening Safely; Using The Feedback Fi Lter - Radio Shack 32-2055 User Manual

The Basics
operating your amplifi er
1. Start the input sound source.
2. Make sure LEFT and RIGHT volume control on the
front of the amplifi er are set to MIN.
Left Volume
Control
3. Press POWER in to turn on the amplifi er. The blue
light around the power switch and LEFT/RIGHT
volume control will illuminate.
Power
Switch
4. Rotate LEFT and RIGHT volume controls to their
middle positions.
5. One at a time, adjust MIC1, MIC2, MIC3, MIC4/
PHONO, and CD/AUX to the desired volume and
balance.
MIC1
MIC2
MIC3
If you hear feedback after you adjust these controls,
NOTE
turn FEEDBACK FILTER clockwise until the noise
disappears (see "Using the Feedback Filter," p. 23).
6. Adjust LEFT and RIGHT volume controls to the
desired volume level after you fi nd your desired
balance.
Right Volume
Control
MIC4/
PHONO
CD/AUX
FEEDBACK
FILTER
22

monitoring sound sources

To monitor the sound sources, plug a pair of mono or stereo
headphones (not supplied) with a ¼-inch (6.35mm) plug into
the PHONES jack on the front of the amplifi er. Headphones
sometimes make it easier to check and adjust the sound
source's balance.

listening safely

To protect your hearing, follow these guidelines when you
use headphones.
• Set the volume to the lowest setting before you begin
listening. After you begin listening, adjust the volume
to a comfortable level.
• Do not listen at extremely high volume levels.
Extended high-volume listening can lead to
permanent hearing loss.
• Once you set the volume, do not increase it. Over
time, your ears adapt to the volume level, so a volume
level that does not cause discomfort might still
damage your hearing.
using the feedback fi lter
The FEEDBACK FILTER control lets you reduce or eliminate
squeal and other noise caused by feedback. After you adjust
LEFT/RIGHT volume, MIC1, MIC2, MIC3, MIC4/PHONO, and
CD/AUX , turn on the amplifi er and any connected sound
sources. If you hear any feedback, turn FEEDBACK FILTER
clockwise until you reduce or eliminate the feedback.
The FEEDBACK FILTER control decreases feedback
frequencies by up to 12dB. If it does not eliminate
NOTE
the feedback, try using a frequency equalizer to
further decrease the feedback frequencies.
23
Beyond the Basics
PHONES
Jack