ENGLISH
Setting Up and Using the Concert IV System
• If you are using a CT4L or CT4G transmitter, set the Mute switch to “Off”
• If you are using an HT4 transmitter, set the Audio switch to “On”
IF YOUR SYSTEM HAS A CR4 RECEIVER, FOLLOW THE INSTRUCTIONS IN THIS PARAGRAPH:
If you are using the HT4 transmitter (or if you are using the CT4L transmitter with a connected lavalier
microphone or headset), speak or sing into the mic at a normal performance level while observing the
CR4 front panel AF Level meter. If you are using the CT4G transmitter with a connected instrument,
play the instrument at normal performance level while observing the CR4 front panel AF Level meter.
If the “100%” (unity gain) segment is lighting steadily, with just occasional higher excursions, the audio
level is correctly set. If not, use the supplied plastic screwdriver to slowly adjust the HT4, CT4L, or CT4G
Level control (trimpot) until the CR4 AF Level meter “100%” (unity gain) segment lights steadily (with
occasional higher excursions). Then slowly raise the CR4 Volume knob to the 2 o’clock position (unity
gain) and set the volume of your amplifier/mixer until the desired level is reached.
IF YOUR SYSTEM HAS A CRND RECEIVER, FOLLOW THE INSTRUCTIONS IN THIS PARAGRAPH.
Begin by setting your amplifier/mixer to a low listening level. If you are using the HT4 transmitter (or if
you are using the CT4L transmitter with a connected lavalier microphone or headset), speak or sing into
the mic at a normal performance level while slowly raising the CRND front panel Volume knob to the
2 o’clock position (unity gain). If you are using the CT4G transmitter with a connected instrument, play
the instrument at normal performance level while slowly raising the CRND front panel Volume knob to the
2 o’clock position. Finally, set the volume of your amplifier/mixer until the desired level is reached.
THIS PARAGRAPH AND ALL SUBSEQUENT ONES APPLY TO ALL CONCERT IV
SYSTEMS. If you are using a CT4L beltpack transmitter equipped with a lavalier
microphone, note that correct lavalier placement is critical to sound quality.
We recommend that you place it as shown in this illustration—as close to your mouth
as possible but off to one side (to minimize nasality) and unobstructed by clothing.
Bear in mind also that
omni microphones (mics which pick up signal from all direc-
tions) are more prone to feedback problems than
unidirectional (cardioid or
supercardioid) ones; in general, you can avoid feedback by taking care not to use
any microphone directly in front of a PA speaker (if this is unavoidable, try using an
equalizer to attenuate those high- or mid-range frequencies which are causing the
feedback “squealing”).
10. If you hear distortion at the desired volume level (or, if you have a CR4 and its
AF Level meter “125%” segment is lighting frequently), first make sure that the gain structure of your
audio system is correctly set (consult the owners manual of your mixer and/or amplifier for details). If it is
and distortion is still present, do the following:
• If you are using an HT4 transmitter, use the supplied plastic screwdriver to turn its Level control
(trimpot) slowly counterclockwise (towards the “Min” position) until the distortion disappears.
• If you are using a CT4L transmitter with connected lavalier microphone or headset, its Level control
has been factory preset to provide optimum level for the particular lavalier or headset model being
used and so no adjustment should be necessary. Any distortion present should therefore simply be a
matter of the microphone being too close to the mouth; try moving it further away. If this does not
solve the problem, use the supplied plastic screwdriver to turn the Level control (trimpot) on the CT4L
slowly counterclockwise until the distortion disappears.
• If you are using a CT4G transmitter with an instrument such as electric guitar or bass, lower the
output level of the instrument until the distortion disappears. Alternatively, you can use the supplied
plastic screwdriver to turn the Level control (trimpot) on the CT4G slowly counterclockwise until the
distortion disappears.
Note that, following this setup procedure, you can always lower the Volume of the CR4 or CRND in order
to attenuate the output signal if necessary.
11. Conversely, if you hear a weak, noisy signal at the desired volume level (or, if you have a CR4 and
its AF Level meter “100%” segment is not being lit), again make sure that the gain structure of your audio
system is correctly set. If it is and the signal coming from the receiver is still weak and/or noisy, do the
following:
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