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Setting Up and Using the Concert IV System
• If you are using an HT4 transmitter, use the supplied plastic screwdriver to turn the Level control
(trimpot) on the transmitter slowly clockwise (towards the “Max” position) until the signal reaches an
acceptable level.
• 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 weakness of signal should therefore simply be
a matter of the microphone being too far from the mouth; try moving it closer. If this does not solve
the problem, use the supplied plastic screwdriver to turn the Level control (trimpot) on the CT4L
slowly clockwise until the signal reaches an acceptable level
• If you are using a CT4G transmitter with an instrument such as electric guitar or bass, raise the
output level of the instrument until a good signal is achieved. Alternatively, use the supplied plastic
screwdriver to turn the Level control (trimpot) on the CT4G slowly clockwise until the signal reaches
an acceptable level.
Note that, following this setup procedure, you can always raise the Volume of the CR4 or CRND in order
to boost the output signal if necessary.
12. Temporarily turn down the level of your mixer/amplifier system and turn off the power to your CT4L,
CT4G or HT4 transmitter, leaving the receiver on. Then restore the previously set level of your
mixer/amplifier. With the transmitter off, the receiver output should be totally silent—if it is, skip ahead to
the next step. If it isn’t (that is, if you hear some noise), you may need to adjust the CR4 or CRND front
panel Squelch control. When the Squelch control is at its minimum setting, the Concert IV system always
provides maximum range without dropout; however, depending upon the particular environment your
system is used in, you may need to reduce that range somewhat in order to eliminate band noise when
the transmitter is turned off. To do so, use the provided screwdriver to rotate the Squelch control
completely counterclockwise (to the “Min” position), then slowly turn it clockwise until the noise
disappears. If no noise is present at any position, leave it at its fully counterclockwise “Min” position
(so as to have the greatest overall range available).
13. When first setting up the Concert IV system in a new environment, it’s always a good idea to do a
walkaround in order to make sure that coverage is provided for your entire performance area.
Accordingly, turn down the level of your audio system and turn on both the CT4L, CT4G or HT4
transmitter and CR4 or CRND receiver. Then, with the transmitter unmuted, restore the level of your
audio system and while speaking, singing, or playing your instrument, walk through the entire area that
will need to be covered. If you have a CR4 receiver, note that, as you do so, the “A” and “B” LEDs on the
front panel occasionally switch on or off, always showing you which antenna is receiving the stronger
signal. The basic rule of thumb for all wireless audio systems is to always try to minimize the distance
between transmitter and receiver as much as possible and also to try to maintain “line of sight” between
the two (that is, the person using the transmitter should be able to see the receiver antennas). The idea
is to ensure that the strongest possible signal is received from all planned transmission points. In fixed
installations such as A/V or corporate conference rooms or for extended range applications (where the
transmitter and receiver are more than 150 feet apart), it may be desirable to angle the antennas
differently from their vertical position (use the supplied Allen wrench to loosen and then retighten the
seating), mount them on the rear of your receiver (using the provided knockouts and a Rear Mount
Antenna Kit available from Samson or your local distributor) or even to remote the receiver antennas
altogether. Remoting can be accomplished by using standard M connectors and low-capacitance coaxial
cabling (50 ohm or better) that is suitable for up to 1 gigaHertz bandwidth usage. The lower the
capacitance of the cable, the further you can remote the antennas.
If you have followed all the steps above and are still experiencing difficulties, call Samson Technical
Support (1-800-372-6766) between 9 AM and 5 PM EST.
NOTE: The Concert IV system is designed to replace the wire that is used in wired microphone systems,
providing a gain ratio of 1 : 1.5. Therefore, when using a mixer that provides low impedance mic inputs,
always connect the CR4 or CRND receiver to those mic inputs as opposed to line-level (high impedance)
inputs. For the same reason, do not connect the receiver directly to the line-level input of signal proces-
sors; to apply effects to the receiver’s output signal, connect signal processors to mixer insert points.
