MIPRO ACT-50H Handheld Transmitter - Manual (Page 5)

CAUTIONS
1. The ACT-52H has an integrated antenna at the end of the rear
housing (covered by the color protective cap). Performer
should avoid holding the microphone over or near the antenna
section as this will deteriorate transmission efficiency. Severe
deterioration if performer directly covers up the antenna
section with both hands.
2. Many performers tend to hold the microphone by the top
grille. Unfortunately, this position seriously degrades both the
sound quality and directionality of a microphone. Even the
most expensive microphones will have its original sound
quality compromised by this method. Grabbing a microphone
by the grille will isolate the capsule's acoustic resonance
circuit and or change the capsule resonator's frequency. This
results in an inferior performance in both frequency response
and the separation of directionality. In addition, a palm's
sound-focusing effect will tend to strengthen resonances in
certain frequencies and can cause unwanted echo.
3. A proper technique is required for using directional
microphones because the distance between the microphone
and your mouth has a significant impact on sensitivity and
performance. There is an inverse relationship between
microphone sensitivity and the distance from the mouth to the
microphone. Consequently, performers with a ''weaker'' sound
level cannot expect to hold the microphone too far away from
their mouth and compensate by turning up the amplifier
volume to increase the sound level as this can easily cause
echo or feedback. In contrast, performers with a ''louder''
sound level should not hold the microphone too close as this
can easily result in distortion by causing the amplifier system
to be overloaded.
4. Furthermore, a large-diaphragm directional microphone has a
very distinct proximity effect. When the microphone is close to
the mouth, the bass response is strengthened as the distance
gets closer. Therefore, if a performer's sound is insufficient in
bass, they can hold the microphone closer and use the
proximity effect to help compensate for the lower bass level.
Conversely, if a performer's voice is too heavy in the bass
register, increasing the distance between the microphone and
their mouth will decrease the proximity effect and reduce the
bass response, thus making their voice become clearer and
brighter.
5. It is recommended to keep the grille and sponge windscreen
clean to avoid any substance blocking the proximity effect of
the microphone.
Handheld Transmitter Handheld Transmitter
7 8
Disposal
2005-08-13
Dispose of any unusable devices or batteries
responsibly and in accordance with any
applicable regulations.
Disposing of used batteries with domestic
waste is to be avoided!
Batteries/NiCad cells often contain heavy
metals such as cadmium(Cd), mercury(Hg)
and lead(Pb) that makes them unsuitable for
disposal with domestic waste. You may return
spent batteries/accumulators free of charge to
recycling centers or anywhere else
batteries/accumulators are sold.
By doing so, you contribute to the
conservation of our environment!
THIS DEVICE COMPLIES WITH PART74 OF THE FCC RULES
AND RSS-123 ISSUE 2 OF CANADA. OPERATION IS
SUBJECT TO THE FOLLOWING TWO CONDITIONS:
(1) This device may not cause interference.
(2) This device must accept any interference, including
interference that may cause undesired operation of the
device. This equipment complies with FCC RF radiation
exposure limits set forth for an uncontrolled environment.
Le présent appareil est conforme aux CNR d'Industrie
Canada applicables aux appareils radio
exempts de licence. L'exploitation est autorisée aux deux
conditions suivantes :
(1) l'appareil ne doit pas produire de brouillage, et
(2) l'utilisateur de l'appareil doit accepter tout brouillage
radioélectrique subi, même si le brouillage est susceptible
d'en compromettre le fonctionnement.
& IC - ID