Microphone Basics cont...

Feedback

Feedback is the phenomenon that occurs when an amplified sound from any loudspeaker reenters the sound system through any open microphone and is amplified over and over again. The resulting sound is an annoying howl that (when loud enough) poses a serious threat to not only your speakers, but to your ears as well. Most commonly, feedback is caused by the following conditions:

Placing loudspeakers too close to the microphones.

Having too many open active microphones.

Overemphasis/boosting high-frequency tone controls.

Performing in environments with high ratios of hard and reflective room surfaces.

Overemphasis of effects that generate multiple harmonic repetitions (reverb, echo, delay)

What can you do if feedback occurs before the sound system is loud enough?

Request that the singer/speaker project their voice louder into the microphone allowing for a lower master volume.

Reduce the distance from the talker to the microphone. Each time this distance is halved, the sound system output will increase by 6dB, mainly in the low-frequency range.

Reduce the number of open microphones.

Move the loudspeaker farther away from the microphone.

Move the loudspeaker closer to the listener.

Use an equalizer/feedback reducer to cut the frequency bands in which the feedback occurs.

Microphone Placement and Tone Quality

The VHF-3300 is ideal for close-up vocals and the mic can be handheld or mounted in a mic stand. Keep in mind that microphone technique is largely a matter of personal taste--there is no one "correct" microphone position.

Lead and Backup Vocals

The performer's mouth should be less than 3” from or even touching the windscreen on an axis to the microphone. Doing this creates a robust sound, emphasizes bass and provides maximum isolation from other sources

Speech

For spoken segments in between songs or public speaking types of applications of the VHF-3300, place the mic 4” to 10” away from your mouth, just above nose height for a natural sound with reduced bass. You can also place the microphone 8” to 16” away from the mouth, slightly off to one side, for a more “ambient” sound with greatly reduced bass and minimal “S” or sibilance sounds.

The VHF-3300 & Stage Monitor/P.A.. Loudspeakers

If you will be using the VHF-3300 with stage monitors and/or a P.A.. system, try the following:

Place the stage monitor(s) directly behind the microphones.

Locate the loudspeakers so that they point away from the rear of the microphone. (With the speakers located in these positions, the possibility of feedback is greatly reduced).

Always check the stage setup before a performance to ensure optimum placement of microphone and monitors.

IMPORTANT: Every wireless microphone installation is a unique situation, and can present a variety of problems. Never attempt a live performance without first conducting a test of the system in the performing area. If major changes (additional wireless systems or intercoms, relocation of set up, etc.) have been made since the last test, check the wireless system again--as close to performance time as possible.

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VocoPro owner manual Feedback, Microphone Placement and Tone Quality, VHF-3300 & Stage Monitor/P.A.. Loudspeakers
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VHF-3300 specifications

The VocoPro VHF-3300 is an advanced wireless microphone system designed for performers, speakers, and entertainers seeking professional quality audio without the hassle of cables. This versatile system caters to various environments, from small gatherings and karaoke nights to larger events and professional performances.

One of the standout features of the VHF-3300 is its dual-channel capability, allowing users to connect two handheld microphones simultaneously. This is particularly beneficial for duets, interviews, or workshops where two presenters need to share the stage. Each microphone operates on separate frequencies, ensuring clear communication without interference, making it ideal for diverse applications.

Designed with user convenience in mind, the VHF-3300 features a simple setup process. The system includes a reliable receiver that connects easily to various audio devices. With dual antennae, the receiver provides a broader range and improved signal reception, reducing the likelihood of dropouts or feedback during performances. Additionally, it has a sturdy build quality, making it suitable for both indoor and outdoor usage.

Another significant characteristic of the VocoPro VHF-3300 is its extensive frequency range. The VHF technology offers a reliable and stable signal, which is essential for maintaining audio clarity. Users can adjust the volume levels on individual channels, allowing for precise control over sound output. This flexibility helps cater to different vocal strengths and ensures that all performers can be heard clearly.

The handheld microphones are designed with comfort and usability in mind. They feature a lightweight and ergonomic design, enabling performers to hold them comfortably for extended periods. The microphones are also equipped with high-sensitivity cardioid pickup patterns, which help minimize background noise while focusing on the primary sound source.

Furthermore, the VHF-3300 system includes a low battery indicator on the microphones, ensuring that users are always aware of power levels and can replace batteries before they run out. This feature is particularly useful during vital presentations or performances where any interruption would be detrimental.

In summary, the VocoPro VHF-3300 wireless microphone system is a robust solution for anyone in need of high-quality audio. With its dual-channel capability, user-friendly setup, and reliable performance, it stands out as an excellent choice for both amateur and professional applications. Whether for karaoke, public speaking, or musical performances, the VHF-3300 is engineered to deliver clear and consistent sound, enhancing the overall experience for both performers and audiences alike.
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