Tagged With "Feedback"

Blog Post

Feedback / Microphone

ST ·
What is feedback and how does it occur? Feedback occurs when the sound from the loudspeaker (or loudspeakers if a microphone is connected to more than one) is louder at the microphone than the sound of the voice. This fundamental fact is shown in the figure below. Note that in the diagram an L1 system is shown but the same fundamental fact is true for ANY loudspeaker. If you understand this diagram, it is relatively easy to understand how changes in an amplification system and room can...
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Re: How Do I use the T1® Noise Gate to Automatically Mute a Microphone?

Seagullman ·
Easy to follow and understand. That should help a few people to avoid microphone feedback in more difficult situations. Tony
Topic

How Do I use the T1® Noise Gate to Automatically Mute a Microphone?

ST ·
One cause of feedback is open microphones on the stage. You can use the T1 ToneMatch® audio engine Noise Gate to mute (shut down) microphones that are not actively being used. Here's a quick video to show you how to do it. ... more about the T1® ... T1® Videos ST
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High power before feedback?

Garry ·
Good Morning / Afternoon all. Just a question to satisfy my curiosity. Having now tried our L1 Model 2 on a high stage after exchanging from a model 1 "see previous posts" I am curious to know how you can achieve such high levels of volume with this unit behind us on stage? My previous experiences with PA in a band with speakers at the side of the stage are problematic at best. I know it can be down to quality of equipment but that cannot be the whole story. We did a rehearsal last night at...
Blog Post

The Bose L1® Approach and the History Of Amplification

ST ·
The L1 ® approach to amplifying live music is based on the qualities of unamplified music: each musician in control of his or her sound, the ability to hear oneself and each other, and the sound of each voice and instrument coming from its unique location. This video explains the major historical eras of amplification, from the early days of individual instrument amplification to the era of triple systems ( backline , monitors, PA) and the present era that includes the new L1 ® approach. The...
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Re: High power before feedback?

ST ·
Hi Garry, The answers to your questions are in this video. Enjoy. The Bose L1® Approach and the History of Amplification. ST
Topic

Unable to generate enough volume w/o feedback

B&B ·
I've owned an L1 mod II/B1 system for several years for small gigs, and added two F1's recently for larger venues. Used it first indoors in a very large cafeteria, with zero issues - in fact, the sound was incredible, and much-commented on (we use the L1 system as monitor). Yesterday we played an outdoor venue with furthest seating approximately 150 feet from stage. Lots of ambient crowd noise necessitated pumping up the volume, but despite a lot of adjusting, I couldn't get past 12 o'clock...
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Re: Unable to generate enough volume w/o feedback

Nick-at-Bose ·
Hi B&B, With a single T1, L1, and two F1 812s, I would use the T1's Master Out to feed the first F1 812. Then, use the F1 812's output to feed the second F1. Make sure the F1 812s' inputs are set to Line Level Were you using the two F1 812s in front of you, like a traditional PA system? If not, I would place them in front of you and let them do the heavy lifting of producing the volume necessary for the crowd. And then since you're using the L1 as a monitor, you're free to position it in...
Topic

Reduced sound when using Tone match with L1 Compact - need help

ST ·
Hi Ali, Thank you for joining the Community. I noticed your post in the Ask Bose for Help forum. aliwegener posted: Hi there. I'm a singer/guitar player using the Tone Match with the L1 Compact. I cannot get the same volume and clarity in the vocals without feedback when using the Tone Match vs. just connecting my mic directly to the L1 vocal input. Unfortunately, as you add microphones to a PA system your gain-before-feedback goes down. This applies to PA systems in general. I'm using a TRS...
Topic

Establishing mic feedback frequency.

Garry ·
Good Morning / Afternoon all. I have just been looking at the YouTube videos and one that did interest me was using the Parametric EQ. I have read about using the Para EQ to attenuate problem frequencies, this requires you to set the boost to +10db and 0.20 oct. then slowly turn up the volume till just before feedback. Then adjust the frequency control until feedback occurs. Then turn the boost down to -3db (ish) I suppose with some practice this could be a quick method of reducing feedback...
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Re: Establishing mic feedback frequency.

ST ·
Hi Garry, Yes. Using the Tuner is a great way to identify a problem frequency. I've used it with instruments like a guitar or bass. That's easy when you can play the offending note, look at the Tuner and see the frequency. I haven't tried it with a microphone specifically for microphone feedback. Please tell us in more detail how you would do it. Thanks, ST
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