gerardsound
Member
  • 6
  • 15
  • 0
Registered since

Aug 8, 2019

Re: Feedback at higher volume

Good reply Chet. Hope we can help some members here!

ST - Pro
Professional Legend
  • 1417
  • 48121
  • 2
Registered since

May 11, 2020

Re: Feedback at higher volume

Hi gerardsound,

Welcome to the Bose Portable PA Community.

Thanks for chiming in.

ST

gerardsound
Member
  • 6
  • 15
  • 0
Registered since

Aug 8, 2019

Re: Feedback at higher volume

Sure, hopefully I can shed some positive light on issues, and I also can learn some meaningful things! 

ChetDude
Participant
  • 239
  • 642
  • 0
Registered since

May 10, 2018

Re: Feedback at higher volume

PS: Also don't forget microphones installed in instruments.

Our biggest feedback problems are not usually our 3 vocal + 1 conga microphones but the microphones installed in our 2 acoustic guitars!

We play one enclosed, smaller space once a week where since I'm closest to the Bose L1S, I have to be very careful about where my guitar is pointing.

Funkifized
Member
  • 2
  • 26
  • 0
Registered since

Aug 9, 2019

Re: Feedback at higher volume

I think the AKG c 535 EB may have been the problem. After better setting of gain, we can get up to about 8 without feedback (and this is in a smaller apartment). 

However, there is however a ferocious Buzz when turned up. Maybe a cable? Or maybe the fact that we've got two mics each into their own vocal processor, keyboard, and drum machine going into the Mackie mixer, into L1?

ST - Pro
Professional Legend
  • 1417
  • 48121
  • 2
Registered since

May 11, 2020

Re: Feedback at higher volume

Hi Funkifized,

Thanks for coming back to tell us how you've managed to improve the feedback problem.

The AKG C535 EB is a beautiful microphone. It's one of my favourites. However, the polar pattern is cardioid and it can be difficult to manage on a live stage.  I replaced it with the Neumann KMS 105 (another great microphone), that is much easier to manage in a live setting because it has a tighter supercardioid polar pattern.  I kept the AKG for lower volume applications and other singers.

Ferocious buzz

Please check out these articles:

Ground Loop

Audio System Noise

ST

Funkifized
Member
  • 2
  • 26
  • 0
Registered since

Aug 9, 2019

Re: Feedback at higher volume

gerardsound posted:

Some recommended mics not to use are Shure SM 58, Beta 87. 

Why the SM58? Shouldn't the unidirectional mic avoid the most feedback?

ChetDude
Participant
  • 239
  • 642
  • 0
Registered since

May 10, 2018

Re: Feedback at higher volume

It's not just the polar pattern.  The SM58 is a supercardioid microphone but has an unfortunate frequency response curve that is more prone to feedback than other microphones we can use.

I also use a KMS105 and it's much less likely to feedback than an SM58.  In fact, my issue is more with the omnidirectional microphone mounted in my guitar than my vocal mic. 

ChetDude
Participant
  • 239
  • 642
  • 0
Registered since

May 10, 2018

Re: Feedback at higher volume

Sorry: KMS105 - tighter pattern with flatter frequency response...

rogueacoustic
Member
  • 5
  • 19
  • 0
Registered since

Dec 26, 2018

Re: Feedback at higher volume

The SM58 is not a supercardioid mic. Straight up cardioid.