Best means of reducing acoustic bass feedback?

[JohnDaBass]

Played a small garden BBQ and later a cafe gig (40ish) yesterday with my newly acquired Fender Kingman 2 SS bass.

Bass >Zoom B1FOUR (HPF@30hz)>Bam 200 combo 6ins speaker.

BBQ gig was fine but I suffered with significant acoustic feedback in the cafe.

Adjusted the Notch filter and the phase switch on the Fender badged Fishman pre but couldn't tame the feedback.

Do sound hole plugs really work?

Anyone with any solutions?

 

Edited 3 hours ago by JohnDaBass

[JPJ]

Yes, sound hole plugs work. Take a leaf out of the double bass players book who use F hole blockers to reduce feedback on loud or difficult stages. Also, bring that HPF up to about 60hz. 
I played a gig yesterday with my acoustic double bass on a very resonant (I.e. empty wooden box) stage. The whole gig I was on the verge of run away feedback and playing open strings was an absolute no no. Sometimes you just have to modify your technique to suit the circumstances of the gig.