Le Fantastiche Guide Online di Thomann: Guitar Accessories
10. Feedback suppressors
If you ever play an acoustic guitar through any kind of amplification, you may find these inexpensive rubber circles incredibly useful. By placing the rubber ring inside the sound hole of your guitar, the suppressor will insulate the pickup inside your guitar from the amplified sound coming from your amp or PA system, allowing you to get a lot more volume before the feedback point is reached.