Ernie Ball Acoustic Guitar Soundhole Cover - Feedback Control

Our review of the Ernie Ball Acoustic Guitar Soundhole Cover finds it best for acoustic and acoustic-electric players who need a simple, reliable way to stop stage and home amp feedback. The single biggest reason to buy is its straightforward effectiveness: a tapered, soft rubber insert that blocks the soundhole and suppresses that piercing screech without tools or alteration to the instrument. Installation is fast and reversible, and the cover is designed for most full-size guitars with a 4 in soundhole, so it suits players who want immediate feedback control and interior protection.

Key Features

• Feedback suppression: The cover significantly reduces unwanted feedback and noise when using an acoustic-electric guitar with a pickup or microphone nearby.
• Fits most 4 in soundholes: The tapered shape from 3.98 in to 4.064 in allows it to seat securely in most full-size acoustic guitar openings.
• No tools required: Installation is fast and reversible, so players can insert or remove it between songs or sets without fuss.
• Non-abrasive rubber: The durable soft rubber material is gentle on the guitar finish and does not scratch or mar the soundhole edge.
• Interior protection: By covering the soundhole the insert helps keep dirt and debris out of the guitar body when not playing amplified.

Who It's For

The Ernie Ball soundhole cover is aimed at gigging acoustic and acoustic-electric players who encounter feedback on stage or in loud rehearsal rooms, and who want a quick, non-permanent solution. It is also useful for home players who sometimes plug in and want to avoid howling when using microphones or pickup systems.

Players with nonstandard soundhole shapes, very small travel acoustics, or guitars where the neck protrudes into the soundhole should look elsewhere, since the design is intended for full-size soundholes roughly 4 in in diameter and does NOT work on guitars with neck protrusion into the opening.

Pros & Cons

Pros

• Effectively suppresses feedback and unwanted noise during amplified playing.
• Tapered soft rubber fits securely and is easy to install or remove without tools.
• Protects the guitar interior from dust and debris while remaining non-abrasive to the finish.
• Generally well regarded for maintaining good sound quality, with some users reporting no bass loss.

Cons

• Fit can be mixed depending on the exact soundhole dimensions and some guitars, such as certain Taylor models, may not seat perfectly.

Specifications

Brand	Ernie Ball
Intended use	Full-size acoustic and acoustic-electric guitars
Soundhole diameter fit	Designed for 4 in soundhole (tapered 3.98 in to 4.064 in)
Material	Durable non-abrasive rubber
Installation	Easy, no tools required
Limitations	Does NOT work on guitars where the neck protrudes into the soundhole

Our Verdict

The Ernie Ball Acoustic Guitar Soundhole Cover is a pragmatic, low-cost accessory for players who need reliable feedback control without modifying their instrument. It offers effective suppression, simple tool-free installation, and a finish-friendly rubber surface, making it a good value for gigging musicians and home players who plug in regularly. Check fit on your specific guitar before buying if your soundhole dimensions are nonstandard.

Frequently Asked Questions

Will this fit my guitar?
It is intended for full-size acoustic guitars with a 4 in soundhole and has a tapered 3.98 in to 4.064 in shape; guitars with neck protrusion into the hole are not compatible.

Does it affect tone or bass response?
Most users report it preserves good sound and some specifically note no noticeable bass loss, though subtle changes can vary by guitar and pickup setup.

Is it safe for my finish?
Yes, the durable rubber is soft and non-abrasive, designed not to scratch or damage the guitar surface when used as intended.