Detail 01
4 in. port size
Fits a standard mic port. Big enough for a kick mic to sit inside, small enough to keep some resonance.
Product detailSKU #1274115039785
Bass Drum O'sBass Drum O Port Ring 4 in. Brass
1/6
Independent shopping perspective
The Korena take
A 4-inch brass port ring that finishes a hole cut in a bass drum resonant head. For drummers who have already cut, or plan to cut, a port.
Strong match
Who this is for
- Drummers cutting a mic port in a resonant bass drum head
- Cleaning up a ragged hand-cut hole that keeps fraying
- Adding a metal accent to the front head
Consider the trade-offs
When to look elsewhere
- Drummers who do not want to cut their head
- Anyone needing a port larger than 4 inches
- Players wanting less bass drum ring or sustain control
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Brass construction
Metal ring holds its shape and edge over time rather than deforming like a plastic snap ring.
Detail 03
Ring, not a hole saw
It trims and reinforces the hole. You still have to cut the head yourself.
Detail 04
Fits the resonant (front) head
Ports the front head for mic access and slightly less internal air pressure, shortening bass drum sustain.
Final check
Know before you order
- 01Cutting the head is permanent. Measure and center before you cut.
- 02Head, mic and mounting hardware are not included.
- 03Off-center ports are common; place it low and off-center for mic clearance.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does this cut the hole for me?
No. You cut a 4-inch hole in the resonant head first, then the ring finishes and reinforces the edge.
02Which head does it go on?
The front resonant head. Cutting the batter head would change how the drum feels under the pedal.
03Will this change my bass drum sound?
The port does. Venting the front head lets air escape, which shortens sustain and tightens the note. The ring itself is just trim.
04Can I remove it later?
The ring comes off, but the hole in the head stays. Replacing the head is the only way back to a solid front.
