Detail 01
4 in. diameter
A common mic-port size. Big enough to fit a kick mic through, small enough to keep most of the head's resonance.
Product detailSKU #1274115039809
Bass Drum O'sBass Drum O's 4 in. Chrome
1/2
Independent shopping perspective
The Korena take
A 4-inch chrome port ring for a bass drum head. Finishes the hole you cut so the mylar does not tear.
Strong match
Who this is for
- Adding a mic port to a bass drum head
- Cleaning up a hole someone already cut badly
- Drummers who reduce resonance with a ported front head
Consider the trade-offs
When to look elsewhere
- Anyone wanting an unported, fully resonant bass drum
- Drummers unwilling to cut into a new head
- Players needing a port on a snare or tom
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
Chrome finish
Matches chrome hoops and lugs. Shows fingerprints and dust more than a black ring under stage lights.
Detail 03
Port ring, not a head
It installs into a hole you cut in an existing head. It does not replace the head.
Detail 04
Reinforced edge
Keeps the cut mylar from splitting outward under vibration, which is what kills an unfinished port hole.
Final check
Know before you order
- 01You cut the hole yourself — no head or cutting tool included
- 02Measure and center carefully; an off-center port is permanent
- 03Larger ports reduce sustain more. 4 inch is the middle ground
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Do I have to cut my bass drum head?
Yes. This is a finishing ring for a hole you make. Cut it slightly undersized, then the ring seats over the raw edge and holds it.
02Where should I put the port?
Off-center, usually near the bottom edge of the front head, so a mic stand can reach in without fighting the hoop hardware.
03Will a port change my bass drum sound?
It shortens sustain and tightens the note. A 4-inch port is a moderate change — more focused attack, less boom, easier to mic and mix.
04Does this fit any bass drum?
It fits the head, not the drum, so drum size does not matter. You need enough flat head surface to place a 4-inch hole clear of the hoop.
