Detail 01
4 in. port diameter
Tight for reaching inside to reposition a mic. Enough for a cable and a compact mic, not comfortable hand access.
Product detailSKU #1274115039832
Bass Drum O'sBass Drum O Port Ring 4 in. Blue
1/6
Independent shopping perspective
The Korena take
A 4-inch blue port hole reinforcement ring for a bass drum front head. For drummers who want a smaller port with a colored accent.
Strong match
Who this is for
- Adding a mic port without a large opening in the head
- Drummers wanting a color accent against a white or clear head
- Finishing the edge of a hand-cut 4-inch hole
Consider the trade-offs
When to look elsewhere
- Drummers running a large-diaphragm mic deep inside the shell
- Anyone whose existing port is already cut larger than 4 inches
- Players who want their hardware finish to stay all-chrome
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
Smaller port vs larger
Vents less air, so the drum keeps more low-end sustain than a 6-inch port would.
Detail 03
Blue finish
Reads as a deliberate accent on a white or clear head. Against a black head it is far less visible.
Detail 04
Ring, not a cut hole
Grips the mylar edge so the cut cannot split outward once the head is under tension.
Detail 05
Head-mounted
No shell drilling. Moves with the head, so it comes off when you change heads.
Final check
Know before you order
- 01Cutting tool is not included — you need a hole cutter or template
- 02Cut slightly under 4 inches so the ring grips the edge
- 03Check your mic body fits a 4-inch opening before committing to the cut
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Will my kick mic fit through 4 inches?
Compact mics and cables pass through. Large-diaphragm bodies and getting a hand inside to reposition are tight. Consider the 6-inch if you adjust placement often.
02Does the hole come pre-cut?
No. You cut the hole in the head yourself, then fit the ring over the edge to protect it. Cut slightly under 4 inches so it grips.
03How does 4 inches compare to 6 inches for sound?
A smaller port vents less air, so the drum holds more sustain and low end. A larger port gives a shorter, tighter attack.
04Can I move it to a different head later?
The ring mounts to the head itself, so it stays with that head. A new head means cutting a new hole and refitting.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Blue
