Detail 01
5.5-inch port hole
Big enough to pass a mic through and reach inside for muffling. It also shortens sustain and tightens the low end.

Independent shopping perspective
A 20-inch black front head for a bass drum, with a 5.5-inch port already cut. For miking up without taking a knife to a new head.

Strong match
Consider the trade-offs
What matters in use
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 01
Big enough to pass a mic through and reach inside for muffling. It also shortens sustain and tightens the low end.
Detail 02
No template, no cutting, no ragged edge. The hole is finished from the factory and will not tear at the rim.
Detail 03
Fits a 20-inch bass drum only. Bass heads are sized by shell diameter, not by drum depth.
Detail 04
This is the head the beater does not touch. The pedal side takes a separate batter head.
Detail 05
Solid black rather than see-through. It hides the inside of the drum and any pillow or muffling you have in there.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
The front, facing the audience. The beater strikes the opposite side, which needs a separate bass drum batter head.
Yes. A port lets air escape, so the drum sustains less and sounds tighter and punchier than a fully sealed front head.
A 5.5-inch port clears most standard kick mics. Check your specific mic and clip, since larger shock mounts can be tight.
No. This is cut for a 20-inch shell. A 22-inch drum needs a 22-inch head.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.