Detail 01
Hydraulic (oil layer between plies)
The oil damps overtones at the source. Short sustain and a heavy low thump without gels or rings.
Product detailSKU #1274034479444
EvansHydraulic Bass Drum Head - Blue 20 in.
1/2
Independent shopping perspective
The Korena take
Two-ply, oil-filled 20-inch bass drum batter head. For players who want a short, thick, controlled kick sound with no extra muffling.
Strong match
Who this is for
- 20-inch bop or compact kits needing a fat, dead thud
- Studio kick work where ring has to disappear
- Drummers tired of stuffing pillows in the kick
Consider the trade-offs
When to look elsewhere
- Players wanting an open, resonant, long-decay kick tone
- Anyone needing a 22-inch head — this fits 20-inch shells only
- Drummers who want to dial in tone with external muffling
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
20 in.
Head size matches the shell diameter, not the hoop. Measure your bass drum shell edge to edge.
Detail 03
Two-ply construction
Thicker and more durable than single-ply. Takes hard beater impact well but reduces high-end snap.
Detail 04
Blue film
Cosmetic. Reads dark under stage light and hides beater marks better than clear film.
Detail 05
Batter side head
This is the head the pedal strikes. Your front resonant head is a separate purchase.
Final check
Know before you order
- 01One head only — no dampening ring, pillow, or port hole included
- 02Check your shell size; a 22-inch drum needs a 22-inch head
- 03You will need a drum key to seat and tune it evenly
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does this come with a hole for a mic?
No. This is a batter head with no port. Ports are cut into the front resonant head, not the beater side.
02Do I still need a muffling pillow?
Usually not. The oil layer already kills most sustain. Add a light pillow only if you want the sound even shorter.
03Will this fit a 20-inch bass drum with a hoop?
Yes. Head sizes refer to the shell diameter. A 20-inch drum takes this 20-inch head regardless of hoop type.
04Is blue different in sound from clear?
No. The color is film tint only. Sound comes from the two plies and the oil between them.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Blue 20 in.
