Evans TT18HB - HYDRAULIC BLUE 18
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Essential Information About the Transparent Hydraulic Drumhead
Essential Information About the Transparent Hydraulic Drumhead
- Two plies that trap a thin layer of oil for a "fat" and controlled sound.
- Sharper attack and enhanced low-end, with naturally reduced sustain.
- Firm feel and stable response, ideal for precise playing.
- High durability to withstand heavy hits and tight tunings.
Manufacturer Information
Evans
https://www.daddario.com
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D'Addario Europe Ltd
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Historical Context and Positioning in the Range
The hydraulic concept was developed in the 1970s to achieve a denser and more controlled sound, highly appreciated in rock, funk, and studio settings. This construction is positioned as a simple and effective solution to limit overtones without adding muffling accessories.
Who This Drum/Instrument Is For
This drumhead is aimed at beginner to advanced drummers seeking quick tuning, a round sound, and immediate control over resonances. Perfect for styles where punch and a solid low end are desired: rock, pop, funk, blues, gospel, and studio recordings.
Features and Innovations
The oil layer between the two plies acts as an internal damper: it focuses the sustain, stabilizes vibration, and highlights the attack. The result: fewer unwanted harmonics, more presence in the low end, and a more "controlled" feel under the stick.
Sound Characteristics
The sound is very warm, with a defined attack and a short, focused sustain. On a snare or toms, it produces a vintage-style "wet" sound that blends easily in a mix and is particularly suited to heavy hits and medium to low tunings.
Technical specifications
| Category | Tom | Diameter | 18 " |
| Head finish | Clear | Color | Blue |
| Shaping | Twin Ply | ||
| Type | hydraulic drumhead | Tone | very warm |
| Structure | two plies | Sustain | very focused |
| Damping | thin layer of oil sandwiched between plies | Feel | firm |
| Finish | clear | Durability | high |
| Attack | defined | ||
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Questions frequently asked
Is the Evans TT18HB suitable for an 18-inch tom?
Its 18-inch diameter is designed for a tom of the same size.
What sound does an 18-inch blue hydraulic head produce?
The two-ply construction with a thin internal oil layer produces a very warm tone. The attack remains defined and the sustain is short, focused on the core of the note.
Does this head limit overtones without using a mute?
The oil layer sandwiched between the two plies provides internal damping. This controls resonances without the need for an added mute accessory. The vibration gains stability, with a more present low end.
For which styles is an 18-inch Hydraulic head intended?
This model suits rock, pop, funk, blues, gospel contexts and studio recording. Its dense response and focused sustain adapt to hard hitting as well as medium to low tunings.
What is the finish of this Evans tom head?
The head features a clear transparent finish with a blue tint and a double-ply construction designed for high durability.
