Gear article
Evans Hydraulic Black Drum Head 20"
The Evans Hydraulic Black Drum Head is a specialized dual-ply drum skin featuring a thin layer of oil between layers to dampen overtones. Designed for 20-inch drums, it is renowned for producing a 'fat', deep sound with a significantly shortened sustain and ease of tuning.

Overview and Construction
The Evans Hydraulic Black Drum Head is part of the long-standing Hydraulic series, distinguished by its unique multi-layered design. It consists of two plies of film with a thin layer of oil trapped between them. This specific construction is engineered to suppress high-frequency overtones and control the resonance of the drum shell.
The 20-inch model is typically used for bass drums or large floor toms, offering a durable surface that can withstand heavy play while maintaining a consistent aesthetic with its opaque black finish.
Sonic Characteristics
The primary sonic profile of the Hydraulic Black head is described as 'fat' and deep. Because the internal oil layer acts as a natural dampener, the sustain is noticeably shorter than that of standard single or double-ply heads. This results in a focused, punchy attack that emphasizes the low-end frequencies of the drum.
This 'thuddy' character is highly sought after in genres where a controlled, dry drum sound is required, as it reduces the need for external muffling such as pillows or dampening gels.

Tuning and Ease of Use
One of the most significant advantages of the Hydraulic series is its 'effortless tuning' capability. The oil layer helps the head to seat evenly across the bearing edge, making it less sensitive to minor tension inconsistencies between lugs.
This makes the 20-inch Black Hydraulic head particularly suitable for: * Troublesome drums with bearing edge imperfections. * Drummers with limited experience in fine-tuning. * Recording environments where a quick, controlled sound is necessary without extensive adjustment.
Market Position and Comparison
Within the Evans product line, the Hydraulic series occupies a niche for players who find standard clear or coated heads too resonant. While products like the Evans MS3 are designed for the high-tension demands of marching snares, the Hydraulic Black is built for the kit drummer seeking a vintage, dampened tone.
Compared to alternatives like thin single-ply heads, the Hydraulic Black provides a much darker timbre and significantly more durability. At a typical price point of £54, it sits as a premium spare part for drummers looking to upgrade their 20-inch drum's performance.
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Frequently asked questions
- What is the main feature of the Evans Hydraulic series?
- The defining feature is a thin layer of oil sandwiched between two plies of film. This layer acts as a built-in dampener to reduce overtones and shorten sustain.
- What kind of sound does the 20-inch Hydraulic Black head produce?
- It produces a fat, deep, and short sound. It is designed to emphasize low-end frequencies while providing a punchy attack with minimal ring.
- Is the Evans Hydraulic Black head difficult to tune?
- No, it is marketed for its effortless tuning. The design allows it to produce a quality sound even with minimal tuning experience or on drums that are difficult to tune.
- How many plies does this drum head have?
- The Evans Hydraulic Black is a two-ply drum head. The oil is located between these two layers to provide its signature dampening effect.
- What is the typical price for the 20-inch version in the UK?
- The typical price range for this specific 20-inch model is approximately £54. Prices may vary slightly depending on the retailer and current stock.
- What drum size is this specific head compatible with?
- This specific model is designed for drums with a 20-inch diameter. This typically includes bass drums or very large specialty floor toms.
- Does the black finish affect the sound compared to the clear version?
- While the core 'Hydraulic' technology is the same, the black finish provides a specific aesthetic and a slightly different feel compared to the clear or blue variants. The primary sonic goal remains a short, deep sustain.
- Is this drum head suitable for beginners?
- Yes, it is ideal for drummers with little tuning experience. Its construction helps mask tuning imperfections, making it easier to get a usable sound quickly.
- Can this head be used on 'troublesome' drums?
- Yes, the manufacturer specifically recommends this head for drums that are difficult to tune. The oil-dampened plies help compensate for shell or bearing edge issues.
- What genres of music best suit the Hydraulic Black sound?
- It is ideal for a wide range of styles that benefit from a deep, controlled sound. This includes rock, funk, and R&B where a 'dry' drum tone is often preferred.
- Does this head require additional internal muffling?
- Because it has built-in oil dampening to suppress overtones, many users find they need less additional muffling (like pillows or pads) compared to standard heads.
- Is Evans a well-known brand for drum heads?
- Yes, Evans is a major manufacturer in the 'Parts & spares' category for percussion. They are widely recognized for innovations like the Hydraulic and EMAD series.
