HMX Bad Sweetheart Linear Switches

The HMX BAD SWEETHEART LINEAR is a mechanical keyboard switch designed for enthusiasts seeking a deep, resonant sound profile and smooth linear action. Engineered by Rena Lab, this switch incorporates innovative materials and design choices to deliver a unique typing experience distinct from typical HMX switches.

Sound Profile

This switch stands out for its exceptionally deep and "thocky" sound. The combination of a T5 UPE blend stem, spherical stem tip, and a newly developed P4 bottom housing results in a rich, satisfying acoustic signature. The P4 bottom housing is formulated with minimal fiberglass content, effectively reducing clackiness and enhancing the depth of each keystroke. This makes it an excellent choice for users who appreciate a pronounced, yet not muted, typing sound.

• Deep and resonant sound
• Reduced clackiness due to low fiberglass P4 bottom housing
• Distinct from traditional HMX switch acoustics

Switch Construction

The switch features a linear actuation, ensuring a smooth and consistent keystroke from top to bottom. Its construction utilizes premium materials and thoughtful engineering to optimize both feel and durability.

• Stem: T5 UPE blend with a large spherical tip for enhanced sound and smoothness
• Top Housing: PA12 for structural integrity
• Bottom Housing: P4 material with minimal fiberglass for a deeper tone
• Spring: 22mm KOS single-stage extended spring for a balanced and responsive return
• Factory Lubed: Pre-lubed with a mix of GPL105 and GPL205 on critical contact points for reduced friction and noise

Performance Specifications

The keyboard switch is designed for both comfort and performance, making it suitable for a wide range of typing styles and preferences.

• Switch Type: Linear
• Operating Force: 45±2g
• Bottom-out Force: 50±2g
• Pre-travel Distance: 2.0mm
• Total Travel Distance: 3.8±0.2mm

Design and Engineering

Developed by Rena Lab and manufactured by HMX, this switch showcases a new mold and advanced materials. The large spherical stem tip and the innovative housing design contribute to its unique sound and feel, setting it apart from other linear switches on the market.

• Designed by Rena Lab
• Manufactured by HMX
• New mold for improved performance and acoustics

Factory Lubrication

Each switch is factory-lubed with a blend of GPL105 and GPL205 lubricants. Lubrication is applied to the leaf spring, stem feet, and bottom housing rails, ensuring smooth keypresses and minimizing unwanted noise.

• Pre-lubed for optimal smoothness
• Consistent feel across all switches
• Reduces friction and enhances durability

Summary of Features

• Deep, thocky linear sound profile
• Innovative P4 bottom housing with minimal fiberglass
• T5 UPE blend stem with spherical tip
• 22mm extended spring for responsive action
• Factory-lubed for smooth performance
• Designed for enthusiasts who appreciate unique acoustics and feel

The BAD SWEETHEART LINEAR switch is an excellent option for those seeking a distinctive, deep-sounding, and smooth linear switch for their mechanical keyboard builds.