Grado Signature S550

Grado Signature S550 – Open-Back Audiophile Headphones

The Grado Signature S550 brings the essence of the Signature Line into a refined open-back headphone designed for immersive listening. Built for music lovers who appreciate both technical performance and emotional engagement, it delivers clarity, natural dynamics, and the distinctive openness associated with Grado designs.

Key Features

• Newly Engineered 50 mm Dynamic Driver: Designed for precise detail, natural dynamics, and balanced tonal presentation.
• Open-Back Acoustic Design: Provides spacious soundstage and natural imaging for a more lifelike listening experience.
• Detachable Cable System: Improves flexibility and longevity while allowing easy replacement or custom cable options.
• High Sensitivity Performance: Efficient design delivers strong output even from portable sources.
• Balanced Mini XLR Connection: Supports balanced amplification setups for improved signal integrity.
• Signature Comfort Cushions: B-cushions provide breathable comfort for long listening sessions.

Customer Benefits

The Signature S550 combines Grado’s characteristic immediacy with a refined tonal balance suited for extended listening. Its responsive driver reveals subtle textures in acoustic recordings while maintaining energy for dynamic music. The detachable cable system adds flexibility for different listening setups, making the headphones equally comfortable in dedicated hi-fi systems or high-quality desktop listening environments.

Quick Specs

• Transducer type: Dynamic
• Operating principle: Open-back
• Driver size: 50 mm
• Frequency response: 6 Hz – 44 kHz
• Impedance: 38 Ω
• Sensitivity: 112 dB (1 mW)
• Total harmonic distortion: <0.2% @100 dB
• Driver matching: 0.05 dB
• Headphone connection: 4-pin balanced mini XLR
• Source connection: 3.5 mm with 6.3 mm adapter
• Weight: 335 g

What’s in the Box

• Grado Signature S550 headphones
• Signature Silver detachable cable
• 6.3 mm adapter
• User documentation

Use Cases / Ideal For

Ideal for audiophiles, home hi-fi systems, desktop listening setups, and listeners who prefer open-back headphones for detailed and spacious sound reproduction.

Compatibility

Compatible with headphone amplifiers, hi-fi systems, DACs, and portable players via the included 3.5 mm connection and 6.3 mm adapter. Supports balanced setups through the mini XLR connection.

Pros & Cons

✅ Pros:

• Open-back design with spacious, natural soundstage
• New 50 mm driver tuned for clarity and balance
• Detachable cable system for flexibility
• High sensitivity suitable for various audio sources
• Comfortable cushions for long listening sessions

⚠️ Cons:

• Open-back design leaks sound and is not ideal for noisy environments
• Less isolation compared to closed-back headphones

The Grado Signature S550 delivers an engaging and natural listening experience with the openness and energy that define the brand’s sound.