Temperament DM7S 137 Reference-Grade Flat-Head Earbuds

Temperament DM7S 137 Reference-Grade Flat-Head Earbuds

Classic flat-head design meets reference-grade tuning—experience audiophile sound with timeless comfort.

The Temperament DM7S 137 represents the pinnacle of flat-head earbud design, combining reference-grade audio performance with the classic comfort and open soundstage that flat-head enthusiasts cherish. Featuring a precision-tuned 15.4mm dynamic driver with medium-high impedance (137Ω), these earbuds deliver exceptional detail retrieval, natural tonality, and an expansive soundstage that rivals over-ear headphones. Built with premium metal construction and balanced cable connectivity, the DM7S 137 is designed for discerning audiophiles who demand uncompromising sound quality and appreciate the unique characteristics of flat-head earbuds.

Key Features

• Reference-Grade 15.4mm Dynamic Driver: Precision-engineered driver delivers exceptional detail retrieval, natural timbre, and accurate frequency response across the entire audio spectrum from 8Hz to 45kHz.
• Medium-High Impedance (137Ω): Optimized impedance provides excellent control and damping when paired with quality amplifiers, revealing micro-details and dynamic nuances that lower-impedance earbuds miss.
• Classic Flat-Head Design: Time-tested ergonomic shape sits comfortably in the outer ear without insertion, providing fatigue-free listening for hours while maintaining an open, spacious soundstage.
• Premium Metal Construction: Durable metal housing ensures longevity while providing excellent acoustic damping and resonance control for cleaner, more accurate sound reproduction.
• Balanced Cable Connectivity: High-quality detachable balanced cable with interchangeable plugs (3.5mm/2.5mm/4.4mm options) allows flexible pairing with various audio sources and amplifiers.
• Extended Frequency Response: 8Hz-45kHz frequency range captures deep sub-bass and ultra-high frequencies, ensuring full-spectrum audio reproduction for Hi-Res audio formats.
• High Sensitivity (112dB): Efficient design works beautifully with portable DAPs and desktop amplifiers alike, though it truly shines when paired with quality amplification.
• Versatile Application: Perfect for critical listening, gaming, studio monitoring, and enjoying all music genres with reference-quality accuracy.

Technical Specifications

What's in the Box

• Temperament DM7S 137 Flat-Head Earbuds (1 Pair)
• Detachable Balanced Audio Cable (1 Piece)
• Premium Carrying Bag (1 Piece)
• User Manual (1 Copy)

Sound Signature & Performance

The Temperament DM7S 137 delivers a reference-grade sound signature that prioritizes accuracy, naturalness, and musicality:

• Bass: Extended low-frequency response down to 8Hz provides deep, textured bass with excellent control and speed. The 137Ω impedance ensures tight damping and minimal distortion, delivering bass that's impactful yet refined—never bloated or muddy.
• Midrange: Natural, transparent mids with exceptional detail retrieval. Vocals are rendered with lifelike presence and texture, while instruments maintain their authentic timbre. The flat-head design contributes to an open, airy presentation that avoids the congestion common in closed designs.
• Treble: Extended high-frequency response to 45kHz captures all the air and sparkle in your music. Treble is detailed and refined without harshness or sibilance, revealing micro-details and subtle textures that bring recordings to life.
• Soundstage: The open flat-head design creates an exceptionally wide and deep soundstage that rivals over-ear headphones. Imaging is precise with excellent instrument separation and layering, making these earbuds ideal for orchestral music, live recordings, and complex mixes.

Why Choose Flat-Head Earbuds?

Flat-head earbuds offer unique advantages that audiophiles appreciate:

• Open Soundstage: The non-insertion design creates a more natural, speaker-like presentation with exceptional width and depth.
• Comfort: No ear canal insertion means fatigue-free listening for hours without pressure or discomfort.
• Natural Sound: Less acoustic interference from ear canal resonances results in more accurate, natural tonality.
• Hygiene: Easier to keep clean and share compared to in-ear monitors.
• Situational Awareness: Open design allows you to remain aware of your surroundings—ideal for home listening and safe outdoor use.

Amplification Recommendations

With 137Ω impedance, the DM7S 137 benefits significantly from quality amplification:

• Portable DAPs: Works well with mid-to-high-end digital audio players with sufficient output power (FiiO M11 Plus, HiBy R6 Pro II, etc.)
• Desktop Amplifiers: Truly shines when paired with dedicated headphone amplifiers (Schiit Magni, JDS Labs Atom, FiiO K9 Pro, etc.)
• Balanced Output: Take advantage of the balanced cable for improved channel separation and lower noise floor when using balanced-capable sources.
• Not Recommended: Smartphone headphone jacks or low-power sources—these earbuds require adequate amplification to perform at their best.