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  • QLS MUB5 - Titanium
  • QLS MUB5 - Rose Gold

QLS MUB5

Reference-Grade R2R Portable DAC & Headphone Amplifier

  • 19+5 sectional R2R decoding – precision ladder DAC architecture
  • LTC6655 instrumentation-grade voltage reference – ultra-low noise performance
  • QA661 crystal oscillator – high-accuracy clocking
  • 20 independent power supply groups – stable and isolated power delivery
Titanium
Rose Gold
Titanium - New, Unsealed - Full Warranty
Regular price $1,757.00
Sale price $1,757.00 Regular price
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QLS MUB5

QLS MUB5

Quloos MUB 5

Reference-Grade R2R Portable DAC & Headphone Amplifier

Featuring 19+5-stage R2R decoding powered by the LTC6655 instrument-grade voltage reference,

This portable unit delivers precision and musicality at the highest level. A QA661 crystal oscillator ensures ultra-low jitter performance, while 178 hand-matched 0.01% / 10ppm resistors guarantee accuracy in every note.

The signal path is enhanced by the renowned OPA627 buffer and a discrete headphone amplifier built around FZT power transistors, offering both power and refinement. A 120-step hybrid volume control allows precise adjustments without compromising dynamics.

Designed for purity, it incorporates NDCS shielding and 20 independent power supply circuits, ensuring noise-free operation across its versatile inputs: Coaxial, Optical, USB, and Bluetooth.

Product Specifications

Core Specifications

  • ≈ 138 × 80.5 × 23 mm

  • ≈ 360 g

  • USB Type-C, RCA Coaxial, Optical, 3.5 mm Line-In, Bluetooth

  • 3.5 mm Single-ended / 4.4 mm Balanced (switchable PO/LO)

  • In-house developed discrete R2R DAC

  • OPA627

  • FZT power transistor fully discrete headphone amp

Digital & Bluetooth

  • Bluetooth 5.0, LDAC, APTX, APTX-HD, AAC, SBC

  • Unidirectional, MUB5 as Bluetooth receiving terminal

  • UAC1.0 / UAC2.0, supports Windows, Mac, Android, iOS

  • Up to PCM 32-bit 384 kHz, DSD512

  • Up to PCM 24-bit 192 kHz, DSD64 (DoP)

Performance

  • ≤ 2.6 V rms

  • BAL 4 V & SE 2 V
    BAL 2.8 V & SE 1.4 V
    BAL 2 V & SE 1 V
    Output ADJ (adjustable)

  • 20 Hz – 20 kHz (±0.5 dB)

  • 0.003% (Balanced & Single-ended)

  • 116 dB (Balanced & Single-ended)

  • 112 dB (Balanced & Single-ended)

  • 104 dB (Balanced & Single-ended)

  • 93 dB (Balanced), 64 dB (Single-ended)

Output Levels (Vrms)

  • 5.5 V rms (BAL) / 2.5 V rms (SE)

  • 2.7 V rms (BAL) / 1.1 V rms (SE)

  • 7.0 V rms (BAL) / 4.0 V rms (SE)

Output Power

  • 1500 mW + 1500 mW @ 32Ω (BAL, instantaneous)
    500 mW + 500 mW @ 32Ω (SE, instantaneous)
    320 mW + 320 mW @ 300Ω (BAL, sustained)
    80 mW + 80 mW @ 300Ω (SE, sustained)

  • 2500 mW + 2500 mW @ 32Ω (BAL, instantaneous)
    900 mW + 900 mW @ 32Ω (SE, instantaneous)
    530 mW + 530 mW @ 300Ω (BAL, sustained)
    120 mW + 120 mW @ 300Ω (SE, sustained)

Other Specs

  • <1Ω (Balanced), <2Ω (Single-ended)

  • 8Ω – 600Ω

  • ≈ 8 hours (HPA=PSV≠6V, 16-bit/44.1 kHz playback, DM7Ti earphones, auto screen off)

  • ≈ 4–5h (Type-C slow), ≈ 3h (Type-C fast), ≈ 3h (DC 12V ≥2A)

  • Type-C (supports fast charge): 5V ≥ 2A, 12V ≥ 1A (QC2.0)
    DC 12V Input (recommended): 12V ≥ 2A (fast charge, compatible with 5–21V stable supplies, fixed polarity)

  • Type-C charger (phone charger), DC12V ≥2A power adapter / cable

Packaging

  • ≈ 190 × 155 × 65 mm

  • ≈ 850 g

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