BMC UltraDAC DAC & Headphone Amplifier - Open Box

Special Price $2,750.00 Regular Price $3,990.00
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Save $1,240 on a BMC UltraDAC Dac & headphone amplifier
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Includes Full, Original Warranty

Top-grade Digital / Analog Converter with Current Injection current-to-voltage (I/V) conversion. The UltraDac is a higher grade version of the original, PureDAC by B.M.C. Audio of Germany.

It delivers a digital to analog converter (DAC) of the highest quality, with a balanced preamplifier, a reference-level balanced headphone amplifier, and B.M.C.'s exclusive Digital Intelligent Gain Management (DIGM).  

DIGM is a volume and amplification control system that calibrates gain without dividing or downgrading the input signal.

We test and inspect each open box item to verify condition and ensure optimal sound quality. Items are covered by manufacturer warranty and are guaranteed to work or we'll refund your purchase.

Returns are not accepted on Open Box items.

The Ultradac's balanced preamp is integrated with the DAC's current-to-voltage converter, which converts and filters the DAC's current, eliminating the need for an extra stage. The Preamp and headphone amp both employ B.M.C.'s exclusive Load Effect Free (LEF) technology that handles current demand separately from the voltage demand, and naturally avoids distortions increasing the preamp and amp's quality of its audio reproduction.

It benefits from the same features that made the success of PureDAC but it employs further musical resolution & detail and hard to drive headphones suchas the HiFiMan HE-6 are a piece of cake. 

Separate volume controls for the preamp and the headphone amp come standard. A high-resolution asynchronous USB interface, digital AES/EBU, Toslink and coaxial inputs, balanced analog outputs, RCA output jacks, and a special B.M.C. link for connecting directly to a B.M.C. amplifier are also standard.

The balanced output is ideally compatible with amplifiers featuring BMC's exclusive Current Injection (CI) technology, which enhances signal purity and the musical presence of the PureDAC's audio reproduction. 

The UltraDAC improvements over the PureDAC: 

Top level local clock oscillator with super low phase noise and jitter.

70% larger power supply for perfect stability under all conditions.

New hybrid LEF headphone amplifier with 15A bipolar voltage output devices and MOSFET current sources.

Vastly improved unbalanced standard headphone output with separate stage.

New hybrid LEF line stage with bipolar voltage output devices and MOSFET current sources.

SPDIF inputs with full 192kHz support.

Quiet cabinet with damping.

Operation with fixed line output available.

Top-grade Digital/Analog Converter with Current Injection current-to-voltage (I/V)  conversion

High-resolution asynchronous USB interface up to 32bit/384kHz

USB PCM: 16...32bit; 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384kHz.

DXD support without FIR filtering.


ASIO driver for Windows; Linux and Mac compatible

AES/EBU, coaxial and Toslink digital inputs up to 24bit / 192kHz

Balanced, reference-class headphone amplifier with digital/analog power convertion (DAPC), load-effect free (LEF) technology, 15A bipolar Voltage output devices combined with MOSFET current sources, a super-low impedance LEF output stage, and lossless Digital Intelligent Gain Management (DIGM) volume control.

Balanced LEF, CI-compatible preamp that optionally operates in B.M.C. Mode, with DIGM and bipolar voltage source combines with a DMOS current source and LEF-balanced output stage.

Separate volume controls for the line and headphone sections (the line volume position 59 represents a DAC standard output level)

Second-generation DIGM with optimized gain distribution between power amps and internal and DIGM volume levels

Optical B.M.C. Link for connecting with B.M.C. amps like the PureAmp

Remote Control including PureAmp functions.

Top grade parts like MPP (conductive film polypropylene, non inductive) and balanced current capacitors, precision metal film resistors...

Massive and stylish extruded aluminum chassis

Dimensions: 14.37 x 4.06 x 12.91 inches, W/H/D (365 x 103 x 328 mm)

Weight: 16lbs / 7 kg

Dimensions: 14.37" x 4.06" x 12.91" (WxHxD) (365 x 103 x 328 mm)

Weight: 13.9lbs (6.3 kg)


  • Optional fixed line output level operation
  • Optical BMC link fo connecting with BMC amps like the PureAmp

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