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Benchmark Benchmark DAC1 HDR - Stereo Preamplifier With Remote (Silver, 220V)

Benchmark DAC1 HDR - Stereo Preamplifier With Remote (Silver, 220V)

Benchmark DAC1 HDR - Stereo Preamplifier With Remote (Silver, 220V)

B&H # BEDAC1HDRXR2 MFR # 500-14100-302RC
Benchmark Benchmark DAC1 HDR - Stereo Preamplifier With Remote (Silver, 220V)

Benchmark Benchmark DAC1 HDR - Stereo Preamplifier With Remote (Silver, 220V) Back View

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Product Highlights

  • Up To 24-Bit 192 kHz D/A Conversion
  • UltraLock Jitter Attenuation Filter
  • AdvancedUSB Audio Computer Playback
  • HDR-VC Custom Motorized Volume Control
  • HPA2 Headphone Power Amplifier
  • Includes Remote Control
  • Dim and Soft Mute Functions
  • No Driver Required for USB DAC
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Overview
  • 1Description

The Benchmark DAC 1 HDR D/A Converter with USB and X Remote (220 Volt Switch-Silver) is a reference-quality stereo preamplifier, a digital-to-analog converter, a headphone-amplifier, and a computer audio interface. It is designed to minimize distortion and ensure hi-fi listening for audiophiles, recording studios, and mastering engineers. To achieve this, the device utilizes Benchmark's jitter-immune UltraLock clock system that blocks more than 12.5 UI of jitter at 1 kHz. For D/A conversion the device features the AdvancedUSB Audio native 24-bit 96-kHz USB converter technology, which does not require the installation of a driver. It also includes a high-current output stage, selectable headphone gain ranges, and an auto-mute function that silences the main outputs when using headphones.

The device features a remote control built around Benchmark's new high dynamic range volume control system, which uses a custom-built motorized Alps potentiometer to preserve dynamic range in the converter and output stages. The remote control includes a "dim" button that allows you to instantly switch to a reduced volume level, such as when a commercial comes on while watching TV, and then return to the program listening level when the commercials are over. It also features a "soft mute" button that will gradually lower the listening volume to silence when pressed and slowly bring it back to the original listening level when pressed again.

The unit includes Benchmark's HPA2 high-current 0-ohm headphone power amplifier that maintains less than 0.0003% THD+N under a full load while powering two sets of headphones. The front panel features two 1/4" headphone jacks, a combination power and source selector knob, a six-LED status indicator, and a rotary volume control. The back panel features balanced XLR outputs, unbalanced RCA outputs, a 3-position output level switch, a stereo pair of unbalanced analog RCA inputs, a USB input, an optical digital input, three digital coaxial inputs, and the power plug connector.

High Dynamic Range Volume Control
Utilizes a custom-built motorized Alps potentiometer to maintain the dynamic range of the converter and audio output stages while controlling the volume
DAC1 Digital To Analog Conversion System
Provides 2-channels of up to 24-bit 192 kHz digital to analog conversion
Jitter-Immune UltraLock Clock System
Blocks more than 12.5 UI of jitter at 1 1kHz to outperform two-stage PLL jitter filter designs
AdvancedUSB Audio Technology
Supports 24-bit audio up to 96 kHz without installing drivers and utilizes the UltraLock clock system to minimize the effects of jitter
HPA2 Headphone Amplifier
Maintains less than 0.0003% THD+N under a full load while driving two sets of headphones
Selectable Low-Impedance Attenuators
Attenuates XLR outputs by 0, 10, 20, or 30 dB
Low Hum Transformer
Features low radiation toroidal power transformer to significantly reduce line related interference and hum
Voltage Switchable Power Supply
While factory configured for 220 V with the appropriate fuse, the universal power supply can switch between 115 and 230 V when operating the device in different countries
In the Box
Benchmark DAC1 HDR - Stereo Preamplifier With Remote (Silver, 220V)
  • Power Cord
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description
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    Specifications
    Audio Performance
    Sampling Frequencies 44.1 to 96 kHz, 20 to 20 kHz BW, 1 kHz test tone, 0 dBFS = +24 dBu (unless noted)
    Signal to Noise Ratio A-weighted, 0 dBFS: +20 to +29 dBu: 116 dB
    Unweighted, 0 dBFS: +20 to +29 dBu: 114 dB
    A-weighted at Low Gain, 0 dBFS: +9 to +18 dBu: 114 dB
    THD & Noise 1,000 Hz at 0 dBFS: -105 dBFS, -105 dB, 0.00056%
    1,000 Hz at -1 dBFS: -107 dBFS, -106 dB, 0.00050%
    1,000 Hz at -3 dBFS: -110 dBFS, -107 dB, 0.00045%
    20 to 20,000 Hz Test Tone at -3 dBFS: -110 dBFS, -107 dB, 0.00045%
    Frequency Response At FS=96,000 Hz
    20 to 20,000 Hz: ± 0.1 dB
    10,000 Hz: -0.02 dB
    20,000 Hz: -0.20 dB
    40,000 Hz: -0.85 dB
    45,000 Hz: -2.5 dB

    At FS=48,000 Hz
    20 to 20,000 Hz: ± 0.1 dB
    10,000 Hz: -0.02 dB
    20,000 Hz: -0.20 dB
    40,000 Hz: -0.85 dB
    45,000 Hz: -2.5 dB
    Cross Talk 20,000 Hz: -100 dB
    1,000 Hz: -125 dB
    20 Hz: -130 dB
    Jitter Performance Maximum Amplitude of Jitter Induced Sidebands (10,000 Hz, 0 dBFS Test Tone, 12.75 UI Sinusoidal Jitter at 1,000 Hz): <-141 dB
    Spurious Emission Maximum Amplitude of Spurious Tones with 0 dBFS Test Signal: < -126 dB
    Idle Maximum Amplitude of Idle Tones: < -128 dB
    Hum and Noise Maximum Amplitude of AC Line Related Hum and Noise: < -126 dB
    Differential Phase Inter-Channel Differential Phase (Stereo Pair - Any Sample Rate): ± 0.5 degrees at 20,000 Hz

    Inter-Channel Differential Phase (Between DAC HDR Units FS<110,000 Hz): ± 0.5 degrees at 20,000 Hz

    Inter-Channel Differential Phase (Between DAC1 HDR Units FS > 110,000 Hz): ± 4.1 degrees at 20,000 Hz
    Maximum Lock Time 100 ms
    Mute Soft Mute Ramp UP and Down Time: 10 ms
    Mute on Receive Error: Yes
    Mute on Lock Error: Yes
    Mute on Idle Channel: No
    De-Emphasis 50/15 us De-Emphasis Enable: Automatic in consumer mode
    De-Emphasis Method: Digital IIR
    De-Emphasis Supported at: FS = 32,000, 44,100, 48,000, 96,000 Hz
    Group Delay Time Delay - digital input to analog output (function of sample rate) according to Delay = 1.01 ms + (48/Fs) where FS = the sample rate in Hz

    28,000 Hz: 2.72 ms
    32,000 Hz: 2.51 ms
    44,100 Hz: 2.10 ms
    48,000 Hz: 2.01 ms
    88,200 Hz: 1.55 ms
    96,000 Hz: 1.51 ms
    176,400 Hz: 1.28 ms
    192,000 Hz: 1.26 ms
    Analog Audio Inputs
    Number of Inputs 1 (RCA stereo pair - unbalanced)
    Number of Channels 2
    Input Impedance 20,000 Ω
    Maximum Input Level +15 dBu
    Maximum Input At Factory-Set Calibration Levels: +13 dBu
    Blocking DC Blocking Capacitors on Analog Inputs: Yes
    Over-Voltage Transfer Transient and Over-Voltage Protection on Analog Inputs: Series R and diode protection
    Input Capacitance 10 pF
    Gain Range Off to +3.5 dB (RCA in to RCA out)
    Off to +19 dB (RCA in to XLR out)
    Off to +13 dB (RCA in to headphone)
    Input Gain Factory-Set Analog-Input Gain in 'Calibrated' Mode:
    +0.5 dB (RCA in to RCA out)
    -4.0 dB (RCA in to XLR out)
    Digital Audio Inputs
    Number of Inputs 5 (1 USB, 1 Optical, 3 Coaxial)
    Number of Channels 2
    Input Frequency Range 28 to 195,000 Hz (coaxial)
    28 to 96,000 Hz (optical)
    44,100, 48,000, 88,200, and 96,000 Hz (USB)
    Word Length 24 bits
    Input Impedance Digital Input Impedance on Coaxial Input (Jumper Selected): 75 Ω or Hi-Z (bridging)
    Digital Inputs Transformer Coupled Digital Inputs: Yes (coaxial)
    DC Blocking Capacitors on Digital Inputs: Yes (coaxial)
    Transient and Over-Voltage Protection on Digital Inputs: Yes
    Minimum Digital Input Level: 150 mVpp on coaxial
    Jitter Performance 100 to 10,000 Hz: >12.75 UI sine
    20,000 Hz: >3.5 UI sine
    40,000 Hz: >1.2 UI sine
    80,000 Hz: >0.4 UI sine
    90,000 Hz: >0.29 UI sine
    160,000 Hz: >0.25 UI sine
    Jitter Filter Benchmark UltraLock on all inputs
    Balanced Analog Outputs
    Number of Outputs 2
    Output Connector Gold-pin Neutrik male XLR
    Output Impedance 60 Ω (attenuator off)
    425 Ω (attenuator = 10 dB)
    135 Ω (attenuator = 20 dB)
    43 Ω (attenuator = 30 dB)
    Analog Output Clip Point: +30 dBu
    Output Level Control 10-turn trimmers (1 per output)
    Calibration 2 dB / turn
    Output Range At 0 dBFs in 'Calibrated' Mode:
    +9 to +29 dBu (attenuator off)
    -1 to +19 dBu (attenuator = 10 dB)
    -11 to +9 dBu (attenuator = 20 dB)
    -21 to -1 dBu (attenuator = 30 dB)

    Output level range (at 0 dBFS) in 'variable' mode
    Off to +27 dBu (attenuator off)
    Off to +17 dBu (attenuator = 10 dB)
    Off to +7 dBu (attenuator = 20 dB)
    Off to -3 dBu (attenuator = 30 dB)
    Output Level Factory set 'calibrated' output level (0 dBFS); +4 dBu (attenuator = 20 dB)
    Output Level Variation With Sample Rate 44,100 vs 96,000 Hz: < ± 0.006 dB
    Unbalanced Analog I/O
    Number of Outputs 2
    Output Connector RCA
    Output Impedance 30 Ω
    Analog Output Clip point: +13.5 dBu
    Output Level Control Shared with balanced outputs
    Level Range At 0 dBFs in 'Calibrated' Mode: -6 dBu to +13.5 dBu
    Output Level Variation With Sample Rate 44.1 kHz vs 96 kHz: < ± 0.006 dB
    Headphone Output
    Number of Outputs 2
    Output Connector 1/4" TRS with switch on left-hand jack
    Output Impedance < 0.11 Ω
    Level Control Stereo control on front panel
    Level Range Off to +21 dBu
    Maximum Output Current 250 mA
    Overload Protection Current limited at 300 mA, Thermal
    Bandwidth > 500 kHz
    THD + N -106 dB, 0.0005% into 30 Ω at +18 dBU (1.26 W)
    Status Display
    Indicators 6 blue LEDs on front panel
    Selection Single Solid LED: Indicates 'normal' volume mode with selected input

    Single Flashing LED: Signal error on selected input

    All LEDs Solid: Indicates 'Mute' mode

    Five LEDs Solid: Indicates "Dim' mode, with unlit LED indicating selected input

    None: 'OFF' mode or no power
    Power Requirements
    Operating Voltage 110 V Setting: 90 V minimum, 140 V maximum
    220 V Setting: 175 V minimum, 285 V maximum
    Frequency 50 to 60 Hz
    Power 15 W idle at 120 VAC
    16 W typical program at 120 VAC
    Fuses 5 x 20 mm (2 required)
    0.5 A 250 V Slo-Blo type
    Dimensions
    Form Factor 1/2 rack wide, 1 RU high
    Dimension (D x W x H) 8.50 x 9.50 x 1.73" (216.0 x 249.0 x 44.5 mm)

    9.33 x 9.5 x 1.73 (237.0 x 249.0 x 44.5 mm) including connectors but without power cord
    Weight 3.5 lb (1.6 kg)
    Packaging Info
    Box Dimensions (LxWxH) 14.5 x 12.0 x 3.0"

    Benchmark Benchmark DAC1 HDR - Stereo Preamplifier With Remote (Silver, 220V) Review

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