High-End DAC & Preamp with Analog Stereo Input

Preamp

In a modern high-end DAC, the preamp stage plays a prominent role in determining the sound quality and characteristics. AMG DAC preamp features the following designs that gives it a natural, relaxed and analog sound:

• Output stage voltage amplification employing all discrete components.
• Output stage current amplification utilizing a high-speed amplifier design.
• “Current transmitter” has no negative feedback amplifier.

The Heart

As the heart of an audio system, the AMG-DAC supports an extensive number of inputs and formats. Dual ESS Technology 32-bit audio DAC ESS9038Q2M independently decode left and right channels improve channel separation and reducing overall noise. The Vishay professional film MELF resistors provide excellent sound quality.

Other notable features:

• Muses 72320 volume control.
• NuPrime SRC IC chip (co-developed with IC vendor) provides DSP processing where Input signals are up-sampled to megahertz before down converted to the targeted sampling rate with ultra-low jitter and distortion.
• Extension port for Bluetooth receiver and WiFi audio streamer (optional).
• Full microprocessor control with memory retention.
• Supports DSD native playback by ASIO2.1 and DoP method.
• Ultra- low-noise JFETs in the input stage for the lowest possible noise floor.
• Individually adjustable volume on each input for precise level matching of sources.
• Asynchronous transfer mode.

Using Bluetooth and WiFi Audio Receivers and Dongles

NuPrime defined an USB Type-A port to carry S/PDIF data and 5V power for connecting to external wireless audio receiver using just one standard USB cable.

The NuPrime Omnia WR-1, BTR-HD, Stream Mini and Stream Mini DAC wireless receivers have a micro USB port that is compatible this specification. This allow a standard off-the-shelf USB-A to micro USB cable to be used for power for the receiver as well as wireless audio data transfer in S/PDIF format.

Specifications:

Inputs:

• C1: Coaxial input for CD/DVD/BD players, TV and any device with a coaxial source.
• O2: Optical input for CD/DVD/BD players, TV and any device with an optical source.
• U3: USB input for computer (PC/MAC) and for NAS devices.
• E4: Extension port for Bluetooth or WIFI. (Optional)
• A5: Stereo analog for CD/DVD/BD players, TV and any analog source device.
• HE: IIS/DSD Digital input With HDMI cable to transfer IIS and DSD data from NuPrime source devices. Do not connect to the HDMI output of Set Top Box or BD / DVD player.

Note: AMG-DAC does not guarantee that all NAS devices will operate and be compatible due to wide variety of brands and custom specs.

Outputs:

• 1 x Balance XLR Out
• 1 x Stereo RCA Out
• 1 x TRIGGER out
• RCA unbalanced outputs: 2 Vrms
• XLR balanced outputs: 4 Vrms
• High Low Gain = X2
• Frequency Response: 20 Hz – 20 KHz / ±0.3 dB
• S/N ratio > 110 dB
• THD+N: < 0.05%
• Dimensions: (W x H x D): 235 mm x 55 mm x 300 mm
• Weight: 5.5 pounds (2.5 kg)
• Worldwide AC Voltage: 90VAC~130VAC / 210VAC~ 250VAC with Voltage Select Switch
• AC Fuse: Slow-blow, T2.5A, 250VAC

I2S Pin Definition