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NuPrime AMG PRA

NuPrime AMG PRA

$1,799.00Price
The AMG PRA went beyond being a transparent preamp with 1M Ohm input impedance and the best analog source inputs. A user-selectable 4 stage “Active Low Frequency and Harmonic Gain” control gave it distinctive characteristics to enhance the speaker performance, a world-first in preamp design.
Color: Grey
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  • Description

    The AMG series front panel embodies its spirit. It is milled from a 15mm harden aerospace aluminum alloy using a four-axis CNC machine with a diamond cutter through a 48 steps process. Design elements such as the 3D “floating” logo, the curved surface around the front panel switch, and diamond-cut edge bring the quality of ultra-high-end audio products to the affordable range of the AMG series.

    The design goal for AMG PRA was to deliver a transparent sounding analog preamp with its distinctive characteristics. Several new design concepts were developed and used in the AMG-PRE besides 1MΩ input impedance to achieve the best analog inputs.

    Users of smallish speakers would often detect a distinct drop in bass response with some audio tracks. Instead of a simple “Bass Boost” function that lifts a targeted low-frequency band, a user-selectable 4 stage “Active Low Frequency and Harmonic Gain” control compensates for the lack of bass presence. It achieves some bass extension and a more natural roll-off.

    Additional features such as the 2 stage gain control and invertible phase control increase the compatibility of the AMG-PRA with other power amplifiers.

    Technical Details

     

    The layout of the AMG-PRA takes excellent care in isolating the sensitive audio signals from the power circuitry. The power circuitry comprising of a star topology power and ground layers is built on one board while a separate board houses the pre-amplification circuit. An isolation layer separates these two boards, which further minimizes interference. The effect is a highly transparent sound that is natural and not over etched.

     

    MUSES72320 Highly Linear Volume Control

     

    ONE MEGA ultra-wide bandwidth low noise JFET, single-ended Class A input design and MUSES8920 Op-amp produce harmonics similar to vacuum tube amps, which has a “warm, airy and velvety” sound characteristic.

     

    Non-feedback low-frequency domain Frequency Harmonic Modulation circuit provides minimum phase distortion and tone error.

     

    Inputs and outputs are fully balanced design.

    Front Panel Settings

    Left Toggle Switch: Output Gain

    • Upwards : High Gain
    • Downwards : Low Gain

    Right Toggle Switch: Output Phase

    • Upwards : Phase Invert
    • Downwards : Phase Normal

    Left knob: Loudness Compensation

    • Turn the knob to switch between Loudness Compensation

    Right Knob: Power and Input Selector and Volumes

    • Briefly press for 3 sec to On/Off standby mode
    • Brief press to Input Selector
    • Turn the knob to adjust volume

    AMG Remote Control

  • Specs

    • Frequency Response: 10Hz to 200kHz; +-0 to -0.1dB
    • THD: 0.008 %
    • Input Impedance:
      • Balanced IN: 1M Ohm @ 10 Hz ~ 200 kHz. Rated input voltage 8V.
      • Line IN: 1M Ohm @ 10 Hz ~ 200K Hz.  Rated input voltage 4V.
    • Rated Output Voltage: 2 V (LINE) / 4V (BAL) @ 100 Ohm
    • Volume level 92 is 0dB input = output
    • S/N: 95 dB
    • Loudness Compensation:

      2.2 dB (125 Hz)

      4.5 dB (100 Hz)

      5.3 dB (75 Hz)

    • Gain : 3.2 (High) / 2.1 (Low)
    • Color: Grey
    • Product Dimension:  55 x 235 x 300 mm (H x W x D)
    • Package Dimension: 90 x 430 x 320 mm (H x W x D)
    • Product Weight: 3.5kg
    • Package Weight: 5kg

    Remote Control Code

    CUSTOM CODE 0X06
    — KEY CODE—
    POWER ON / OFF 0X04
    MUTE 0X05
    VOLUME DOWN 0X06
    VOLUME UP 0X02
    CH 1 0X07
    CH 2 0X03
    CH 3 0X09
    CH 4 0X08

    Warranty: 2 years

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