Aphex 120B 1x4 Distribution Amplifier

Aphex 120B 1x4 Distribution Amplifier

Aphex 120B 1x4 Distribution Amplifier

B&H # AP120B MFR # 120B
Aphex 120B 1x4 Distribution Amplifier

Aphex 120B 1x4 Distribution Amplifier Back View

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Product Highlights

  • Multi-Zone Audio or SMPTE Distribution
  • Four Independent Volume Controls
  • High Impedance Inputs Enables Bridging
  • No Ringing or Overshooting
  • Low Impedance Outputs For Long Lines
  • Transformerless Circuits
  • Common-Mode Rejection Circuits
  • Electronically Servo-Balanced Outputs
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Aphex 120B overview

  • 1Description

The Aphex 120B 1x4 Distribution Amplifier is designed for multi-zone installed sound applications such as for restaurants, bars, or multiple rooms in a home. The unit features a single high impedance input and four electronically servo-balanced low impedance outputs. Built with transformerless circuits the amplifiers provide a flat frequency response without overshoot or ringing and can be used for distributing both audio and SMPTE time code.

Each output has its own volume controlled amplifier. The low impedance of the outputs allows for long wire runs and high capacitive loads without loss of stability or frequency response. Balancing the outputs with servos and grounding the unused pin allows each output to be used single-ended without changing the gain setting. For I/O the unit utilizes one 3-pin XLR female input, one 3-pin XLR male thru output for connecting to another device, and four 3-pin XLR male outputs for each amplifier channel.

The input circuit utilizes common-mode rejection to preserve headroom, and the high impedance allows for bridging the input signal with minimal loading. This allows you to drive multiple amplifiers simultaneously from the same source. The front panel of the chassis features the four volume controls and an LED indicator light to show signal presence and clipping. The amplifier can be rack mounted as one unit or in pairs using the available rack mount kit sold separately.

UPC: 693714012010
In the Box
Aphex 120B 1x4 Distribution Amplifier
  • Power Cord
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description

    Aphex 120B specs

    I/O 1 x 3-pin female XLR input
    1 x 3-pin male XLR thru
    4 x 3-pin male XLR output
    Frequency Response 5 to 100,000 Hz
    THD 0.002% at +4 dBm
    0.005% at +20 dBm
    IMD 0.002% at +10 dBm
    Hum and Noise Better than 90 dBm at unity gain
    Input Impedance 100 kΩ, balanced
    Maximum Input Level +25 dBm
    CMRR >60 dB
    Output Impedance 65 Ω
    Maximum Output Level +25 dBm into 600 Ω balanced, +21 dBm unbalanced
    Output Gain +15 dB
    Channel Isolation >70 dB
    Connectors XLR inputs and outputs
    Slew Rate 13 V/uS
    AC Power 100, 120, 220, or 240 VAC at 50 to 60 Hz
    Dimensions (H x W x D) 1.75 x 8.25 x 7.25" (4.45 x 21.00 x 18.40 cm)
    Weight 3.5 lb (1.6 kg)
    Packaging Info
    Package Weight 4.7 lb
    Box Dimensions (LxWxH) 12.2 x 9.2 x 4.3"

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