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Marantz PHA-3 Portable Stereo Headphone Amplifier

Item # MRZPHA3 (Part # PHA-3)
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Item Description:
  • 3 Independent headphone outputs with individual level controls
  • Rugged aluminum chassis with strap loops for wearing or mounting
  • Dual-color power LED to indicate when 4 hours of battery life remain
  • The PHA-3 Stereo Field Production Headphone Amplifier provides three independent headphone feeds from balanced or unbalanced sources, and can drive headphones to high levels at audiophile quality with low distortion - ideal for field broadcast production companies, portable audio/video production crews, and live sound productions where critical audio monitoring is required, even under high SPL conditions. The PHA3 features a rugged metal case and the ability to daisy-chain additional units utilizing the Loop outputs.

    Product Features:

    • 3 Independent headphone outputs with individual level controls
    • Balanced XLR inputs or 1/4" and 3.5mm stereo inputs
    • 1/4" Loop output for daisy-chaining additional units in series for extra outputs
    • Parallel 3.5mm and 1/4" outputs with two additional 1/4" outputs
    • Internal power (2x AA) or external power (5-17VDC) with seamless power switchover
    • Dual-color power LED. GREEN indicates power with good battery - RED indicates low battery power (LED turns RED when (4) hours of battery life remain)
    • Rugged aluminum chassis with strap loops for wearing or mounting

    Product Specifications:

    • Frequency Response: 10 Hz - 50 kHz (+/- 1.0 dB)
    • Balanced line input: Loop out: -3dB, Headphone outputs: 34dB
    • Unbalanced stereo input: Loop out: -1dB, Headphone output: 35dB
    • Output Clipping Level: +18 dBu minimum with 600 ohms load, +16 dBu minimum with 300 ohms load
    • Input Clipping Level: Line input (XLR): +24dB
    • Impedance: Headphone output 200 ohms, Loop out 200 ohms, Line input (XLR) 22 k ohms, Stereo/Loop in (1/4" / 6.35mm) 9.1k ohms, Stereo/Loop in (1/8" / 3.5mm) 9.1k ohms
    • Dynamic Range: > 120 dB
    • Total Harmonic Distortion (THD) +N: 0.03% max (10 Hz - 22 kHz @ +10 dBu input/output level, 300 ohms load)
    • Internal Voltage Rails: ? 15V regulated
    • Power adapter: 5 - 17 VDC, center-positive coaxial connector (5.5mm outer diameter, 2.1mm inner diameter)
    • Power adapter input voltage: 110 - 120 VAC, 60Hz / 220 - 240 VAC, 50Hz
    • Batteries: 2x AA alkaline batteries (battery life approx. 12 hrs / one set of 75 ohm headphones driven, 8hrs / one set of 56 ohm headphones driven
    • Dimensions: 3.7 x 5.6 x 1.7" (94 x 140 x 43mm)
    • Weight: 1.2 lbs / 0.6 kg
    PHA-3 Headphone Amplifier
    This Kit Includes:

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