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
