Using the ITP
The ITP is a low-noise, transformer-coupled input, phantom-powered inline microphone amplifier. Intended for use with dynamic moving-coil and ribbon microphones, the ITP offers a variable gain range of +20dB to +40dB. The ITP's low phantom voltage and current requirements make it especially suitable for use with portable recorders.
The ITP's electrically balanced, low impedance output enables use of cables up to 300' (100m) without signal degradation. The ITP's gain is not affected by the load impedance of the connected preamp, and the ITP is fully rated into a 600Ω load. The ITP also offers excellent common mode rejection and phantom power supply noise rejection.
The ITP's input transformer blocks phantom power from reaching connected microphones.
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ITP Specifications
Type: inline phantom-powered microphone amplifier with transformer-coupled input
Phantom power: +12V to +48V (headroom reduced below +33V)
Current: 1.1mA
Input Impedance: 2KΩ
Output Impedance: 100Ω
Gain Range: +20dB to +40dB
Maximum Input Level, 1kHz @ 1% THD: -2dBV
Maximum Output Level, 1kHz @ 1% THD: +18dBV
Total Harmonic Distortion, 1kHz @ 0dBV: 0.01%
Total Harmonic Distortion, 100Hz @ 0dBV: 0.1%
Frequency Response, 150Ω source: 30Hz to 20kHz
Equivalent Input Noise, maximum gain: -127dBV unweighted; -130dBA
Common Mode Rejection Ratio: 70dB minimum
Dimensions: 4 7/8" L x 1 1/8" H x 1" W (123mm L x 30mm H x 25mm W)
Weight: 4 oz (116g)
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