TUBE-TECH PM 1A - Microphone Preamp Module

TUBE-TECH PM 1A - Microphone Preamp Module

TUBE-TECH PM 1A - Microphone Preamp Module

B&H # TUPM1A MFR # PM1A
TUBE-TECH PM 1A - Microphone Preamp Module

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Important Notice: This item is non-cancelable and non-returnable
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Expected availability: 7-14 business days 
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Product Highlights

  • Single Channel
  • Microphone/Instrument Input
  • Variable Microphone Impedance
  • Tube Pre and Output Amplifiers
  • For RM8 Desktop Systems
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  • 1Description

Based on the MP 1A tube microphone preamp from Tube Tech, the PM 1A is a modular version that fits into their RM8 desktop power supply. The preamp also features a DI input and features extremely controlled and transparent sound.

The amplifier consists of a microphone input transformer with a step-up of +10dB, a dual tube preamplifier with 10dB/step coarse gain over a 20dB to 60dB range, augmented by a fine 2dB stepped attenuation of +/- 10dB, providing a total gain range of +10db to 70dB.

The output amplifier features 2 dual tubes in a push-pull configuration and an output transformer. The microphone input is provided with a switchable -20dB pad, selectable input impedance, switchable phase reverse and switchable +48V phantom power.

A Hi-Z direct inject input is unbalanced and placed in the circuit directly after the input transformer. The gain range for the DI input is 0dB to +60dB, with the microphone input disabled when in use. A high pass filter for the microphone and the DI input is switchable between off, 20Hz and 40Hz.

All tube-based push-pull microphone preamplifier in a modular format
Microphone gain available in 2dB (fine) and 10dB (coarse) steps
600/1200/2400Ω selectable microphone impedance
Includes +48V phantom power, phase reversal and 20dB pad
High impedance direct input
Low-cut filter switchable as Off, 20Hz or 40Hz
Utilizing the pad allows the unit to function as a unity gain line amplifier
Overloading the input stage is not possible, while a red LED shows when output clipping is approaching
In the Box
TUBE-TECH PM 1A - Microphone Preamp Module
  • One (1) Year Warranty
  • Table of Contents
    • 1Description
    Number of Channels Single
    Inputs 1 x XLR Microphone (on power supply)
    1 x 1/4" TS phone Instrument (on module front panel)

    Microphone input available via parallel DB25 connector on power supply

    Output 1 x XLR (on power supply)

    Output also available via parallel DB25 connector on power supply

    Phantom Power +48V
    Multi Function DI
    Gain Range +10dB to 70dB
    Maximum Output Level +26dBu
    Frequency Response 5Hz to 60kHz, -3.0dB
    Noise -80dBu, unweighted @ +20dB gain
    -60dBu, unweighted @ +60dB gain
    Power Requirements 19W (available via desktop power supply)
    Dimensions (WxDxH) 1.97 x 8.66 x 6.93" (50 x 220 x 176mm)
    Weight 2 lbs (0.9kg)
    Specialties 600/1200/2400Ω selectable input impedance

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