Recording Channel

The TUBE-TECH MEC 1A Recording Channel is a one channel recording unit, featuring a microphone preamplifier equalizer and compressor. At the heart of the shelving and bell filters you will find a tube operational amplifier.

The MEC 1A is all tube based except for the power supply. Input and Output have fully floating transformers. All DC voltages are stabilized, except the anode voltage for the output stage.

Product Features

Tube based "three-in-one" recording solution

  • Microphone Preamplifier
    • +20 dB to +70 dB Gain
    • Phantom Power (+48 V)
    • Phase Reverse
    • -20 dB pad
    • Lowcut filter
    • High-impedance DI-input (>1 Mohm) for direct connection of guitar, bass or keyboard
  • Equalizer
    • Three bands
    • 6 Low shelving frequency choices
    • 6 High shelving frequency choices
    • Bell type Mid section with 12 switchable frequencies
    • Variable Q
    • Separate in/out switch
  • Compressor
    • Optical gain reduction element
    • Linkable for stereo applications
    • Variable Attack and Release parameters
    • Ratio 1.5:1 to 10:1
    • Separate in/out switch
  • General
    • Master Output Gain (off to +10 dB)
    • Clickless swap relay (Equalizer <-> Compressor)
    • VU-Meter showing output or compression
    • Frequency response @ -3dB: 5 Hz to 60 kHz
    • Low Noise: < - 85 dBu @ 10 dB gain
    • Gold-plated switches
    • Conductive plastic potentiometers
    • Fully regulated power supply with toroidal transformer

 

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Specifications

  • Impedance
    Input, Mic. Preamp: >1.2 kohm
    Input, DI: 1 Mohm/82pF
    Output: < 60 ohm
  • Frequency response @ -3 dB: 15 Hz to 80 kHz
  • Distortion THD+N @ 40 Hz
    0 dBu: < 0.10 %
    +10 dBu: < 0.10 %
  • Noise Rg=200 ohm
    (Output Gain @   20 dB          60 dB)
    22 Hz-22 kHz: < -82 dBu   < -60 dBu
    CCIR-468-4:   < -72 dBu   < -50 dBu
  • CMRR @ 10 kHz: < -60 dB
  • Max. output @ 1 % THD+N: > +26 dBu
  • Gain
    Mic. Preamp: 20 dB to 70 dB
    DI: 10 dB to 60 dB
  • Compressor
    Ratio: 1.5:1 to 10:1
    Threshold: off to -20 dBu
    Attack: 1 ms to 100 ms
    Release: 60 ms to 2 s
  • Tubes
    ECC 81 3 pcs
    ECC 82 1 pcs
    ECC 83 3 pcs
  • Dimensions
    Height:2 units 88 mm 3.5"
    Width: 483 mm 19.0"
    Depth: 205 mm 8.1"
  • Weight
    Net: 5.5 kg 12.1 lbs.
    Shipping: 6.9 kg 15.2 lbs.
  • Power requirements
    @ 115 V/230 V, 50-60 Hz: 30 W