TUBE-TECH EM1A - Passive EQ Module

TUBE-TECH EM1A - Passive EQ Module

TUBE-TECH EM1A - Passive EQ Module


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Product Highlights

  • 3 Band Pultec Design
  • Tube Based
  • For RM8 Desktop Systems

TUBE-TECH EM1A overview

  • 1Description

The EM 1A from Tube Tech is a modular passive tube equalizer based on the original Pultec design, for use in the company's RM8 tabletop enclosure. The filter has a low frequency boost/attenuate section with 4 selective frequencies, a high frequency boost section with a variable bandwidth and 10 selective frequencies, and a high frequency attenuation section with 3 selective frequencies. The filter is placed directly after the input transformer thus eliminating noise from the amplifier.

The amplifier consists of two tubes (valves) in push-pull configuration (one ECC 83 as the pre-amp and phase splitter, and one ECC 82 as the output stage), and an output transformer. Both input and output are transformer balanced (600Ω) and fully floating. The in/out key switches the filter in and out without clicks, while the amplifier remains in the signal path. A red LED shows when output clipping is approached. The input and output transformers come with a static screen between the primary and secondary wirings.

Passive EQ module for use with the RM8 tabletop enclosure
All tube-based push-pull amplifier
4-position bass frequencies with +14dB boost
4-position bass frequencies with -18dB attenuation
10 high-frequency selections with with variable bandwidth and variable boost 1
3 high-frequency selections with up to -18dB attenuation
No insertion loss
Click-less in/out switch
In the Box
TUBE-TECH EM1A - Passive EQ Module
  • One (1) Year Warranty
  • Table of Contents
    • 1Description

    TUBE-TECH EM1A specs

    Filter Type Passive
    Number of Channels Single
    Inputs 1 x XLR (on power supply)
    Also available via a global 25-pin D-Sub input connector
    Outputs 1 x XLR (on power supply)
    Also available via a global 25-pin D-Sub output connector
    Maximum Input Level +21dBu
    Frequency Bands Low Band:
    20, 30, 60 and 100Hz
    Mid-High Band:
    1, 1.5, 2, 3, 4, 5, 8, 10, 12 and 16kHz
    High Band:
    5, 10, and 20Hz
    Bandwidth Mid-high frequency variable, dependent on boost setting
    Range (Boost/Cut) Variable
    Maximum Output Level +26dBu
    Frequency Response 5Hz to 40kHz, -3.0dB
    Dynamic Range Not specified by manufacturer
    Noise -85dBu, unweighted
    Power Requirements 14W (available via desktop power supply)
    Dimensions (WxDxH) 1.97 x 8.66 x 6.93" (50 x 220 x 176mm)
    Weight 2.2 lbs (1.0kg)
    Specialties Contains 1 ECC 82 and 1 ECC 83 vacuum tubes

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