Orders placed after 4PM on weekdays will not ship until the next business day. Orders placed after 11AM Fridays will not ship until the following Monday.
Faster shipping methods may be available; just upgrade during checkout.
*Some exclusions apply.
Enter new zip code to refresh estimated delivery time.
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
Amount of boost varies according to bandwidth selection
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
Number of Channels
1 x XLR (on power supply) Also available via a global 25-pin D-Sub input connector
1 x XLR (on power supply) Also available via a global 25-pin D-Sub output connector
Maximum Input Level
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
Mid-high frequency variable, dependent on boost setting