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Edcor RMX1

76,92 €
(64,64 € excl. vat)
including VAT., plus shipping
  • In stock!
  • Stock: More than 10 available
  • Shipping time: 1 - 2 workdays
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Item no.
Product weight
  • 0,02 kg
Shipping weight
  • 0,05 kg

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Ribbon Microphone Transformer 1:37 ratio
Pri DC-4 <0.4 Ohm, Pri Z < 0.4 Ohm
Freq. 20~20KHz
RoHS Compliant

Mathematical and design analysis of the highly successful 1953 RCA ribbon microphone transformer together with new materials offer a new standard.

Magnet Wire
All units are wound with the finest virgin copper magnet wire. All windings use heavy insulated wire to provide excellent manufacturing yield, lower customer cost and superior life.

The Core
EDCOR uses the finest Super "Q" 80% Nickel cores. Each unit is hand stacked to assure at least 92% stack.

The Bobbins
EDCOR's royal blue bobbin with black finishing tape.

This unit has color coded 4", UL1007, 24 ga. lead wire.

pdf rmx1  RMX1 Manual
pdf rmx1  Frequency Response/THD+N Plot
pdf rmx1  Drawing 15000-EI025-025-R01.pdf
pdf rmx1  Drawing 15000-EI025-025-R01.dwg
pdf rmx1  Drawing 15000-EI025-025-R01.dxf

Turns Ratio 1:37
Primary (input) DCR <0.4 Ohms
Primary (input) Inductance <1H
Secondary (output) DCR 87 Ohms
Measures 26mm x 19mm x 18mm (L x W x H)
Secondary (output) Inductance 6H
Frequency Response 50~20K Hz., <1dBu
THD+Noise <0.02% @ 1K Hz.
Copper Shielding Yes
Bobbin Material Glass Filled Nylon 6/6
Flamability Rating Class B 130°C
Core Material Super Q 80 Nickel (80%)
Termination UL1007, 24 ga. lead wire
Weight 0.08 lbs.
Compliance RoHS & REACH


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Ratings from users

  • 5 Stars: 50% (1)
  • 4 Stars: 0% (0)
  • 3 Stars: 0% (0)
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Average product review: Average Rating: 5/55

(This product has got 2 Reviews| View more ratings in other languages)

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  1. Average Rating: 5/55 Lars M. Wrote at 13.04.2020
    Great transformer for a ribbon mic!
    I just made my first ribbon mic from scratch. I gutted an old cheapish condenser mic and used the housing. The transformer fits perfectly and sounds great! Great lows, transparant mids and sweet highs.
    If you want to upgrade your Chinese ribbon mic? This thing would help you a big step in the right direction.
    Don Audio is great; fast shipping, and one of the very few that sells this kind of stuff.
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