WSM Stereo to Mono Coupler Series - 1/2W Stereo to mono coupling matching transformers.
WSM Stereo to Mono Coupler Series - 1/2W Stereo to mono coupling matching transformers.

EDCOR Electronics Corporation

WSM Stereo to Mono Coupler Series - 1/2W Stereo to mono coupling matching transformers.

Sale price$23.70 USD

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SKU: WSM6400

Output Level:

Output Level

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Specially designed to to couple a stereo line level signal to a mono signal.

Primary (Input)
This is a stereo unbalanced 10K Ohms auxiliary line input. This input is ideal for stereo CD players, tape decks, tuners or other stereo unbalanced auxiliary level inputs.

Secondary (Output)
This is a balanced 600 Ohms, unbalanced 10K Ohms line level or a balanced 1K Ohms microphone level output. This line level is output is ideal for telephone lines. signal processors, amplifiers, or any other units that have a balanced or unbalanced line input. The microphone level output Is good for low level microphones inputs on amplifier and mixers.

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 M6 line grain oriented steel cores. Each unit is hand stacked to assure at least 92% stack.

The Bobbin
Injection molded Nylon 6/6 with the addition of 30%-35% glass fibers. The addition of glass fibers allows a higher heat deflection temperature and it brings the material to a class HB UL temperature classification.

The terminations are 0.187" (3/16") spade terminals. These terminals can be connected with 0.187" (3/16") quick disconnects or can be soldered to.

This unit comes with steel zinc plated channel/frame for mounting with the use of two screws. See dimensional drawing.


Wattage 0.5W
Input Maximum Voltage 10Vrms
Input Stereo Unbalanced Auxiliary Level
Primary (input) Impedance 10K Ω
Output Balanced or Unbalanced Line level or Balanced Mic Level
Secondary (output) Impedance 600 Ω (Balanced)
10K Ω (Unbalanced)
Ω (Balanced Mic. Level)
Winding Configuration Interleave Winding
Frequency Response 20~20K Hz., <1dBu
THD+Noise <0.05% @ 1K Hz.
Frequency Response/THD+Noise Plot WSM6400
Insertion Loss <0.5 dB
Bobbin Material Nylon 6/6 GF-30
Flammability Rating Class HB
Coil Finish Wrapping Polyester Film Electrical Insulating Tape
Core Size
EI50 (0.50" x 0.625")
Core Material M-6 29 ga. grain oriented lamination steel
Secondary Insulation Clear air dry polyester varnish
Termination 0.187" (3/16") quick disconnects spade terminals
Mounting Zinc plated channel/frame
Mounting Orientation Horizontal
Weight 0.4 lbs.
Compliance RoHS & REACH
Dimensional Drawing 15000-EI050-625-18
3D Model (STEP)