M 940S Dual Tube Microphone Power Supply (U47, U48)

Dual Power Supply with 7 pin female Binder connectors for two U47 or U48 microphones with VF14, VF14M or VF14K vacuum tubes.


Out of stock


TELEFUNKEN Elektroakustik’s M 940S power supply utilizes improvements of modern component technology and circuit board design. The 940S power supply is fully regulated, to ensure the microphone will always operate the same, regardless of line voltage variations or location; a drastic improvement over the crude original designs.

TELEFUNKEN Elektroakustik power supplies are hand-built at our headquarters in CT, USA with premium components including Signal Transformers, Nichicon capacitors, Neutrik and Binder connectors, double-thick circuit boards for structural integrity, and a PCB layout made to maximize current handling. These units are built well over-spec to ensure reliability and safe operation for decades. Each power supply is calibrated to the specific microphone system it comes with. They are burned in as a full unit to ensure optimum performance and operation.

7-Pin Binder Pin-out:
1 – Audio (+)
2 – Audio (-)
3 – Ground
4 – Ground
5 – B+ (105VDC)
6 – Ground
7 – Ground


Please note this item is built to order.  An estimated ship date will be provided by our sales team.

Live From the Lab

TELEFUNKEN provides these multitrack audio files for the sole purpose of allowing individuals an opportunity to utilize them for home studio use and for educational purposes only.

No commercial use is permitted.  Any commercial use or reuse is strictly forbidden.

By downloading any track hereunder the user agrees to properly attribute all copyrights and to display the following on any non-commercial reuse of the video and multitrack audio files as follows:

All audio files have been engineered and recorded by TELEFUNKEN Elektroakustik and are presented for educational and demonstrational purposes only.

Live From the Lab

The LIVE FROM THE LAB live music video series is recorded and filmed at TELEFUNKEN Elektroakustik’s facility in South Windsor, CT. Each session is tracked live exclusively with TELEFUNKEN microphones and features unique performances from a variety of local, regional, national, and international artists and ensembles.

The multitrack audio files from these sessions are available for free download via clickable links below the individual performance videos. All audio files are presented in .WAV format and were recorded at 24bit / 48KHz sample rate. They are clearly labeled in the same format with the source listed first (LEAD VOX, ACOUSTIC, PIANO), followed by the microphone used (C12, AR-51, etc) and can be downloaded and imported into your Digital Audio Workstation of choice.

For more additional content please visit livefromthelab.net