M 903 Tube Microphone Power Supply (TF39, TF47, TF51, AK-47MkII, AR-51, M16)



Designed and assembled in the USA, this new, compact power supply design provides safe and reliable power in a small footprint. The circuit features premium quality capacitors, improved regulation, and RF suppression. The M 903 has an on-board 3-position polar pattern switch, and will power one AK-47MkII, AR-51, M16, TF39, TF47, or TF51.

7-Pin XLR Pin-out:
1 – B+ (120VDC)
2 – Heater (6VDC)
3 – Polarizing (0/60/120VDC)
4 – Ground
5 – Audio (-)
6 – Audio (+)
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