Download the TR-50 Manual and Specifications document (PDF)


The Tram TR-50 - the definitive choice of industry professionals who can't afford to compromise on sound quality.



Tram™ Lavalier Microphone TR-50

When it was introduced, the Tram TR-50 miniature microphone revolutionized the industry - it has become the standard in feature film, televison production and other areas of the entertainment industry. In addition to its diminutive size and superior sound quality, the TR-50 offers a combination of features that are simply not offered by any other microphone. The TR-50 miniature professional lavalier microphone answers the needs of even the most demanding sound recording engineer. It has been designed with the latest electret development and electronics technology to provide high-sound quality with little or no visibility. Its small size and special design make it ideal for a variety of uses and fastening locations - particularly when situations require an unobtrusive appearance and hidden mic use.

The tiny omni-directional capsule features minimum sound coloration and is therfore easily combined with boom-mics during post production. A variety of accessories makes mounting the mic on or under clothing easy, with reliable results.

The extended frequency response range and omni-directional characteristics have been designed to satisfy the most stringent requirements in all professional audio fields, particularly film and TV production.


  • Size: .18" x .300" x .55"
  • Type: Omni-directional Electret condenser
  • Freq. Response: 40 - 16,000 hz
  • Noise level: 26dB equivalent SPL
  • Maximum SPL: 134dB
  • Output level: -57dB
  • Nominal Impedance: 3,000 ohms (TR-79 Power Supply - 250 ohms)
  • Operating Voltage: 1.5V
  • Current Drain: 20-30 microamps (TR-79: 80-100 microamps)
  • Battery: 357 (SR44W/313)
  • Isolated Mic Element: To reduce rubbing noise
  • Bias: Negative and Positive
  • Cable: Sturdy, Flexible - 4 1/2' long (Tr-50PS - 9' long)
  • Available mic color: Black, Gray, Tan, or White

Standard accessories: (included with microphone)

  • Cable holder (CH)
  • Clip on holder (COH)
  • Tie Bar (TB)
  • Tie Tac (TT)
  • Wind Screen (WS)
  • Tape Down (TD)
  • Cable Reel (CR) - PS only
  • Carrying Case (CC)
  • Optional Accessories
  • Boundary Layer Tape Down (BLTD)
  • Double Tie Bar (DTB)
  • Mic Cage (Plain Back) (MC1)
  • Mic Cage (Clip-on Back) (MC2)


The TR50 is available with a variety of connectors (Micro-Mini, Lemo (4, 6 or 8pin), Mini Switchcraft (3, 4 or 5pin), Sony, Sennheiser, etc.) For direct attachment to any wireless microphone transmitter. In addition to its use with wireless transmitters, the TR-50 can be used as a low impedance hard-wired microphone with the TR-79 power supply. 12/48v phantom powering (in addition to internal powering) is available on all TR-50*PS microphones and TR-79+ positive bias power supplies.

The TR79 power supply provides a balanced transformer output to an XLR connector and uses an Eveready 367 battery. The battery compartment is designed to permit only one insertion direction, so the polarity cannot be reversed. This compartment is accessible by turning the black plastic end cap counter clockwise and pulling firmly. The battery is removed by pushing it out with a sharp object through the hole provided in the bottom of’ the compartment.


  • Miniature Electret Condenser Microphone

  • Minimum sound coloration for universal use

  • Easily combined with boom microphones

  • Tiny, lightweight and compact; easily concealed

  • Extensive range of mounting accessories

  • Wide frequency response

  • Very low rubbing noise

  • Internal battery or phantom power (Pos.version)

  • Detachable 250 ohm power supply

  • Available in 4 color: black, gray, white, tan

  • Large range of connectors for direct use on transmitter; fits virtually all wireless transmitters

  • Strong, durable and reliable

  • One-year warranty


Manufacture Warranty

TRAM microphones are warranted to the original purchaser to be free from defects in material and workmanship under normal use for a period of one year from date of purchase. During this one year period, and upon proof of purchase, your TRAM microphone will be repaired or replaced, at TRAM’s option, without charge for either parts or labor, provided the microphone is sent prepaid to TRAM. This warranty will not apply if the microphone has been misused, abused, incorrectly wired or altered. Warranty repair/replacement does not extend this warranty.


TRAM™ Lavalier Microphones
Copyright © All Rights Reserved