TRAM® TR50 Lavalier Microphone
When it was introduced, the TRAM® TR50 miniature microphone revolutionized the
industry- it has become the standard in feature film, television 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 TRAM® TR50 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 unique design permit a
variety of uses and fastening options, that make it ideal for unobtrusive
appearance and hidden mic use. The tiny omni-directional capsule features
minimum sound coloration and is therefore 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.
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 357 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.
- TR50 Lavalier Mic Features:
- 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 12-48V phantom power* (*with positive bias version
- Detachable 250 Q power supply
- Available in 4 colors: black, gray, white, tan
- Large range of connectors for direct use on a wireless transmitter
- Strong, durable and reliable
- One-year warranty
- TR50 Specifications:
- 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: 3,000Ω (TR-79 Power Supply - 250Ω)
- 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 (TR-50BPS – 9 ft. long)
- Available mic colors: Black, Gray, Tan, or White
- TR50 Standard Accessories included with microphone (replace * with
- Cable Holder with Vampire Pins (*CH)
- Clip on Holder with Vampire Pins (*COH)
- Tie Bar with Alligator Clip (*TB)
- Tie Tac (*TT)
- Windscreen (*WS)
- Tape Down (*TD)
- Carrying Case (*CC)
- Cable Reel (*CR) - PS versions only
When using the Clip On and Tape Down Holders under clothing, mount the
mic with the back out (facing clothing), as the back of the microphone
housing has less rubbing noise than the front grid. There will be no
reduction in audio sensitivity. These accessories are available in Black,
Gray, Tan or white.
- TR50 Optional Accessories:
- Boundary Layer Tape Down (BLTD)
- Double Tie Bar (BDTB)
- Mic Cage with Plain Back (MC1)
- Mic Cage with Vampire Pin Back (MC2)
TR79 Power Supply
Provides powering and balanced XLR output to the TR50 miniature microphone.
Available in two powering configurations (microphone bias must match power
Negative bias, operates on internal battery only
Positive bias, operates on internal battery or external 12-48V phantom
Connection between the TR50 and TR79 is through a connector of choice (from
an extensive list), matching the connector used by an accompanying wireless
transmitter if required.
- TR79 Features:
- Tube-style power supply for TR50 mic
- Single Mallory RM675 or equivalent battery
- Balanced output on XLR connector
- 18mm x 85mm
- Output impedance 250Ω
TR79ML Detachable Power Supply With TB5M Connector For
TRAM TR50 Mics Wired For Lectrosonics
TR79 Power Supply Hard-Wired To
TRAM TR50B Lavalier Mic
Positive Bias or Negative Bias? What's the Difference?
This is an extremely popular question.
Click Here for the answer.
There are are generally 3 types of repairs with
- Cable is intermittent at the connector end of the mic (or where the
cable enters the power supply on a hard-wired mic). This is by far
the most common problem. The solution is to cut the cable back about
1 inch from the connector and re-install connector. We provide this
service for $41 plus shipping with a turn-a-round of a couple of days ($50
shipping for hard-wired mics to rebutt the cable where it enters the power
supply). We can also replace the connector if it is damaged at that
time- connector costs vary from connector to connector. To send us
the mic for repair, please complete our
Cable is intermittent (or frayed or pulled out) where it enters the mic head (mic element).
can not be fixed. Any problem with or near the mic head (mic
element) can not be repaired. The housing is assembled by a machine
at the factory and therefore is not serviceable. Your only solution
is to purchase a new mic. We offer the
mic only with no
case and no clips, and with or without a connector at a lower cost.
For mics that are hard wired into the power supply, we can
install a new mic head/cable assembly onto your old power supply (the approximate cost to replace a hardwired mic with a new head/cable
assembly is ~$225 and you can send it to us using our
- Power Supply
- Power Supply is dead. First make sure you test the power supply
with another known "good" mic. Second, make sure the bias of the
microphone is the same as the power supply (See FAQs
above about Bias). Third, make sure you are using a "good" battery.
It is very rare that we see a bad power supply and the cause of the
fault is generally one of the items just listed. If you have tried
all three of those things and the power supply still doesn't work, then
your only recourse is to purchase a new power supply as it is a
- Cable is intermittent or frayed where it enters the power supply on a
hard-wired mic. This is repairable, see "Connector" type repairs above.
If you are still lost and have no idea whether it can be fixed or not or
what component is at fault, you can send us everything and we
can figure it out for you!
To Send us your TRAM® Microphone for Repair, please
complete a Repair
Form. The address to ship to is on the form. The average
repair cost is approximately $45 plus shipping. We suggest you
pre-authorize $55, in case we need a few additional parts (new connector,
etc.). Please Note that a $22.00 service charge, plus
return shipping (if you want it back) will apply to all refused repair
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
microphone will be repaired or replaced, at the manufacture's option, without charge for
either parts or labor, provided the microphone is sent prepaid to the manufacture. This
warranty will not apply if the microphone has been misused, abused, incorrectly
wired or altered. Warranty repair/replacement does not extend this warranty.
To send in a warranty repair, you should send it back to the dealer you
purchased it from along with a copy of your bill of sale. The dealer will
then in-turn forward the mic back to TRAM for repair or replacement.
TramMicrophones.com is not the manufacture, we are only an authorized
distributor and therefore only handle warranty repairs on TRAM microphones that
we have sold.
You can order microphones directly from this website. Follow the links below for online ordering.
Order TR50 Lavalier