
Key Features:
Ultra-Miniature Size for Inconspicuous Use• 
Omnidirectional Polar Pattern to Provide Clean • 
Sound and Uniform Response 
Lightweight, Low Profile, Rugged Construction• 
Superior Sound Quality• 
Terminated with Female TA4F Connector for • 
use with any EV Wireless Bodypack Transmitter 
Available in Black or Beige Finish• 
RE97LTx
Ultra-Miniature Condenser
Lapel Microphone
TA4F Connector
General Description: Technical Specifications:
The Electro-Voice® RE97LTx is an ultra-miniature, 
omnidirectional, condenser microphone designed for 
applications that demand a high quality microphone 
element that is practically invisible when worn by 
the speaker or performer. The RE97LTx is intended 
for spoken-word use in theatrical performance, fixed 
installations, corporate AV presentations, houses of 
worship, or any venue where a full-range, natural, and 
well-balanced sound is required from an inconspicuous, lightweight microphone.
The output of the RE97LTx is clean and accurate, while 
the omni-directional polar pattern ensures uniform 
output regardless of the microphone’s angle relative 
to the sound source. The provided clip is a convenient 
anchor for the microphone on a lapel, tie, or shirt collar.
The supplied windscreens can be utilized in windy 
environments and to reduce breath noise. The RE97LTx 
has a shielded 4ft cable terminated in a genuine 
Switchcraft® TA4F connector and is ready for use 
with standard EV and Telex body-pack transmitters 
including the EV REV-BP, BPU-2/CSB-1000 and Telex 
WT-500/WT-1000. The wire to the body-pack is ultraflexible, and may be easily concealed.
Output Impedance, 1 kHz: 3000 Ohms
Power Requirements: +5 VDC
Current Consumption: 310 μA
TA4F Connector Wiring: Pin 1 - Ground
Accessories Furnished: Long and Short Windscreens
Net Microphone Weight: 10.5 g (0.4 oz)
Optional Accessories: TXA Phantom Power Adapter
Transducer: Condenser, Back-Electret
Freq. Response: 50 Hz - 15 kHz
Polar Pattern: Omnidirectional
Sensitivity, 1 kHz: -48 dBV, 4.0 mV/Pascal
Maximum SPL: >120 dB SPL
Equivalent Noise: 32 dBA
Dynamic Range: 88 dB
Polarity: Positive Pressure on Diaphragm
Produces a Positive Voltage on Pin 2
Dimensions: See Diagram
Cable: 4 ft (1.22 m) Long
0.052 in (1.30 mm) Diameter
Pin 2 - Audio 
Pin 3 - Bias Voltage 
Pin 4 - Unused
Dual Clothing Clip 
Gig Bag
Colors Available: Black, Beige
Clip Only - 2.1 g (0.08 oz)
 

Frequency Response:
Windscreen Assembly:
The windscreen assembly is supplied with a plastic 
adaptor to improve stability. 
To apply: Hold the windscreen firmly at the “A” locations. Firmly press the microphone into the adaptor 
until it stops. 
NOTE: Use caution when removing the microphone 
from the windscreen. Do not pull on product wire: grip 
microphone by metal housing only. 
Polar Response:
Microphone Positioning:
Best results will be achieved with the microphone positioned 3 to 6 inches below the neckline. Typical locations 
are on the lapel, shirt collar, or on the shirt directly below the chin. You should avoid covering the microphone with 
any cloth or other material as this may change the frequency response characteristic of the microphone. 
If mechanical noise from the cable is detected, it may be minimized by looping the cable up and through the dual 
tie clip as shown in the picture on page 1, or by immobilizing the cable against the talker’s body. 
Product Dimensions:
Dimensions are in inches. Bracketed dimensions are millimeters.
 

Interfacing RE97L:
Your RE97LTx is configured for use with standard Electro-Voice and Telex bodypack transmitters. Modifications to 
your RE97L should be performed by a qualified technician only. Using the microphone in a way other than described in this manual may damage the microphone and void your warranty.
The following table is provided for your reference should you desire to utilize the RE97L with another manufacturer’s wireless transmitter bodypack. Always verify the specifications of your transmitter before attempting any 
changes to your microphone.
Manufacturer Wireless Systems Connector Type Suggested Wiring
AKG
AT UniPak-type Transmitters ATW-1127, ATW-1235, ATW-1451,
Audio-Technica
Electro-Voice RE-2 (BPU-2); RE-1 (CSB-1000); R100 (BPV) TA4F
Sennheiser
Shure
Telex
ATW-2110, ATW-3110a, AEW-T1000, ATW-201, ATW-601,
ESW-T210, and ESW-T211 for the following systems: 1100,
1200, 1400, 2000, 3000, 4000, and 5000 Series Professional;
200 and 600 Series Freeway; NOT for use with U100 System
Performance Gear (UT1); PGX1; SLX1; T Series (T1, T11);
FMR Series 70, 500, 1000 (Transmitters WT-55, WT-500,
WMS 40 Pro, WMS 400, and WMS4000
(Transmitters PT 40, PT400, and PT4000)
Evolution Wireless Systems 100, 300, 500
(Transmitters SK100, SK300, SK500), and G2 Series
UC1; UHF (U1); UHF-R (UR1); ULX Professional and
ULX Standard (ULX1)
WT-1000); SAFE 1000 (SAFE WT)
TA3F
Hirose 4-Pin
HR10A-7P-4S
3.5mm (1/8”)
Stereo or Mono
Mini-Plug
TA4F
TA4F
Pin 1: Shield 
Pin 2: Wire 
Jump Pin 2 to Pin 3 
Pin 1: Shield 
Jump Pin 1 to Pin 2 
Pin 3: Wire
Shunt Pins 3-4 with R = 5k Ohms
Pin 1: Shield 
Pin 2: Wire 
Shunt Pins 2-3 with R = 10k Ohms 
Pin 4: Not Connected 
Tip: Wire 
Sleeve: Shield 
Ring: Not Connected 
5V Zener diode: + to tip, - to sleeve
(1N5231 or similar) 
Pin 1: Shield 
Shunt Pins 2-3 with R = 10k Ohms 
Pin 3: Wire 
Pin 4: Not Connected 
Pin 1: Shield 
Pin 2: Wire 
Shunt Pins 2-3 with R = 10k Ohms 
Pin 4: Not Connected
Electro-Voice
12000 Portland Avenue South, Burnsville, MN 55337 
Phone: 952/884-4051, Fax: 952/884-0043
®
www.electrovoice.com
© Bosch Communications Systems  05/2010
Part Number LIT000165000 Rev D
RE97LTx Part Numbers
F01U149502  RE97LTx Lapel Microphone, Beige Finish• 
F01U149504  RE97LTx Lapel Microphone, Black Finish• 
U.S.A. and Canada only. For customer orders, contact Customer Service at:
800/392-3497 Fax: 800/955-6831
Europe, Africa, and Middle East only. For customer orders, contact Customer Service at:
+ 49 9421-706 0 Fax: + 49 9421-706 265
Other Internatonal locations. For customer orders, Contact Customer Service at:
+ 1 952 884-4051 Fax: + 1 952 887-9212
For warranty repair or service information, contact the Service Repair department at:
800/685-2606
For technical assistance, contact Technical Support at: 866/78AUDIO
Specifications subject to change without notice.