Audio-Technica BP894CLM3-TH, BP894xCLM3 Datasheet

BP894x MicroSet® Cardioid Condenser Headworn Microphones

The AT8545 power module included with wired models is equipped with an 80 Hz high­pass UniSteep® filter that provides easy switching from a flat frequency response to a
low-end roll-o. The roll-o position reduces the microphone’s sensitivity to popping
in close vocal use. It also reduces the pickup of low-frequency ambient noise (such
as trac, air-handling systems, etc.), room reverberation and mechanically coupled
vibrations. To engage the UniSteep® filter, use the end tip of a paperclip or other small
pointed instrument to slide the switch toward the “bent” line.

Broadcast & Production Microphones

Features

• Features a rotating capsule housing with talk-side indicator for perfect polar
pattern placement from either ear

• Subminiature cardioid condenser capsule oers extremely intelligible, natural
vocal reproduction

• Inconspicuous, lightweight headset with capsule diameter of just 2.6 mm is ideal
for applications requiring minimum visibility

• Ergonomic under-ear design—the flexible, lightweight, contoured loop hooks
behind the ear for an ultra-secure, comfortable fit even for those wearing glasses

• Detachable, field-replaceable cable with robust connector at the earset and a
variety of available terminations

• Handles high sound pressure levels with ease

• Wired version’s power module (AT8545) includes a high-pass filter that provides
a steep low-frequency attenuation to improve sound pickup without aecting
voice quality

• Comes with the AT8464x Dual-Ear Adapter Kit that converts the single-ear
MicroSet to a unit that’s worn on both ears for maximum stability and comfort

• Constructed of hypoallergenic materials

BP894x Description

The BP894x is a headworn condenser microphone with cardioid polar pattern. It is
designed to provide intelligible natural audio for stage and television talent, lecturers, and
worship leaders.

The microphone includes a 1.4 m (55") detachable, field-replaceable cable that is available
in a variety of terminations for use in wired and wireless applications, as indicated below.

Cable Terminations

BP894x, BP894x-TH: Terminated with a cH-style screw-down 4-pin connector for
use with the included AT8545 power module.
BP894xcH, BP894xcH-TH: Terminated with a cH-style screw-down 4-pin connector
for use with Audio-Technica wireless systems featuring cH-style connector.
BP894xcW, BP894xcW-TH: Terminated with a cW-style locking 4-pin connector for
use with Audio-Technica wireless systems featuring cW-style connector.
BP894xcLM3, BP894xcLM3-TH: Terminated for Sennheiser® wireless systems using
locking 3.5 mm connector.
BP894xcT4, BP894xcT4-TH: Terminated with TA4F-type connector for Shure®
wireless systems.

Model numbers ending in “TH” are beige.

Audio-Technica® is a registered trademark of Audio-Technica. Other product and company names mentioned herein may be
trademarks and/or service marks of their respective owners.

The flexible design of the BP894x MicroSet enables it to be worn on either the left
or right ear. Bend a gentle upward curve in the microphone’s boom, then hook the
lightweight contoured loop around the back of your ear, so that the boom extends from
the bottom of your ear. Adjust the boom as needed to follow the contour of your face,
positioning the microphone near the corner of your mouth. The microphone has a large
acoustical sweet spot; experiment with placement near the corner of your mouth for
optimal performance.

The BP894x features a unique 180-degree rotating capsule housing, which must be
adjusted when moving the microphone from one ear to the other. A talk-side indicator
shows you which way to turn the capsule housing for your desired position. Simply
locate the white dot on the capsule housing and rotate the capsule until the white dot
faces your mouth.

A cable clip is provided for strain relief, allowing the microphone to remain securely in
place without the weight of the cable pulling on the headset. To use the clip, slip the
cable into the clip’s cable-holding groove, then attach the clip to your clothing, leaving
enough slack in the microphone cable to allow for free, comfortable motion.

The included AT8464x Dual-Ear Adapter Kit allows you to convert the BP894x to a dual­ear unit for increased stability and comfort. The BP894x attaches to either side of the
adapter so that the microphone can be worn to either the left or right of your mouth.
The headband easily adjusts to fit both children and adults.

How to use the Dual-Ear Microphone Mount

1. Insert the rounded end of your BP894x ear hook into the larger opening of the
adapter’s left or right tapered holder. Firmly seat the ear hook in the tapered holder.

2. Insert the small rounded end of the additional supplied ear hook into the larger
opening of the adapter’s remaining tapered holder. Firmly seat the ear hook in the
tapered holder.

3. Open the adapter’s adjustable behind-the-neck headband to its maximum position
by pushing the headband’s adjusting tabs together (a). Put the behind-the-neck
headband on, hooking the ear hooks over your ears. Adjust the fit of the headband
as needed by sliding the headband’s adjusting tabs until you arrive at a secure,
comfortable fit (a). Attach the microphone cable to the cable clip positioned between
the headband’s adjusting tabs (b).

3

a

b

2

1

The wired models (BP894x, BP894x-TH) require 11V to 52V phantom power for operation.
Included for this purpose is the AT8545 power module, which is equipped with a cH-style
screw-down 4-pin input connector and a 3-pin XLRM-type output connector. A recessed
switch in the power module permits choice of flat response or low-frequency roll-o (via
integral 80 Hz high-pass UniSteep® filter) to help control undesired ambient noise. A belt
clip is also included to hold the power module.

All models of the microphone come with a cable clip, a dual-ear adapter kit, two
windscreens, a moisture guard, and a protective carrying case. The microphone is available
in black and beige.

Operation and Maintenance

The BP894x requires 11V to 52V phantom power for operation (wired only).

Output is low impedance (Lo-Z) balanced. The signal appears across Pins 2 and 3; Pin
1 is ground (shield). Output phase is “Pin 2 hot”—positive acoustic pressure produces
positive voltage at Pin 2.

The donut-shaped moisture guard is provided to protect the element from sweat and
moisture. Position the moisture guard as close to the element as possible to provide
maximum protection. To remove the moisture guard, first remove the element cover and
place it out of harm’s way. Gently slide the moisture guard over the element. Replace the
element cover.

Avoid leaving the microphone in the open sun or in areas where temperatures exceed 110°
F (43° C) for extended periods. Extremely high humidity should also be avoided.

BP894x

NEAR FIELD: 2-3 cm (0.8"-1.2")

LEGEND

Frequency in Hertz

Response in dB

10 dB

100

50

200

10k

5k

1k

500

2k

20k

Roll-off

Wireless Termination Diagrams

Wireless Termination Diagrams

4
3

BP894xcW, cW-TH

Function Wire Color

Pin 1 Ground/Shield Green
Pin 2 Instrument Jumper to Pin 1
Pin 3 Mic Audio Copper Color
Pin 4 Bias + In Red

1
2

4
3

BP894xcH, cH-TH

Function Wire Color

Pin 1 Ground/Shield Green
Pin 2 Instrument Jumper to Pin 1
Pin 3 Mic Audio Copper Color
Pin 4 Bias + In Red

1
2

ring

sleeve

3

2

BP894xcT4, cT4-TH

Function Wire Color

Pin 1 Ground/Shield Green
Pin 2 Bias + In Red
Pin 3 Mic Audio Copper Color
Pin 4 Source Load Jumper to Pin 3

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verschillende talen “on-line” beschikbaar op: www.audio-technica.com.

1

4

BP894xcLM3, cLM3-TH

Function Wire Color
Sleeve Ground/Shield Green
Ring Mic Audio Copper Color
Tip Bias + In Red

tip

Specifications

Element

Polar pattern

Frequency response

Low frequency roll-o

Open circuit sensitivity

Impedance

Maximum input sound level

Dynamic range (typical)

Signal-to-noise ratio

Phantom power requirements

Current consumption

Voltage range

Switch

Weight

Dimensions

Output connector (power module)

Audio-Technica case style

Accessories furnished

In the interest of standards development, A.T.U.S.

oers full details on its test methods to other industry

1 Pascal = 10 dynes/cm

1

Typical, A-weighted, using Audio Precision System One.

Specifications are subject to change without notice.

professionals on request.

2

= 10 microbars = 94 dB SPL

Fixed-charge back plate, permanently
polarized condenser
Cardioid
20-20,000 Hz
80 Hz, 18 dB/octave (wired only)
–47 dB (4.3 mV) re 1V at 1 Pa
250 ohms (wired only)
135 dB SPL, 1 kHz at 3% T.H.D.
98 dB, 1 kHz at 3% T.H.D. Max SPL
(wired only)

1

57 dB, 1 kHz at 1 Pa
11-52V DC, 2 mA typical (wired only)

0.25 mA typical at 5V (wireless only)

3.5-10V (wireless only)
Flat, roll-o (wired only)
Microphone, boom & earpiece:

2.0 g (0.07 oz) (without cable)
Power module (wired only): 85 g (3.0 oz)
Microphone: 9.67 mm (0.38") long,

2.6 mm (0.10") diameter
Boom: 98.4 mm (3.87") long,

1.07 mm (0.04") diameter
Power module (wired only): 100.0 mm
(3.94") long, 18.9 mm (0.74") diameter
Integral 3-pin XLRM-type

Cable

Detachable 1.4 m (55") long, 1.6 mm (0.06")
diameter, 2- or 3-conductor shielded cable
(termination dependent)
M40
AT8545 power module (wired only);
AT8464x dual-ear adapter kit;
AT8440 cable clip; AT8163 windscreen;
AT8171 windscreen; moisture guard; belt
clip (wired only); carrying case

www.audio-technica.com

frequency response: 20– 20,000 Hz polar pattern

10 dB

50

LEGEND

500

200

100

Frequency in Hertz
NEAR FIELD: 2-3 cm (0.8"-1.2")
Roll-off

5k

2k

1k

10k

Response in dB

20k

270˚

240˚

Audio-Technica Corporation

www.audio-technica.com
©2019 Audio-Technica P52763

0˚

30˚

330˚

300˚

210˚

SCALE IS 5 DECIBELS PER DIVISION

150˚

180˚

60˚

90˚

120˚

LEGEND

200 Hz

1 kHz
5 kHz
8 kHz