Sony DWZ-B70HL DWZ Series Digital Wireless Headset & Lavalier Set

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Package features ZRX-HR70 digital wireless half-rack receiver, ZTX-B02RC digital wireless body-pack transmitter and uni-directional electret condenser lavalier and headset microphones


The lavalier / headset set version of the DWZ digital wireless microphone system offers high quality 24-bit / 48KHz linear PCM digital transmission and is optimised for applications such as congress centres, universities, schools, community halls, hotels, board rooms and small theatres. The system is supplied with the ECM-LZ1UBMP digital wireless uni-directional electret condenser lavalier microphone and the ECM-HZ1UBMP digital wireless uni-directional electret condenser lightweight headset microphone. Using the 2.4GHz frequency band for transmission, the DWZ-B70HL can be used licence- and cost-free in nearly every country worldwide. The system also includes AES 128-bit encryption technology to ensure highly secure transmission.


Superb digital sound with intelligent feedback reducer


With 24-bit linear PCM digital, you get high sound quality with reliable RF transmission, utilising unique transmission technology developed by Sony. Also, with support for two RF modes, your experiences can be shared over WiFi. The Intelligent Feedback Reducer function supresses unwanted feedback.

Superb digital sound quality

High-quality 24-bit linear PCM digital transmission offers pristine audio and a wide frequency range of 10 Hz to 22 kHz. Audio performance degradation that’s typical of conventional analogue wireless systems is avoided, as these packages are designed without the need for a compander.

Two RF modes for reliable transmission

The DWZ Series provides two selectable RF modes. Simply choose the one that makes best use of your actual 2.4 GHz RF environment:


Wide Band Hopping mode


This mode reduces interference to other wireless equipment used in the same environment such as WiFi. There’s no need for advanced technical knowledge about radio frequency. Wide Band Hopping mode also supports additional error correction for more secure transmission*1. 


Narrow Band Hopping mode


This mode helps to avoid interference from other devices – for example, 2.4 GHz wireless remote controllers that are commonly used for lighting control. This enables frequencies to be coordinated when using multiple wireless systems simultaneously*2. 


*1 Audio delay: Approx. 6 ms


*2 Audio delay: Approx. 3 ms

Intelligent Feedback Reducer function

The Sony Intelligent Feedback Reducer can suppress unwanted feedback (howling) with high-performance DSP and Sony’s unique algorithms designed to eliminate feedback before it becomes unbearable. Up to 1024-band suppression filters are continuously tuned automatically in real time, eliminating feedback and avoiding deteriorating the original signal; this delivers the highest quality sound that can be enjoyed by presenters, vocalists and audiences. You can freely select the audio outputs to which you want this feedback reduction filter to apply – for example, you can output original audio to the main PA system, while processed audio is delivered to your monitor speakers.

Stable transmission

Interruptions in reception (signal dropout) can be a problem with wireless microphone transmission systems. With the DWZ Series, however, dropouts are reduced to a minimum. Utilizing a space diversity reception system, stable reception is achieved by using dual-antenna inputs / reception circuits. These receive signals over two different paths and automatically select the stronger RF signal for output.

Highly secure transmission

The ZTX-HR70 offers AES 128-bit standard encryption technology to secure transmitted signals and avoid being intercepted by others. By using this encryption feature, users can reduce the worry that confidential information could be intercepted.

Large colour LCD

The ZRX-HR70 half-rack size receiver includes a large colour LCD display to provide detailed visual status of your selected channel, signal, and five-band digital equalizer, along with audio level, and transmitter battery life.

Fast and easy setup

With its Clear Channel Scan and Best Channel Selection features, the half-rack ZRX-HR70 detects unoccupied channels and selects the most appropriate channel automatically, for fast and easy system setup.

Wired / wireless seamless operation

The ZRX-HR70 is equipped with a Cable Tone Generator feature to simulate a wired tone when using wireless. There’s no need to adjust the equalizer setting on your amplifier when switching between wired and wireless. Simply set the Cable Tone Generator menu on the ZRX-HR70 display to match the desired wired tone.

Five-band equaliser

With the five-band digital equalizer in the half- rack ZRX-HR70 receiver, you’ll find it’s easy to adjust the sound character of your handheld microphone as desired.

Tuner out interface

Tuner output is available for tuning. The ZRX-HR70 also has a transmitter-muting selector, which provides a choice of connectors that can be muted.

Rack-mountable 1U half-rack size with detachable whip antenna

The ZRX-HR70 is mountable with optional RMM-HRD1 rack mount kit.

Variety of interfaces

The ZRX-HR70 features 3-way parallel audio output, ¼” TS phone (x2), and balanced XLR (x1).

Headset and lavalier microphones

The DWZ-B70HL package includes two types of microphones. The ECM-HZ1UBMP is a uni-directional electret condenser lightweight headset that keeps you comfortable and stress-free even when wearing it for long periods of time. Its ear-clip-style design allows you to wear it on either your left or right ear. The ECM-LZ1UBMP is a uni-directional electret condenser lavalier microphone, ideal for commercial sound applications such as presentations, lectures and conferences.

Robust metal body

The ZTX-B02RCis made of strong durable metal. Metal construction supports reliable use in rough operating conditions.

Easy-to-use operation

The ZTX-B02RC features a momentary switch for muting or talk-back application.

Two AA battery operation and contactless rechargeable function

The ZTX-B02RC is powered by AA batteries with a contactless rechargeable function (with optional BC-DWZ1 battery charger).

Transmitting Section

Transmitter Type Bodypack

Antenna Type Internal monopole antenna

Type of Emission F1D and F1E

Modulation Method GFSK

Carrier Frequencies 2402.0 MHz to 2478.5 MHz 


Ch1: 2402/2478.5 MHz

Ch2: 2421.5/2472.5 MHz

Ch3: 2427.5/2475.5 MHz

Ch4: 2424.5/2446.5 MHz

Ch5: 2449.5/2469.5 MHz

Ch6: 2405/2452.5 MHz

Ch a: 2469.5/2474/2478.5 MHz

Ch b: 2442.5/2447/2451.5 MHz

Ch c: 2415.5/2420/2424.5 MHz

Ch d: 2456/2460.5/2465 MHz

Ch e: 2429/2433.5/2438 MHz

Ch f: 2402/2406.5/2411 MHz

RF Power Output 10 mW (e.i.r.p.)

Occupied RF Bandwidth 2.5 MHz

Receiving Section

Receiver Type Rackmount (Half / 1 channel)

Reception Type Space diversity

Antenna Type External whip antenna

Receiving Frequencies 2402.0 MHz to 2478.5 MHz 


Ch1: 2402/2478.5 MHz

Ch2: 2421.5/2472.5 MHz

Ch3: 2427.5/2475.5 MHz

Ch4: 2424.5/2446.5 MHz

Ch5: 2449.5/2469.5 MHz

Ch6: 2405/2452.5 MHz

Ch a: 2469.5/2474/2478.5 MHz

Ch b: 2442.5/2447/2451.5 MHz

Ch c: 2415.5/2420/2424.5 MHz

Ch d: 2456/2460.5/2465 MHz

Ch e: 2429/2433.5/2438 MHz

Ch f: 2402/2406.5/2411 MHz

RF Sensitivity 24 dBμV or less

Antenna Section

Input Connector BNC-R, 50 Ω (x2)

Audio Section

Capsule Type Electret condenser

Directivity Uni-directional

Input Connector 3-pole locking mini plug

Input Impedance 1.8 k ohms or more(MIC input) / 1 M ohms or more(INST input)

Reference Input Level MIC: -58 dBu

INST/LINE: -28 dBu (when attenuator level is 0 dB)

Maximum Input Level MIC: -22 dBu 

INST/LINE: +8 dBu (when attenuator level is 0 dB)

Audio Attenuator Adjustment Range 0 / 10 / 20 dB

Frequency Response Transmission: 10 Hz to 22 kHz 

Headset Microphone: 60 Hz to 18 kHz 

Lavalier Microphone: 60 Hz to 18 kHz

Dynamic Range MIC: 102 dB (A-weighted)

INST/LINE: 98 dB (A-weighted)

Distortion (T.H.D) 0.03% or less (-38 dBu, 1 kHz input)

Audio Delay Narrow band mode: Approx. 3 ms / Wide band mode: Approx. 6 ms (Transmitter + Receiver)

Analog Output XLR-3-32, balanced (x1)

Phone jack, unbalanced (x2)


Maximum output level

-Balanced Output

MIC: -22 dBu

LINE: +24 dBu

-Unbalanced Output: +8 dBu


Reference output level

-Balanced Output

MIC: -58 dBu

LINE: -12 dBu

-Unbalanced Output: -28 dBu

Other Equipment

Display LCD


Power Requirements ZTX-B02RC: 3.0 V DC (two LR6 (size AA) alkaline dry cell batteries)

ZRX-HR70: External DC input: 12 V DC

Battery Operating Time Approx. 10 hours of continuous use (25 °C (77 °F) ambient temperature, Sony LR6 (size AA) alkaline dry cell batteries)

Operating Temperature 0°C to 50°C

32°F to 122°F

Storage/Transport Temperature -20°C to +60°C

-4°F to +140°F

Dimensions* ZTX-B02RC: 63 × 87 × 20 mm (2 1/2 × 3 1/2 × 13/16 inches) (w/h/d) (excluding the antenna)

ZRX-HR70: 168 × 44 × 96 mm (6 5/8 × 1 3/4 ×3 7/8 inches) (w/h/d)

Mass ZTX-B02RC: Approx. 162 g (5.7 oz.) (including batteries)

ZRX-HR70: Approx. 510 g (1 lb. 2.0 oz.)

Supplied Accessories Uni-directional Lavalier Microphone (1)

Uni-directional Headset microphone (1)

Mic holder clip (1)

Cord clip (1)

Wind screen (1)

Belt clip (1)

Belt clip screw (1)

Antenna (2)

AC adapter (1)

Quick Start Guide (1)

Before Use (1)

CD-ROM (1)

Optional Accessories BC-DWZ1








Notes * The values for dimensions are approximate.


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