Zaxcom TRX743 Plug-on Boom Transmitter
Zaxcom TRX743 Plug-on Boom Transmitter
Zaxcom TRX743 Plug-on Boom Transmitter
Zaxcom TRX743 Plug-on Boom Transmitter
Zaxcom TRX743 Plug-on Boom Transmitter
Zaxcom TRX743 Plug-on Boom Transmitter

Zaxcom TRX743 Plug-on Boom Transmitter

Out of stock


£2,130.25inc VAT

  • 100% digital modulation for superior audio quality
  • Keeps transmitted audio private
  • Built-in timecode reader and generator
  • Highly reliable lossless recording format

Out of stock

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Zaxcom TRX743 Plug-on Boom Transmitter

The Zaxcom TRX743 Plug-on Boom Transmitter is a wide-band plug-on style digital wireless microphone with interchangeable cones to support all professional microphone varieties – mono analog, stereo analog, AES and AES42 – making it an ideal choice for wireless transmission directly from boom poles or handheld microphones. The TRX743 features the new Zaxcom High Density (ZHD) Modulation. ZHD Modulation allows up to 10 channels of wireless to be operated in only 1 MHz of spectrum space. Channel spacing will vary based on the receiver you pair it with.

The wireless signal is only 50 KHz wide and can be spaced as close as 100 KHz channel to channel allowing up to sixty channels of ZHD wireless in a single 6 MHz American television channel. The new modulation is ultra efficient resulting in incredible transmission range.

The ZHD transmitters are capable of running all existing mono Zaxcom modulations maintaining compatibility with all currently produced Zaxcom receivers. ZHD modulation conforms to all currently proposed FCC regulations for spectrally efficient wireless transmission.

A bit about spacing…

  • The TRX743 paired with any Zaxcom wireless receivers in Mono or XR Modes can be spaced as close as 400 KHz channel to channel
  • The TRX743 paired with any Zaxcom QRX235, QRX200 or QRX212 in ZHD mode can be spaced as close as 200 KHz channel to channel (300 KHz recommended)
  • The TRX743 paired with the upcoming QRX335, QRX300 or QRX312 in ZHD mode can be spaced as close as 100 KHz channel to channel

The TRX743.5 covers blocks 20 through 23 (512-614MHz) and the TRX743.6 covers blocks 23 through 26 (596 – 698 MHz). Its body is constructed from a combination of high strength nylon polymer and aluminum. The 743 utilizes Zaxcom’s battery saving feature PowerRoll™. PowerRoll™ automatically adjusts the transmitter output power based on the record status as sent via ZaxNet boosting the output power level up to 100 mW while rolling and powering down to 25 mW while on standby.

The Zaxcom TRX743 Plug-on Boom Transmitterworks with ZaxNet, Zaxcom’s 2.4-GHz RF network that distributes remote control commands, timecode and IFB audio. With ZaxNet, one can remotely control transmitter settings such as gain, frequency channel selection, transport controls and output power levels. When paired with an IFB100/200 and Deva or Fusion the units can also replay audio via a timecode reference giving production sound mixers the ability to replay and remix audio, creating a virtual multi-track playback and re-record system.

The TRX743 also sends a Quality Control audio signal over ZaxNet so when micing someone you don’t have to go to the cart to hear how it sounds. Now you can use an ERX to listen to the mic right on the spot.

The TRX743’s cones are easily swapped in the field for ultimate flexibility. It comes standard with the cone of your choice, extra cones can be purchased as accessories.

100% digital modulation for superior audio quality

keeps transmitted audio private

removes unwanted spurious emissions for a cleaner signal

capture quality back-up audio even in the most hostile RF environment

records timecoded audio files

highly reliable lossless recording format

gives you an incredible dynamic range without clipping your audio

built-in timecode reader and generator

provides wireless timecode, ZaxNet audio and remote control between Zaxcom products

quality control confidence monitoring without returning to your cart

a 50 KHz wide signal spaced as close as 100 KHz apart with outstanding transmission distance

Ultra small spectral footprint of 50kHz that can be spaced as close together as 100KHz

The TRX743 has interchangeable input cones giving you the ultimate in flexibility. You can connect any microphone to the 743.

Wide-band transmitter with built-in recording that’s RF remote controllable – what more could you ask for?
action shot

Cone choices:
Mono Analog – 3-Pin XLR
Stereo Analog – 5-Pin XLR
AES (not powered) – 3-Pin XLR
AES42 (powered) – 3-Pin XLR
Zaxcom Digital Recording Wireless Transmitters are protected under patent #’s: 7,711,443 & 7,929,902


All orders are delivered via next day tracked carrier. When placing an order please provide a suitable e-mail address and mobile number.

On despatch you will receive a notification from our carriers DPD along with updates right up to the point of delivery.

On the day of delivery you will get an accurate 1 hour time window for the items arrival.

You’ll even be able to contact your driver and track his progress!

Track your parcel here: DPD Tracking

Delivery Rates

We deliver Worldwide!

*Please note, FREE SHIPPING applies to Mainland UK addresses only.

Can’t see your country in the list below? Don’t worry, let us know and we’ll add it!

Country Delivery Cost Ex vat
UK Mainland (orders under £400 ex vat)  £6.66 – Next Day Courier
UK Mainland £2.46 – Royal Mail 2-3 Days
UK Mainland Saturday Shipping £13
Austria £20
Belgium £15
Bosnia £65
Bulgaria £35
Croatia £30
Czech Republic £25
Denmark £20
Estonia £30
Finland £30
France £15
Germany £15
Greece £35
Hungary £30
Iceland £65
Italy £25
Jersey £25
Latvia £35
Lithuania £35
Luxembourg £15
Netherlands £15
Norway £65
Poland £30
Portugal £30
Republic of Ireland £25
Romania £35
Serbia £65
Slovakia £25
Slovenia £25
Spain £25
Sweden £65
Switzerland £50

Returns Policy:

Not happy with your purchase?
Don’t worry, you can return goods ordered from us at any time within 14 working days of receipt for a full refund or for an exchange for a different product. Before returning any items, notify us so we know what to expect.
All we ask is that you return the items to us in the same condition that we supplied them to you. Please package the items up securely and safely so that they are not damaged during transit. Uuse the original delivery packaging where possible.

We strongly recommend using a recorded or tracked delivery service. Please send the return items to:
Returns, Raycom Ltd, Unit 8 Abbey Court Lane, Abbey Lane, Evesham, WR11 4BY

Returns Terms & Conditions:

Returns of an order for a refund or an exchange:

  • Cost of return – The costs of returning goods to Raycom shall be borne by you, the customer, in all circumstances without exception, unless otherwise agreed upon with Raycom.
  • Loss & damage – Return items must be packed suitably and insured against the event of loss in transit. Raycom Ltd will not be responsible for lost or damaged returned goods. Lost or damaged goods may effect the level of refund on equipment.
  • Delivery costs – The original postage and packaging costs will not be refunded under any circumstances unless agreed with Raycom Ltd
  • Upon receipt of the goods, to Raycom Ltd, and with prior arrangement, we will give you a full refund of the amount paid or an exchange credit as required and agreed

The right to return goods to us will not apply in the following circumstances:

  • in the event that the product has been used, in any way, shape or form, other than limited useage when the goods are unpacked
  • in the case of software, audio or visual products, where the packaging has been unsealed, broken or is incomplete
  • to any products that we have made on special order and or customised specifically for you

The provisions of this clause do not affect your statutory rights. For more information, please see our Terms & Conditions, or should you have a question regarding this policy, please do get in touch.

Cancelling an order:

In accordance with the distance selling regulations, any order with us can be cancelled before we have dispatched your items. In this instance we will refund you in full using the chosen payment method. Terms for our cancellation and returns policy.

If you wish to cancel your order:

  • Notify us by email before we have dispatched the goods to you, or
  • where goods have already been dispatched to you, by returning goods to us in accordance with our returns policy

RF Modulation: Proprietary Digital Method
TRX743.5 RF Frequency Range: 512 – 614 MHz
TRX743.6 RF Frequency Range: 596 – 698 MHz
RF Frequency Step: 100 KHz
RF Bandwidth in ZHD Mode: 50 KHz
RF Bandwidth in XR Mode: 200 KHz
Channel Separation in ZHD Mode: as close as 100 KHz (receiver dependent)
Channel Separation in XR Mode: 400 KHz
Antenna Connector: 50 Ω SMA Female
Emission Designator: 180 KV2E, 100 KV2E, 50 KV2E
FCC Part: 74.861

Dynamic Range: 126 dB (Stereo model 106 dB)
Distortion: 0.002%
Frequency Response: Mode 0: 20 Hz to 16 kHz / T & M Mode 0.2 Hz to 16 kHz
High Pass Filter: Off or 30 to 220 Hz, Steps: 10 (6 dB Per Octave)
Mic Connector: 3-Pin or 5-Pin XLR
Analog Mic Power: 48 V Phantom (10 mA max)
Digital Mic Power: 10 V AES42 compatible (200 mA max)
Input Range: -60 to -30 dBu
Mic Impedance: 4.7 k Ω
ADC Bit-Depth: 24 Bits
Audio Interfaces: Balanced analog mono, balanced stereo, AES42, AES

Clock Accuracy: 1.54 PPM (1 Frame Out in 6 Hours)
Timecode Type: SMPTE
Timecode Frame-Rates: 23.98, 24, 25, 29.97NDF, 29.97DF, 30NDF, 30DF

Media: MicroSD Card (Flash Memory)
File Format: .ZAX

RF Frequency Range: 2.403 to 2.475 GHz
RF Modulation: Digital Spread Spectrum
RF Frequency Step: 0.001 GHz (1 MHz)
RF Bandwidth: 1 MHz
Channel Separation: 2 MHz
Sensitivity: -96 dBm

Weight: 7.5 oz with Battery
Dimensions (H x W x D): 5 cm x 11.5 cm x 4 cm
Display: Graphic OLED

Power Output: 25, 50 or 100 mW – Software Selectable
Battery Type: 3 AA cells
Battery Life is dependent on Battery type and microphone power requirements

Zaxcom TRX743 Manual