NUX C-7X4 Stereo Wireless In-Ear Monitor System - 1 Transmitter & 4 Receivers

The C-7X4 pairs a single transmitter with four receivers in one dedicated carry case, making it the practical choice for band rehearsals, live streaming setups, interviews, and any scenario where several people need to monitor the same wireless source at once. Every feature available on the standard C-7, Manual pairing, channel scanning, frequency hopping, EQ presets, works identically across all four receivers simultaneously.

Flexible Pairing For Any Setup

Auto mode gets a single performer connected in seconds with a straightforward 1-to-1 pairing. Manual mode opens up further, supporting one transmitter linked to multiple receivers across 10 selectable channels — the configuration that makes synchronised monitoring across an entire band possible from a single audio source. Should interference crop up mid-performance, a single button press triggers frequency hopping to jump to a cleaner channel without breaking stride, and Manual mode also supports full channel scanning to proactively find the most stable frequency available.

Built To Solve The Real Problems Of In-Ear Monitoring

In-ear monitoring is prone to the occlusion effect, a build-up of boosted low frequencies and a muffled quality caused by the physical seal of the earphones themselves. The C-7 addresses this directly with 5 built-in monitoring EQ presets specifically designed to counteract that effect, delivering a clearer, more natural sound than most in-ear setups achieve. Stereo and Mono modes cover different connection scenarios: Stereo suits headphone-output devices, while Mono is built for Line Out or Aux Out connections and routes the full signal to a single channel, ideal for solo practice with a guitar, amp modeller, or interface, where hearing every detail matters more than stereo width.

A Practice Tool As Much As A Performance Tool

Because the transmitter accepts standard 1/8" or 1/4" stereo input, it connects directly to audio interfaces, mixers, streaming setups, and personal monitoring rigs with just 5.8ms of latency, low enough that the connection feels instantaneous. Plugging a guitar, amp modeller, or interface straight into the transmitter turns the C-7 into a genuinely usable silent practice system, at any hour, without disturbing anyone nearby.

All-Day Battery Life

A single charge delivers up to 6 hours of use with a working range of up to 30 metres, and the included charging case stores and recharges both the transmitter and receiver together, a single button press starts the charge cycle. Fully charged, the case can recharge the whole system roughly twice over, extending total available runtime to more than 18 hours across a full day of use. Three mounting options on the receiver, clip, lanyard, and magnetic attachment, allow it to be worn however suits the performer or situation best. A double-click of the power button locks the device to prevent accidental changes mid-set, with the same action unlocking it again.

Key Features:

• 5.8GHz Band: Stable connection with low interference, up to 30m range.
• 24-Bit Audio, 5.8ms Latency: High-resolution sound with an effectively instant connection.
• Built-In High-Resolution Display: Signal, battery, mode, and EQ status at a glance.
• Auto & Manual Pairing: Manual mode supports 10 channels, one transmitter to multiple receivers.
• One-Touch Frequency Hopping: Quick recovery from interference mid-performance.
• 5 EQ Presets: Purpose-built to counteract the in-ear occlusion effect.
• Stereo/Mono Switchable: Covers headphone outputs and Line/Aux Out sources alike.
• Up To 6 Hours Battery Life, 18+ Hours With Charging Case.
• 3000mAh Charging Case: Recharges the full system approximately twice.
• 3 Wearing Options: Clip, lanyard, magnetic attachment.
• Button Lock: Prevents accidental changes during a set.
• Works With 16–32Ω Earphones.

• Frequency Band: 5.8GHz ISM (5.725GHz–5.85GHz)
• Transmission Power:
• Operation Range: Up to 30m
• Latency: 5.8ms
• Dynamic Range: 96dB
• THD+Noise: <0.4% @ 1kHz
• Audio Resolution: 24-bit
• Input Impedance (Transmitter): 3.7kΩ
• Maximum Input Level (Transmitter): 2.7 Vrms
• Recommended Headphone Impedance (Receiver): 16–32Ω
• Maximum Output Power (Receiver): 57mW RMS
• Operating Time: Approx. 6 hours
• Charging Time: Approx. 3 hours
• Battery (Transmitter): 3.7V / 750mAh
• Battery (Receiver): 3.7V / 500mAh
• Battery (Charging Case): 3.7V / 3000mAh
• Transmitter Dimensions: 76 x 42.5 x 30mm
• Transmitter Weight: 50g
• Receiver Dimensions: 58.5 x 38 x 33mm
• Receiver Weight: 40g

Digital Downloads (buying software)

All software marked as "serial download" or "digital download" will be delivered via email within normal office hours.

Simply add the software to the basket and at the delivery stage in the checkout please select "Digital Download - Software by email" as your delivery method

Delivery Charges (Main Products)

The cutoff for same-day dispatch is 3:30pm but can vary at busier times such as Christmas.

All orders over £99.00 will be delivered free via our standard delivery 2-3 days (UK Mainland)

If you need your item faster we also offer a Priority Tracked service at £3.99 (1-2 days) or Next Day Tracked £6.99

(please ensure you add a mobile number to your order for tracking)

Saturday delivery is available when ordered before 2pm (Mon-Fri)

All orders below £99.00 will start as low as £2.99 depending upon weight and qty(s) (UK Mainland) 

All Delivery options will be available at the delivery stage in the checkout

EU Delivery Times

Non UK Mainland Addresses please allow 1-3 Days
Delivery To Belgium / France / Germany please allow 3-4 Days
Music PC Systems - Please allow 5-7 Working Days build time (UK) 7-14 (Rest of the World)

French - Pour la Livraison s'il vous plaît permet en France 2-4 Jours
German - Für Lieferung Nach Deutschland erlaubt bitte 2-4 Tage

Delivery Notes
On delivery, you must inspect the goods carefully for damage as Inta Audio is unable to accept responsibility for damage in transit, shortage of delivery or loss of products unless the customer advises Inta Audio of such within three working days from the date of delivery.

Returns Policy

We ask that you follow these guidelines to help us process your return as quickly and efficiently as possible:

1. Please keep your order reference to hand. This confirms your original order and gives us the necessary details to authorise the product’s return.

2. Contact our Customer Services Team on 02476 369898 (or e-mail cs@inta-audio.com). We will then send you an RMA number and returns form which needs to be completed and sent back with the returned item(s).

3. (If the order has been unpacked) re-package it to ensure that it is being returned in its original condition. Please make sure all items relating to the product are returned, including manuals and cables.

4. When returning an item please obtain a ‘proof of postage’ receipt from the Courier.


Returned items must be mailed within 10 days of when the RMA Number has been issued. Items received with a post date 30 days after your requested return will NOT be eligible for refund.

Please note: Our returns policy is quite straightforward but there are a number of conditions that we ask our customers to comply with before applying:

1. It is your responsibility to request a return. If you don’t tell us you want to make a return, we don’t know. Once you do tell us, we will do everything we can to action it.

2. If you have not requested a return within 28 days of receiving an order, we will have assumed that you are intending to keep it and we will not authorise a return.

3. We always refund the payment according to how the original purchase was made and aim to do so within 72hrs of the return being received by us.

4. Returned goods are liable for a restocking fee of 15% towards handling and repackaging if the order is not returned in its original, unopened packaging. This charge will be subject to our inspection of the returned goods.

5. Delivery charges will not be refunded unless the delivered goods are faulty.

6. Replacement products are dispatched immediately after the returned goods have been received and accepted by Inta Audio.

7. Items that develop a fault within 30 days of delivery are eligible for a replacement or a refund. Delivery costs are also reimbursed for faulty items. Please contact our Customer Services Team on 02476 369898 if you believe your item has developed a fault.

Finally, please remember that notifying us of your intention to apply for a return, saving the delivery paperwork and keeping the order in its original packaging will help both you and Inta Audio to process the return quickly.

If you have any questions about our Returns policy please telephone us on 02476 369898 or email us at cs@inta-audio.com.