Nash Siren R4 4 Rod Bite Alarm Set with Receiver

Nash Siren R4 Review: The Angler’s Verdict

The Nash Siren R4 is a premium, top-tier bite alarm that excelled in our comparison, ranking 2nd overall.

Its high price point – the most expensive model we reviewed – is clearly justified by its comprehensive functionality.

This feature set includes extensive sensitivity options (Speed, Wave, and Drift Sensing), essential built-in drop-back detection, and a rechargeable receiver (USB-C). Crucially, the R4 also delivers an ultra-long operating range of up to 750m.

While rated 5 out of 5 stars by initial Amazon buyers, its performance features make it a clear leader in technology and connectivity, boasting a full 24-month extended warranty upon registration.

This alarm is best suited for the technically minded angler seeking absolute precision. It represents an excellent, comprehensive upgrade for keen carp anglers and a top choice for serious specialists.

Below, you’ll find our comprehensive review of the Nash Siren R4 bite alarm. We’ve also summarised the available customer feedback to give you a quick overview of the main advantages and disadvantages (the pros and cons) of this high-performance alarm set.

Our Verdict: The Nash Siren R4 Bite Alarm

 

Bite Alarm Type / Range / Type of Motion Sensor / Accessory Compatibility

The Nash Siren R4 is a professional-grade wireless alarm system operating with an exceptional 750 m operating range. It utilises an advanced roller wheel system for detecting line movement, and crucially, offers extensive compatibility with external accessories.

The remarkable 750 m operating range is a defining characteristic of the R4, placing it firmly at the very top end of the market, a feat matched in our comparison only by the Delkim Txi-D.

While you’ll always need to be close enough to reach your rods quickly, this vast distance provides peace of mind when fishing big waters, especially when deploying rigs from a boat.

The Homecoming Mode for safe navigation during boat fishing is a highly innovative feature that leverages this range, allowing you to activate the alarms’ rear LEDs for guidance back to your spot in the dark.

For core detection, the R4 features the proven Roller Wheel Sensing as its factory default. This standard line movement sensing across the roller, although often superseded by faster technologies, has specific applications such as winter zigging where a slow tightening of the line is expected.

Unlike basic sets, the R4 features substantial accessory integration. It connects seamlessly to compatible external devices, including the Smart Indicators Smart Light 2 and motion sensors. A standout inclusion is the MMCX Bayonet light cable output for Nash Siren Optics & Night Glo indicators.

Furthermore, a helpful addition is the MMCX converter to attach bobbins or swingers without noise, streamlining your setup.

The R4 units are built for longevity, boasting fully digital operation for 100% waterproof reliability and are finished with a soft-touch rubber surface in black. Practical elements include grooved rubber inserts at the rod position for secure seating and a threaded clamping ring for perfect and secure alignment.

 

Special Indication for Drop-Back Bites / Latching LED / Receiver with Vibrate Mode / Night Light

The Nash Siren R4 delivers comprehensive bite indication, featuring special differentiation for drop-back bites, a latching LED, a receiver vibrate mode, and a built-in night light.

Clear visual and audible alerts are central to the R4’s design. The system includes freely selectable LED colours in Red, Blue, White, Green, or Purple, allowing anglers to customise their setup precisely.

Adding to visibility is the circumferential LED for maximum visibility from all angles, and you can choose between two brightness levels for each LED colour.

The R4 offers Special Drop-Back Indication through a special falling tone, which is highly valued. This distinct acoustic difference instantly informs the angler whether the line is being taken (a ‘run’) or slackened (a ‘drop-back’), crucial when fishing over weed or tight to snags.

The unit includes a Latching LED which remains illuminated briefly after the take has ceased, ensuring you can immediately identify which rod was triggered, especially when using multiple rods.

For discreet angling, the R4 Receiver supports a Receiver Vibrate Mode. This is complemented by three mute modes on the alarm head, allowing you to fish completely silent – ideal for stealth in the margins or in high-pressure swims.

Finally, the R4 incorporates a Night Light function, providing a subtle, low-level glow for visual location of the rod setup in the dark.

 

Volume / Sensitivity / Tone / Anti-Theft Alarm

The Nash Siren R4 provides comprehensive adjustability across its alerts and features a robust Anti-Theft Alarm.

Anglers have precise control over the alert settings: The R4 offers 8 levels of volume control, ensuring you can tailor the alert to suit various conditions, from near-silent for marginal fishing to highly audible for fishing at a distance or in high winds.

The system includes 8 levels of tone adjustment, allowing for customisation to differentiate between alarms or simply suit personal preference.

The five levels of sensitivity are powered by highly sophisticated technology, allowing precise adaptation to conditions:

The Speed Sensing settings include two levels that respond to line movement faster than 1 cm and 2 cm per second respectively to eliminate false indications from wind or minimal movement, proving highly effective for modern, fast-paced angling.

Two further sensitivity settings feature Wave Sensing technology to eliminate false indications from repeated wave action or when fishing from a boat. Alarm events are registered with movement faster than 1 cm or 2 cm per second and after 15 or 30 cm of line movement forwards or backwards over the roller.

Both Speed and Wave Sensing settings benefit from the Drift Sensing Safeguard.

This innovative safeguard protects against the rare possibility that line can ‘creep’ from a spool due to factors like weed build up on the line, where the pressure and movement are not sufficient to trigger the Speed Sensing system.

Crucially, the R4 includes an Anti-Theft Alarm. This security feature provides a valuable deterrent against opportunist theft on the bank.

The alarm is designed to trigger if the alarm head is removed from the bankstick or if attempts are made to switch the unit off while a line is engaged, alerting the angler immediately via a loud tone on both the head and the receiver.

 

Batteries Required / Box Contents

The Nash Siren R4 alarm heads require 2 x AAA batteries, while the receiver is powered by an internal rechargeable battery. The set reviewed includes 4 x Bite Alarms, 1 x Receiver and 1 x Lanyard and Clip.

The choice of battery type reflects modern design principles. The alarm heads run on readily available AAA batteries, a common, inexpensive, and easily sourced type, providing a clear advantage for spares. The receiver, however, utilises an internal rechargeable battery.

This choice is often preferred for receivers due to its long service life and the reduced need for carrying multiple spare battery types. A low battery warning indicator is included on the units to prevent unexpected power loss.

The box contents for this presentation set are extensive, including 4 x Bite Alarms, 1 x Receiver and 1 x Lanyard and Clip. The entire system is delivered with a soft-touch PVC protective cover, ensuring the equipment remains protected during transit and storage.

The alarms also feature integrated, removable, rubberised snag ears for maximum rod security.

 

What Owners Are Saying: A Customer Review Round-up

At the time of writing, we found 3 customer ratings for the Nash Siren R4 bite alarm on Amazon. On average, buyers have rated the Nash Siren R4 an impressive 5 out of 5 stars.

There are currently no written customer reviews available for the Nash Siren R4. We will update this section as soon as verified feedback from product owners becomes available.

A stand-out feature of the Nash Siren R4 is the sheer number of ways you can fine-tune the bite alarm’s sensitivity to match the prevailing water conditions. Firstly, there is the Standard Setting (Roller Wheel Sensing), which is active straight out of the box.

This standard mode also includes a dedicated application for detecting slow line tightening during the winter, known as Winter Zigging. Furthermore, the unit offers Speed Sensing, Wave Sensing, and the Drift Sensing Safeguard settings to further refine your bite detection.

In terms of pricing, the Nash Siren R4 sits firmly within the high-end bracket, similar to the Delkim Txi-D, making it the most expensive bite alarm in our comparison. Unlike its Delkim counterpart, the Nash Siren R4 features built-in drop-back detection.

Another notable feature is that the R4 comes with a unique 7-digit code, allowing you to register the unit and extend your warranty to a full 24 months.

In our bite alarm comparison, models were assessed primarily on customer reviews and overall value for money. Despite recording superior customer ratings, the Nash Siren R4 ranks 2nd, falling behind the JRC Radar DR due to its significantly higher price tag.

With its comprehensive customisation and setting options, this bite alarm is best suited for the technically minded angler. It offers an excellent upgrade for keen carp anglers looking to replace older alarms, and it is a top choice for serious carp specialists.

 

Nash Siren R4: Pros and Cons

The Nash Siren R4 is a premium, top-tier bite alarm offering extensive sensitivity options and built-in drop-back detection. Designed for specialists, it boasts excellent features like wireless compatibility with Smart Indicators, an anti-theft alarm, and a rechargeable receiver (USB-C).

While it is the most expensive model we reviewed, its quality justifies the investment, earning it 2nd place and including a 24-month extended warranty upon registration.

 

Pros

• Purchased and rated by 3 customers on Amazon
• 2nd place in our comparison
• Ultra-long range of up to 750 m
• Extensive sensitivity adjustment options
• Built-in drop-back detection
• Wirelessly compatible with Smart Indicators Bivvy Lights and Motion Sensors
• MMCX Bayonet light cable output for Nash Siren Optics & Night Glo indicators
• Anti-theft alarm
• Receiver with built-in rechargeable battery
• Premium, top-tier bite alarm that includes all the functionality of entry-level units
• 24-month extended warranty available upon registration

 

Cons

• Most expensive model in our comparison

 

The Nash Siren R4 stands out as a true premium, top-tier bite alarm, boasting comprehensive functionality that seamlessly incorporates all the features of entry-level units. Key performance features include its extensive sensitivity adjustment options and the essential built-in drop-back detection.

Crucially, the R4 Receiver also offers an ultra-long range of up to 750m, ensuring you maintain connectivity and confidence even when fishing at extreme distances or moving away from your rods.

For the technically minded specialist, the R4 offers excellent connectivity, being wirelessly compatible with Smart Indicators Bivvy Lights and Motion Sensors, and featuring an MMCX Bayonet light cable output for Nash Siren Optics & Night Glo indicators.

The R4 Receiver operates using an internal rechargeable battery and is charged via the supplied USB-C cable, and added security comes from the anti-theft alarm.

While only recently reviewed on Amazon (rated 5/5 stars by the first 3 customers), the unit provides peace of mind with a 24-month extended warranty available upon registration.

Ultimately, the R4 earns 2nd place in our comparison. The only significant drawback is the price, as it is the most expensive model we reviewed. However, for serious carp specialists, the sheer quality and feature set justify the considerable investment.

 

Nash Siren R4: Frequently Asked Questions

 

How many batteries are required in total for the Nash Siren R4 4-rod set?

For the Nash Siren R4 4-Rod Presentation Set, you will require a total of eight AAA batteries. This is because each of the four R4 alarm heads takes two AAA batteries (4 x 2 = 8).

Crucially, the R4 Receiver itself does not contribute to this total as it operates using a built-in rechargeable battery that is powered via the supplied USB-C cable. For the best performance and longest lifespan on the bank, it is highly recommended that you use high-quality alkaline batteries in the alarm heads.

 

What is the MMCX Bayonet light cable output on the bottom of the Nash Siren R4 alarms for?

The MMCX Bayonet light cable output located on the base of the Nash Siren R4 alarms is a dedicated port designed to power and illuminate compatible visual indicators.

This specific output allows you to directly connect and synchronise accessories such as the Nash Siren Optics and the Nash Night Glo range of bobbins and swing arms.

When a bite occurs, the connected indicator lights up, matching the colour of the alarm head and providing clear, instantaneous visual confirmation, which is essential for night fishing.

 

 

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Last Updated on 10/12/2025 at 19:46.