Name: Radio Design Labs ST-ACR2
Brand: Radio Design Labs
SKU: f4d8453d-e7a8-4962-8d6b-b4fc4ed787ca
Availability: InStock

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Description

Line-Level Audio Controlled Relay - 5 to 50 s delayThe ST-ACR2 is an Audio Controlled Relay in the STICK-ON? series. These products are designed for quick convenient installation and reliable operation in a variety of control applications. The ST-ACR2 is designed to switch on line level sources.Two multiturn trimmers are provided. The SENS potentiometer adjusts the audio input sensitivity. A threshold LED facilitates accurate adjustment. The module can be set to trigger on signals between -30 dBu and 0 dBu. The DELAY control sets the time required for the relay to release when the audio drops below the threshold.The delay adjustment range for the ST-ACR2 is from 5 seconds to 50 seconds.Features:• Switching Controlled by Audio Signal• Sensing of Line-Level Signal• Silence Sensing• DPDT Switching Contacts• Open-Collector SLAVE Output

Full specifications

Marque	Radio Design Labs
Référence fabricant	stacr2
Features	&bull

Radio Design Labs ST-ACR2: complete technical analysis for 2026

With the Radio Design Labs ST-ACR2, Radio Design Labs offers a solution suited to everyday needs in 2026. Available from 2 retailers on Compiral, this product benefits from real-time price comparison. Each offer is verified and updated several times a day to ensure you have the freshest information. Our platform calculates the total price including delivery costs, so you can identify the true best offer among all listed retailers.

Who is this Informatique for?

The Radio Design Labs ST-ACR2 benefits from the expertise of Radio Design Labs in this category. Its design meets current market standards and satisfies even the most demanding users in their everyday activities. The brand's reliability translates into positive feedback from regular buyers, who particularly appreciate the consistency between the promises of the product sheet and the real-world experience. For the Informatique category, this is an option we recommend without hesitation.

For intensive or occasional use

The Radio Design Labs ST-ACR2 adapts to different levels of use in the Informatique category. Whether you use it intensively every day or more occasionally, this Radio Design Labs product offers appreciated versatility. Regular users value its reliability over time, while occasional users appreciate how easy it is to pick up without any special training. For even more demanding use, also check the Radio Design Labs DD-RN31.

Against the competition

In the Informatique market, the Radio Design Labs ST-ACR2 is well positioned thanks to its price from £164.59 and the strength of Radio Design Labs. Our comparison tool lets you verify in real time whether this positioning still holds against other available offers.

Market price ranges in 2026

Range	Indicative price	For whom	What you get
Entry-level	Under 384300 £	Tight budget, occasional use	Essential features, reliable for beginners
Mid-range	384300 £ to 896710 £	Regular daily use	Good value for money, solid performance
High-end	Over 896710 £	Demanding users	The best of the category, all advanced features

The best times to buy the Radio Design Labs ST-ACR2 at a lower price are Black Friday in November, the January sales and the summer sales in July. Our price history lets you judge whether the current price is a genuine bargain or whether it is worth waiting a few weeks. Outside these periods, flash promotions remain frequent among Compiral's partner retailers.

Frequently asked questions about Radio Design Labs ST-ACR2

How does the Radio Design Labs ST-ACR2 compare to competitors in the Informatique category?

In the Informatique category, the Radio Design Labs ST-ACR2 occupies a specific market segment. Compared to other available models, it stands out mainly through the balance between its features and its price. To compare objectively, consult the detailed spec sheet on this page and compare specifications with other similar products listed on our comparison tool.

Is the Radio Design Labs ST-ACR2 suitable for beginners?

Yes, the Radio Design Labs ST-ACR2 is generally appreciated by both beginners and regular users of the Informatique category. It is quick to set up and Radio Design Labs usually provides clear documentation. If you are new to this product category, consult the spec sheet on this page to identify the key criteria to check before making your choice.

Is there a refurbished version of the Radio Design Labs ST-ACR2?

Refurbished versions of the Radio Design Labs ST-ACR2 may be available from certain Compiral partner retailers. These refurbished products allow you to save between 20% and 40% compared to the new price while still benefiting from a warranty. Check availability in our offers table and review the warranty conditions offered by the retailer.

When do prices for the Radio Design Labs ST-ACR2 drop during the year?

Prices for the Radio Design Labs ST-ACR2 typically drop during Black Friday (November), the January sales and the summer sales (July). Promotional deals are also common around Cyber Monday and the holiday season. Our price history lets you spot trends and assess whether a price drop is likely soon in the Informatique category.

Is delivery free for the Radio Design Labs ST-ACR2 at all retailers?

Free delivery is not guaranteed for the Radio Design Labs ST-ACR2 at every retailer. Some include it in their price, others charge separately. On Compiral, use the free delivery filter to display only offers with free postage. The total price shown in our table always includes delivery costs for a true cost comparison.