Adastra RS121 120w Class-D Slave Amplifier 100V

Adastra RS121 120w Class-D Slave Amplifier 100V

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£244.02

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Listed since 6 April 2026

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Description

RS Series 100V Line Slave AmplifiersHigh power class-D 100V line slave amplifiers in a rack-mountable housing. Slave inputs accept standard line level audio from a mixer or RM series mixer amplifier. Slave outputs can be cascaded onto further RS slaves to build larger systems. All line level inputs are connectable via RCA sockets or hard-wired via removable screw terminals. A further removable screw terminal is provided for 100V input, which enables the RS series slave amplifier to extend an existing 100V installation by connecting directly to the 100V speaker feed, or indeed from a long distance 100V feed using standard double-insulated cable. A 24V terminal is provided for connection to a security or alert panel to mute the output if required during alarm triggering. Speaker outputs are either 100V or low impedance (switchable on RS121 and RS241) which is stable down to 2 Ohms, enabling multiple low impedance speakers to be connected if preferred. Designed to power medium to large installations from a mixer output or to expand existing systems.Details19" Rack-mountable 1U (120W, 240W) or 2U (360W, 480W)Efficient and lightweight Class-D amplifiersLine in and out on RCA or Euroblock terminals24V mute contacts for alarm panel muting100V signal input for extending existing speaker runsSpecificationsPower supply 175-264Vac 50Hz (IEC)Input signal Slave line in (RCA/screw terminal), 100V in (screw terminal)Output : signal Slave line out (RCA/screw terminal)Outputs : speaker 100V or 2 Ohms min. (screw terminals)Controls Master volumeTHD

Full specifications

MarqueAdastra
Référence fabricantavs232774
EAN5015972232774

Adastra RS121 120w Class-D Slave Amplifier 100V: complete technical analysis for 2026

The Adastra RS121 120w Class-D Slave Amplifier 100V is a well-regarded reference in the Périphériques informatiques category. In 2026, it remains one of the most relevant choices for those seeking to balance quality and budget. The brand Adastra has a strong reputation among consumers, reflected in its consistent availability across many partner retailers. Thanks to our comparison tool, you can see all available offers at a glance and go directly to the retailer of your choice to complete your purchase with confidence.

Who is this Périphériques informatiques for?

The Adastra RS121 120w Class-D Slave Amplifier 100V benefits from the expertise of Adastra 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 Périphériques informatiques category, this is an option we recommend without hesitation.

For intensive or occasional use

The Adastra RS121 120w Class-D Slave Amplifier 100V adapts to different levels of use in the Périphériques informatiques category. Whether you use it intensively every day or more occasionally, this Adastra 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 Adastra SD460-WIFI Dual Stereo WIFI Multi Streaming Amplifier 4 x 60W.

Against the competition

In the Périphériques informatiques market, the Adastra RS121 120w Class-D Slave Amplifier 100V is well positioned thanks to its price from £244.02 and the strength of Adastra. Our comparison tool lets you verify in real time whether this positioning still holds against other available offers.

Market price ranges in 2026

RangeIndicative price
Entry-levelUnder 2050 £
Mid-range2050 £ to 4780 £
High-endOver 4780 £

The best times to buy the Adastra RS121 120w Class-D Slave Amplifier 100V 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 Adastra RS121 120w Class-D Slave Amplifier 100V

How does the Adastra RS121 120w Class-D Slave Amplifier 100V compare to competitors in the Périphériques informatiques category?

In the Périphériques informatiques category, the Adastra RS121 120w Class-D Slave Amplifier 100V 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 Adastra RS121 120w Class-D Slave Amplifier 100V suitable for beginners?

Yes, the Adastra RS121 120w Class-D Slave Amplifier 100V is generally appreciated by both beginners and regular users of the Périphériques informatiques category. It is quick to set up and Adastra 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 Adastra RS121 120w Class-D Slave Amplifier 100V?

Refurbished versions of the Adastra RS121 120w Class-D Slave Amplifier 100V 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 Adastra RS121 120w Class-D Slave Amplifier 100V drop during the year?

Prices for the Adastra RS121 120w Class-D Slave Amplifier 100V 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 Périphériques informatiques category.

Is delivery free for the Adastra RS121 120w Class-D Slave Amplifier 100V at all retailers?

Free delivery is not guaranteed for the Adastra RS121 120w Class-D Slave Amplifier 100V 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.

Highlights

Highlights

  • RS Series 100V Line Slave AmplifiersHigh power class-D 100V line slave amplifiers in a rack-mountable housing
  • Slave inputs accept standard line level audio from a mixer or RM series mixer amplifier
  • Slave outputs can be cascaded onto further RS slaves to build larger systems
  • All line level inputs are connectable via RCA sockets or hard-wired via removable screw terminals
  • A further removable screw terminal is provided for 100V input

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