{"title":"Commercial Audio Amplifiers","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eCommercial audio amplifiers are designed to power 100V speaker systems reliably across larger or multi-zone spaces. Ideal for shops, cafés, offices and hospitality venues, they provide consistent performance, simple control and dependable operation in busy commercial environments.\u003c\/p\u003e\n\u003ch3 data-start=\"562\" data-end=\"603\"\u003eWhat is a commercial audio amplifier?\u003c\/h3\u003e\n\u003cp data-start=\"605\" data-end=\"910\"\u003eA commercial audio amplifier is built to drive multiple speakers in a 100V line audio system, allowing sound to be distributed evenly across larger areas or several zones.\u003c\/p\u003e\n\u003cp data-start=\"605\" data-end=\"910\"\u003eUnlike domestic amplifiers, commercial models are designed for continuous use, long cable runs and reliable day-to-day operation.\u003c\/p\u003e\n\u003cp data-start=\"912\" data-end=\"1039\"\u003eThey form the central hub of many commercial audio systems, powering speakers used for background music, announcements or both.\u003c\/p\u003e\n\u003ch3 data-start=\"1041\" data-end=\"1094\"\u003eDesigned for reliability in business environments\u003c\/h3\u003e\n\u003cp data-start=\"1096\" data-end=\"1350\"\u003eCommercial audio amplifiers are built with durability and stability in mind.\u003c\/p\u003e\n\u003cp data-start=\"1096\" data-end=\"1350\"\u003eThey’re designed to operate for long periods without interruption, making them suitable for retail spaces, hospitality venues and offices where audio is used throughout the day.\u003c\/p\u003e\n\u003cp data-start=\"1352\" data-end=\"1441\"\u003eClear controls and simple layouts make them easy to manage, even for non-technical staff.\u003c\/p\u003e\n\u003ch3 data-start=\"1443\" data-end=\"1487\"\u003eFlexible power for multi-speaker systems\u003c\/h3\u003e\n\u003cp data-start=\"1489\" data-end=\"1753\"\u003e100V commercial amplifiers allow multiple speakers to be connected to a single unit, making system design simpler and more scalable.\u003c\/p\u003e\n\u003cp data-start=\"1489\" data-end=\"1753\"\u003eMany models support multiple zones or inputs, allowing different areas or audio sources to be controlled independently if required.\u003c\/p\u003e\n\u003cp data-start=\"1755\" data-end=\"1848\"\u003eThis flexibility makes them ideal for growing businesses or premises with varied audio needs.\u003c\/p\u003e\n\u003ch3 data-start=\"1850\" data-end=\"1898\"\u003eStraightforward installation and integration\u003c\/h3\u003e\n\u003cp data-start=\"1900\" data-end=\"2122\"\u003eCommercial audio amplifiers are easy to integrate with ceiling and wall-mounted 100V speakers.\u003c\/p\u003e\n\u003cp data-start=\"1900\" data-end=\"2122\"\u003eThey’re commonly installed in cupboards, racks or back-office areas, keeping equipment out of sight while remaining accessible.\u003c\/p\u003e\n\u003cp data-start=\"2124\" data-end=\"2292\"\u003eChoosing a complete commercial audio system ensures the amplifier is correctly matched with compatible speakers and accessories, simplifying installation and setup.\u003c\/p\u003e\n\u003ch3 data-start=\"2294\" data-end=\"2343\"\u003eChoosing the right commercial audio amplifier\u003c\/h3\u003e\n\u003cp data-start=\"2345\" data-end=\"2413\"\u003eWhen selecting a commercial audio amplifier, it’s worth considering:\u003c\/p\u003e\n\u003cul data-start=\"2414\" data-end=\"2595\"\u003e\n\u003cli data-start=\"2414\" data-end=\"2450\"\u003e\n\u003cp data-start=\"2416\" data-end=\"2450\"\u003eNumber of speakers being powered\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2451\" data-end=\"2484\"\u003e\n\u003cp data-start=\"2453\" data-end=\"2484\"\u003eTotal system wattage required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2485\" data-end=\"2532\"\u003e\n\u003cp data-start=\"2487\" data-end=\"2532\"\u003eWhether multiple zones or inputs are needed\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2533\" data-end=\"2595\"\u003e\n\u003cp data-start=\"2535\" data-end=\"2595\"\u003eHow the system will be used (music, announcements or both)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2597\" data-end=\"2861\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eOur range of commercial audio amplifiers is carefully selected to deliver reliable performance, simple operation and seamless integration with 100V commercial speaker systems.\u003c\/p\u003e\n\u003cp data-start=\"2597\" data-end=\"2861\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eBrowse the collection below to find the right amplifier for your commercial audio setup.\u003c\/p\u003e","products":[{"product_id":"adastra-a2-200w-stereo-amplifier-with-fm-radio-bluetooth-media-player","title":"Adastra A2 2 x 200W Stereo Amplifier with FM Radio\/Bluetooth \u0026 Media Player","description":"\u003cp\u003eThe Adastra A2 is a fully featured stereo PA amplifier built for commercial venue installations, delivering 2 x 200W to cover bars, restaurants, and function rooms with clear, controlled audio.\u003c\/p\u003e\n\n\u003cp\u003eA versatile mixer section handles two microphone inputs alongside multiple stereo line sources, with a front-panel rotary switch selecting between two rear stereo inputs, a 3.5mm auxiliary input, or the built-in media player. Microphone talkover is included, making live announcements straightforward without interrupting the music feed.\u003c\/p\u003e\n\n\u003cp\u003eThe built-in media player supports MP3 playback from USB drive or SD card, and both a Bluetooth receiver and FM radio tuner with external aerial connection are included, giving you a wide choice of audio sources in a single rack-mount unit.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2 x 200W Stereo Output:\u003c\/strong\u003e Drives up to two 8 Ohm speakers per channel via 4mm binding posts, with 2 x 100W at 8 Ohms and 2 x 200W at 4 Ohms.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in Media Player:\u003c\/strong\u003e USB and SD card MP3 playback built in, keeping your source setup clean and simple.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFM Radio Tuner:\u003c\/strong\u003e Integrated FM tuner with F-type external aerial connection for reliable radio reception.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBluetooth Receiver:\u003c\/strong\u003e Stream audio wirelessly from smartphones, tablets, or laptops directly to the amplifier.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Microphone Inputs:\u003c\/strong\u003e Two 6.3mm mono jack mic inputs with talkover, suitable for announcements and live PA use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass D Amplification:\u003c\/strong\u003e Efficient Class D design with full protection against thermal, over-current, over-voltage, and short-circuit conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eSpecifications\u003c\/h6\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Power (4 Ohms):\u003c\/strong\u003e 2 x 200W RMS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Power (8 Ohms):\u003c\/strong\u003e 2 x 100W RMS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmplifier Class:\u003c\/strong\u003e Class D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz – 20kHz ±0.5dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e 92dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e \u0026lt;0.1%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMicrophone Inputs:\u003c\/strong\u003e 2 × 6.3mm jack (mono)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLine Inputs:\u003c\/strong\u003e Line 1: L+R (6.3mm jack \/ RCA), Line 2: L+R (RCA)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAuxiliary Input:\u003c\/strong\u003e 3.5mm stereo jack\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Sensitivity (Line):\u003c\/strong\u003e 0.775Vrms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Sensitivity (Aux):\u003c\/strong\u003e 0.480Vrms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e 20k Ohms (balanced), 10k Ohms (unbalanced)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLine Output:\u003c\/strong\u003e 2 × RCA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpeaker Outputs:\u003c\/strong\u003e 4mm binding posts (2 channels)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAudio Source:\u003c\/strong\u003e USB\/SD MP3 playback, FM tuner, Bluetooth receiver\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e 2.3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAntenna Connection:\u003c\/strong\u003e F-type (FM tuner)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e Thermal, over-current, over-voltage, short-circuit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 230Vac, 50Hz (IEC)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuse:\u003c\/strong\u003e F5A, 250V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (W × D × H):\u003c\/strong\u003e 482.0 × 260.0 × 88.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 5.21 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eWhat You Get\u003c\/h6\u003e\n\n\u003cul\u003e\n\u003cli\u003e1 x Amplifier\u003c\/li\u003e\n\u003cli\u003e1 x Power Lead\u003c\/li\u003e\n\u003cli\u003e2 x Rack Ears\u003c\/li\u003e\n\u003cli\u003e1 x Remote Control\u003c\/li\u003e\n\u003cli\u003e1 x User Manual\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adastra","offers":[{"title":"Default Title","offer_id":29584947281984,"sku":"953.402UK","price":189.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0192\/6791\/1744\/files\/adastra-a2-2-x-200w-stereo-amplifier-with-fm-radiobluetooth-media-player-amplifiers-adastra-203379.jpg?v=1770158896"},{"product_id":"adastra-a4-dual-zone-200w-stereo-amplifier-with-fm-radio-bluetooth-media-player","title":"Adastra A4 4 x 200W Stereo Amplifier with FM Radio\/Bluetooth \u0026 Media Player","description":"\u003cp\u003eThe Adastra A4 is a fully featured dual stereo PA amplifier designed for commercial installations such as bars, restaurants, and function rooms, delivering 4 x 200W across two independent stereo output zones.\u003c\/p\u003e\n\n\u003cp\u003eEach output zone has its own source selector, bass, and treble controls, letting you tailor the audio independently for different areas of a venue. Microphone inputs 1 and 2 are live to both zones at all times, making announcements and background music easy to manage simultaneously.\u003c\/p\u003e\n\n\u003cp\u003eThe built-in media player supports USB and SD card playback of MP3 audio tracks, and a Bluetooth receiver is included for wireless streaming. A front-panel 3.5mm auxiliary input offers a quick connection for additional sources alongside the two rear stereo line inputs.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Zone Output:\u003c\/strong\u003e Two independent stereo zones, each with individual source selection, bass, and treble controls for flexible venue audio management.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Output Power:\u003c\/strong\u003e Delivers 4 x 100W at 8 Ohms or 4 x 200W at 4 Ohms, with speaker connections via 4mm binding posts on the rear panel.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in Media Player:\u003c\/strong\u003e Plays MP3 files directly from USB drive or SD card, removing the need for a separate source device.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBluetooth Receiver:\u003c\/strong\u003e Wireless audio streaming from smartphones or tablets straight to the amplifier.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Microphone Inputs:\u003c\/strong\u003e Two 6.3mm jack mic inputs with talkover functionality, both active across all zones simultaneously.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass D Amplification:\u003c\/strong\u003e Efficient Class D design with built-in thermal, over-current, over-voltage, and short-circuit protection for reliable long-term use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eSpecifications\u003c\/h6\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Power (8 Ohms):\u003c\/strong\u003e 4 x 100W\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Power (4 Ohms):\u003c\/strong\u003e 4 x 200W\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmplifier Class:\u003c\/strong\u003e Class D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz – 20kHz ±0.5dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e 92dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e \u0026lt;0.1%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMicrophone Inputs:\u003c\/strong\u003e 2 × 6.3mm jack (mono)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLine Inputs:\u003c\/strong\u003e Line 1: L+R (6.3mm jack \/ RCA), Line 2: L+R (RCA)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAuxiliary Input:\u003c\/strong\u003e 3.5mm stereo jack\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Sensitivity (Line):\u003c\/strong\u003e 0.775Vrms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Sensitivity (Aux):\u003c\/strong\u003e 0.480Vrms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e 20k Ohms (balanced), 10k Ohms (unbalanced)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLine Output:\u003c\/strong\u003e 4 × RCA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpeaker Outputs:\u003c\/strong\u003e 4mm binding posts (4 channels)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAudio Source:\u003c\/strong\u003e USB\/SD MP3 playback, Bluetooth receiver\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e 2.3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAntenna Connection:\u003c\/strong\u003e F-type (FM tuner)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e Thermal, over-current, over-voltage, short-circuit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 230Vac, 50Hz (IEC)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuse:\u003c\/strong\u003e T5A, 250V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (W × D × H):\u003c\/strong\u003e 482.0 × 260.0 × 88.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 5.98 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eWhat You Get\u003c\/h6\u003e\n\n\u003cul\u003e\n\u003cli\u003e1 x Amplifier\u003c\/li\u003e\n\u003cli\u003e1 x Power Lead\u003c\/li\u003e\n\u003cli\u003e2 x Rack Ears\u003c\/li\u003e\n\u003cli\u003e1 x Remote Control\u003c\/li\u003e\n\u003cli\u003e1 x User Manual\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adastra","offers":[{"title":"Default Title","offer_id":29584947544128,"sku":"953.404UK","price":249.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0192\/6791\/1744\/files\/adastra-a4-4-x-200w-stereo-amplifier-with-fm-radiobluetooth-media-player-amplifiers-adastra-964034.jpg?v=1770156620"},{"product_id":"adastra-a6-tri-stereo-amplifier-6x200w","title":"Adastra A6 6 x 200W Stereo Amplifier with FM Radio\/Bluetooth \u0026 Media Player","description":"\u003cp\u003eThe Adastra A6 is a three-zone stereo PA amplifier delivering 6 x 200W across three independent stereo outputs, designed for installations requiring high-quality stereo sound across multiple rooms or listening areas.\u003c\/p\u003e\n\n\u003cp\u003eEach output zone has its own rotary source selector, letting you independently choose between two rear stereo line inputs, a front 3.5mm auxiliary input, or the built-in media player. Both microphone inputs remain live across all three zones simultaneously, so announcements reach every area without any additional routing.\u003c\/p\u003e\n\n\u003cp\u003eSpeakers connect via Euroblock terminals on the rear panel, offering a secure and tidy wiring solution suited to professional installations. 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The XLR mic input carries switchable +20V phantom power for condenser microphones, and the rear panel offers individual mic\/line switching for inputs 2 and 3.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eScalable Power Output:\u003c\/strong\u003e Available in five power ratings from 60W to 480W, so you can match the amplifier to the size and demands of the installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAB+\/FM, Bluetooth \u0026amp; USB\/SD:\u003c\/strong\u003e Three built-in audio sources mean background music can be played without any additional equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-Channel Mixing:\u003c\/strong\u003e XLR mic input with phantom power, two mic\/line jack inputs, and two RCA line inputs give flexible source management across a range of input types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-Zone Switched Outputs:\u003c\/strong\u003e Four independently switched 100V line outputs plus one 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Ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Sensitivity (Line):\u003c\/strong\u003e -15 dBV (-18.5 dBV line 5)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Impedance (Inputs 2–5):\u003c\/strong\u003e 1k Ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine Output:\u003c\/strong\u003e RCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhantom Power:\u003c\/strong\u003e +20V switchable (XLR mic input 1)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e 5.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio Sources:\u003c\/strong\u003e DAB+\/FM tuner, USB\/SD player, Bluetooth receiver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEqualiser:\u003c\/strong\u003e Bass 100 Hz ±10 dB \/ Treble 10 kHz ±10 dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD:\u003c\/strong\u003e \u0026lt;1.0%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmergency Control:\u003c\/strong\u003e 24V contacts — mutes all except Mic 1 when triggered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMains Power Supply:\u003c\/strong\u003e 170–264 Vac, 50 Hz (IEC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC Power:\u003c\/strong\u003e 24 Vdc (screw terminals)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse:\u003c\/strong\u003e T2A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRack Format:\u003c\/strong\u003e 2U 19\" (rack ears supplied)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (W × H × D):\u003c\/strong\u003e 433.0 × 88.0 × 320.0 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.98 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eWhat You Get\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Amplifier\u003c\/li\u003e\n\u003cli\u003e1 x Power Lead\u003c\/li\u003e\n\u003cli\u003e2 x Rack Mounting 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USB","description":"\u003cp\u003eThe Adastra RMC Series 100V Mixer-Amplifier is a comprehensive commercial sound solution combining a 5-channel mixer with a built-in CD player, DAB+\/FM tuner, Bluetooth 5.0 receiver, and USB\/SD media player — all in a single 19\" rack-mount unit.\u003c\/p\u003e\n\u003cp\u003eAvailable in 120W and 240W output variants, it is designed to drive 100V line speaker systems or low-impedance 4–16 Ohm speaker loads, making it suitable for a wide range of commercial installations including restaurants, retail environments, hotels, schools, and leisure facilities.\u003c\/p\u003e\n\u003cp\u003eThe amplifier section uses a Class AB design paired with a digital switch-mode power supply and a 100V transformer, delivering reliable, energy-efficient power output. Both mains (170–264 Vac) and 24 Vdc operation are supported, giving flexibility for installations with backup power requirements.\u003c\/p\u003e\n\u003cp\u003eFive input channels cover a balanced XLR microphone input with switchable +20V phantom power and Vox override, two mic\/line jack inputs, and two RCA line inputs. A rear-panel Vox switch allows background music to be ducked automatically when the mic input is active, keeping announcements clear without manual intervention. An optional remote control (SPR000708) is available separately.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in CD Player:\u003c\/strong\u003e A slot-feed CD player is included alongside USB\/SD and Bluetooth playback, so the system handles virtually any audio source without additional equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAB+ and FM Tuner:\u003c\/strong\u003e Receive digital and analogue radio stations directly through the unit, removing the need for an external tuner.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth 5.0:\u003c\/strong\u003e Wirelessly pair a smartphone or tablet for convenient audio streaming without cables.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100V or 4–16 Ohm Output:\u003c\/strong\u003e Compatible with both 100V line speaker systems and standard low-impedance speakers, giving flexible installation options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhantom Power and Vox Override:\u003c\/strong\u003e The XLR mic input supports condenser microphones via switchable +20V phantom power, and the Vox function automatically lowers background music during announcements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass AB Amplifier with Switch-Mode PSU:\u003c\/strong\u003e Efficient power delivery with low distortion (THD under 1%) across the full output range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e19\" Rack Mountable:\u003c\/strong\u003e Supplied with rack-mount ears as standard, ready to drop into a standard equipment rack.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eSpecifications\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Adastra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e RMC120D \/ RMC240D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Power (RMS):\u003c\/strong\u003e 120 W \/ 240 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeaker Outputs:\u003c\/strong\u003e 100V \/ 4–16 Ohms \/ COM terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e 1 × XLR mic (balanced), 2 × mic\/line jack, 2 × RCA line\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Sensitivity (Mic 1):\u003c\/strong\u003e -53 dBV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Impedance (Mic 1):\u003c\/strong\u003e 5k Ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Sensitivity (Line):\u003c\/strong\u003e -15 dBV (-18.5 dBV line 5)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Impedance (Inputs 2–5):\u003c\/strong\u003e 1k Ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine Output:\u003c\/strong\u003e RCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhantom Power:\u003c\/strong\u003e +20V switchable (XLR mic input 1)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth 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installations, available in four output options: 120W (1U), 240W (1U), 360W (2U), and 480W (2U).\u003c\/p\u003e\n\u003cp\u003eSlave amplifiers like the RS Series are used alongside a mixer-amplifier to increase system capacity — adding more speakers or extending coverage into additional areas without replacing the existing head unit. The RS Series accepts a standard line-level signal from any mixer or compatible mixer-amplifier, and multiple units can be cascaded via the slave line output to build larger systems as requirements grow.\u003c\/p\u003e\n\u003cp\u003eA particularly useful feature is the 100V signal input, which allows the RS Series to be connected directly to an existing 100V speaker feed rather than a dedicated line-level output. This makes it straightforward to extend a 100V installation using standard double-insulated cable over long cable runs, without requiring a separate signal cable back to the source.\u003c\/p\u003e\n\u003cp\u003eSpeaker output is 100V line or low-impedance (stable down to 2 Ohms on the RS121 and RS241), with all connections made via screw terminals for a secure, permanent installation. A 24V mute terminal is provided for integration with alarm or security panels, allowing the output to be silenced automatically when triggered.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass-D Efficiency:\u003c\/strong\u003e Lightweight and energy-efficient Class-D amplifier design reduces heat output and running costs, making it well suited to permanent commercial installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Signal Inputs:\u003c\/strong\u003e Accepts line-level audio via RCA sockets or Euroblock screw terminals, plus a dedicated 100V input for extending existing speaker runs directly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCascadable Slave Output:\u003c\/strong\u003e Line-level slave output allows multiple RS units to be daisy-chained, giving straightforward scalability for growing installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100V or Low-Impedance Output:\u003c\/strong\u003e Switchable between 100V line and low-impedance operation (down to 2 Ohms on 120W and 240W variants), accommodating different speaker configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e24V Alarm Mute:\u003c\/strong\u003e Screw-terminal mute contacts allow integration with a security or alert panel to silence the output during alarm activation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e19\" Rack Mountable:\u003c\/strong\u003e 1U format for the 120W and 240W variants, 2U for the 360W and 480W variants — supplied with rack or surface mounting ears as standard.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eSpecifications\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Adastra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e RS121 \/ RS241 \/ RS360 \/ RS480\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Power (RMS):\u003c\/strong\u003e 120 W \/ 240 W \/ 360 W \/ 480 W (variant dependent)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRack Format:\u003c\/strong\u003e 1U (120W, 240W) \/ 2U (360W, 480W)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeaker Outputs:\u003c\/strong\u003e 100V or 2 Ohms min. (screw terminals)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Input:\u003c\/strong\u003e Slave line in via RCA or Euroblock screw terminal; 100V in via screw terminal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Output:\u003c\/strong\u003e Slave line out via RCA or Euroblock screw terminal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControls:\u003c\/strong\u003e Master volume\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMute:\u003c\/strong\u003e 24V alarm contacts (screw terminal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 90 Hz – 20 kHz (100V) \/ 17 Hz – 90 kHz (2 Ohms)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD:\u003c\/strong\u003e \u0026lt;1.0%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMains Power Supply:\u003c\/strong\u003e 175–264 Vac, 50 Hz (IEC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse:\u003c\/strong\u003e T1A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (W × H × D):\u003c\/strong\u003e 433.0 × 44.0 × 267.0 mm (120W variant)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.8 kg (120W variant)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eWhat You Get\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Amplifier\u003c\/li\u003e\n\u003cli\u003e1 x Power Lead\u003c\/li\u003e\n\u003cli\u003e2 x Rack Mounting Ears\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adastra","offers":[{"title":"120W","offer_id":56258043543932,"sku":"953.201UK","price":225.0,"currency_code":"GBP","in_stock":true},{"title":"240W","offer_id":56258043576700,"sku":"953.202UK","price":259.0,"currency_code":"GBP","in_stock":true},{"title":"360W","offer_id":56258043609468,"sku":"953.203UK","price":379.0,"currency_code":"GBP","in_stock":true},{"title":"480W","offer_id":56258043642236,"sku":"953.204UK","price":459.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0192\/6791\/1744\/files\/adastra-rs-series-100v-line-slave-amplifiers-100v-amplifiers-adastra-120w-295158.jpg?v=1770159141"},{"product_id":"adastra-v-series-dual-zone-100v-mixer-amplifiers-with-dab-bluetooth-usb","title":"Adastra V Series Dual Zone 100V Mixer Amplifiers with DAB, Bluetooth \u0026 USB","description":"\u003cp\u003eThe Adastra V Series is a dual-zone 100V mixer-amplifier with a Class-D amplifier section, designed to deliver independent audio to two separate areas from a single rack-mount unit.\u003c\/p\u003e\n\u003cp\u003eAvailable in 2 × 120W and 2 × 240W output variants, it is built for commercial and leisure installations where different spaces need different audio — such as a bar and a dining room, a retail floor and a stockroom, or a hotel lobby and a function suite. Each zone is independently controlled and can carry a different source, making it a genuinely versatile solution for multi-area sound.\u003c\/p\u003e\n\u003cp\u003eBuilt-in audio sources include a DAB+\/FM tuner, Bluetooth 5.0 receiver, and a USB\/SD media player, all accessible without any external playback equipment. A rotary source selector per zone switches between two unbalanced line inputs, an auxiliary input, or the internal media player, giving each zone its own independent programme selection.\u003c\/p\u003e\n\u003cp\u003eThree balanced mic\/line input channels are live to both zones simultaneously, with switchable +20V phantom power on the XLR inputs and selectable priority for channel 1. Front-panel jack inputs and rear-panel combo XLR\/jack and screw terminals give flexible connection options for both temporary and permanently wired microphone sources. 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