{"product_id":"pmcactivetwenty5-21ioak","title":"PMC Active Twenty5.21i Active Bookshelf Speaker, Oak (Pair)","description":"\u003cp\u003eThe PMC Active Twenty5.21i is an active 2-way bookshelf speaker that combines amplifier and active crossover directly in the cabinet, needing only a source with volume control.\u003c\/p\u003e\u003cp\u003eSmall in volume, anything but small in performance. As the most compact speaker in the Active twenty5i series, the .21i gets the same technology as its larger siblings – two internal 100 W power amps per cabinet and an active crossover that drives each driver directly.\u003c\/p\u003e\u003ch2\u003eWhy the Active Twenty5.21i?\u003c\/h2\u003e\u003cp\u003eBecause it makes the hi-fi tower on the shelf redundant. Instead of speaker, power amp, and cable clutter, you only need a signal source with level control – a preamplifier or a streamer with volume control. The electronics inside the speaker, tuned precisely to the drivers, handle the rest. The heart of it remains PMC's \u003cstrong\u003eAdvanced Transmission Line (ATL)\u003c\/strong\u003e: a folded cabinet principle from the studio world that extracts deeper, cleaner bass from a small volume than any comparable bass-reflex cabinet.\u003c\/p\u003e\u003ch2\u003eWhat you hear\u003c\/h2\u003e\u003cp\u003eDetail-rich mids, delicate treble that's never shrill, and bass that reaches down to 46 Hz – remarkable for this cabinet size. The sound is neutral and honest: the .21i doesn't flatter, it shows what's on the recording. With the gain switch (low\/high) you match the sensitivity to your source.\u003c\/p\u003e\u003ch3\u003eWho is the Active Twenty5.21i for – and who isn't it for?\u003c\/h3\u003e\u003cp\u003eFor anyone who wants high-end sound in small to medium-sized rooms without building an electronics rack. It's also a pleasure as a high-quality effects speaker in an active surround setup. \u003cstrong\u003eStraight talk:\u003c\/strong\u003e if you just run Bluetooth on the side occasionally, you're leaving a lot on the table here – only a good source wakes up its potential. And if you want to fill a large room, you're better off with the .22i or a floorstanding model.\u003c\/p\u003e\u003ch2\u003eOur verdict\u003c\/h2\u003e\u003cp\u003eA well-thought-out, honest active speaker that the trade press praises across the board. If you want to reduce the number of boxes without giving up serious hi-fi standards, the .21i is exactly right. Hand on heart: no one has ever regretted two fewer power amps in the rack.\u003c\/p\u003e\u003ch2\u003eTechnical data\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Active 2-way bookshelf speaker with ATL cabinet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivers:\u003c\/strong\u003e 140 mm (5.5\") g-weave™ woofer, 19 mm SONOMEX™ soft-dome tweeter (PMC\/SEAS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmplification:\u003c\/strong\u003e 2 × 100 W RMS per speaker (tweeter + woofer, internal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrossover:\u003c\/strong\u003e active, analogue – crossover frequency 1.65 kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency response:\u003c\/strong\u003e 46 Hz – 25 kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffective ATL™ length:\u003c\/strong\u003e 1.72 m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain\/sensitivity:\u003c\/strong\u003e 1 Vrms = 96.5 dB SPL @ 1 m (low) \/ 106.5 dB SPL @ 1 m (high)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e balanced XLR + unbalanced RCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput impedance:\u003c\/strong\u003e \u0026gt;14 kΩ\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispersion:\u003c\/strong\u003e 100° horizontal \/ 90° vertical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMains voltage:\u003c\/strong\u003e 90–260 V, IEC C14\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable finishes:\u003c\/strong\u003e walnut, diamond black, oak\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (W × H × D):\u003c\/strong\u003e 162 × 340 × 269 mm (+ 9 mm grille)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 6 kg per unit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eDo I need an amplifier for the PMC Active Twenty5.21i?\u003c\/h3\u003e\u003cp\u003eNo, you don't need a separate power amp. With 2 × 100 W, the amplification is already built into the speaker. You just add a source with volume control – a preamplifier or a streamer with level control, connected via XLR or RCA.\u003c\/p\u003e\u003ch3\u003eWhat room size does the Twenty5.21i suit?\u003c\/h3\u003e\u003cp\u003eIdeal for small to medium-sized rooms. As a compact bookshelf speaker, thanks to its ATL cabinet it delivers bass down to 46 Hz that you wouldn't expect from its size. Placed freely on stands you get the most out of it; on a shelf it works well too.\u003c\/p\u003e\u003ch3\u003eWhat is PMC's ATL technology?\u003c\/h3\u003e\u003cp\u003eATL stands for Advanced Transmission Line, a folded cabinet principle instead of bass reflex. It uses the woofer's energy more efficiently and produces deeper, more precise bass from a compact cabinet. The technology comes from PMC's studio monitors and shapes the natural, realistic sound.\u003c\/p\u003e\u003ch3\u003eWhy buy the PMC Active Twenty5.21i from HD Zürisee?\u003c\/h3\u003e\u003cp\u003eBecause as an experienced team in Wädenswil, we don't just sell the box – we sell the right system: the right source, preamplifier, and cabling, matched to your room. Mauri takes care of delivery and setup, and we're happy to advise on questions no one answers online.\u003c\/p\u003e\u003ch2\u003ePairs well with\u003c\/h2\u003e\u003cp\u003eMore from the same sonic universe: \u003ca href=\"\/en-ch\/collections\/aktivlautsprecher\"\u003eactive speakers\u003c\/a\u003e, \u003ca href=\"\/en-ch\/collections\/regallautsprecher\"\u003ebookshelf speakers\u003c\/a\u003e, \u003ca href=\"\/en-ch\/collections\/streamer\"\u003estreamers \u0026amp; network players\u003c\/a\u003e, \u003ca href=\"\/en-ch\/collections\/vorverstarker\"\u003epreamplifiers\u003c\/a\u003e, \u003ca href=\"\/en-ch\/collections\/lautsprecher-staender\"\u003espeaker stands\u003c\/a\u003e.\u003c\/p\u003e","brand":"PMC","offers":[{"title":"Default Title","offer_id":52989552329040,"sku":null,"price":4890.0,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0932\/3262\/8048\/files\/pmc-active-twenty5-21i-regallautsprecher-eiche-stereopaar.jpg?v=1786611511","url":"https:\/\/hdzuerisee.ch\/en-ch\/products\/pmcactivetwenty5-21ioak","provider":"HD Zürisee AG","version":"1.0","type":"link"}