{"product_id":"opera-callas-bookshelf-speakers","title":"Opera Callas Bookshelf Speakers","description":"\u003cp class=\"p1\"\u003eThe Opera Callas is a two-way, rear-ported standmount speaker handcrafted in Italy, built around a 7\" Seas woofer and a Scanspeak 9700 tweeter for a focused, three-dimensional soundstage. Compact in size, it is anything but small in sound. Every choice, from the acoustic-trap cabinet to the switchable midrange, was made through exhaustive listening to keep music engaging and fatigue-free, whether you are relaxing to jazz or following the finer points of a string quartet.\u003c\/p\u003e\n\u003ch2 class=\"seo-h2\"\u003eKey Features of the Opera Callas\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-Way Reflex Design:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCompact 14-liter enclosure with rear porting for extended low-frequency response\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeas Woofer:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCustom 7\" long-throw polypropylene woofer with annealed diaphragm and copper rings above and below the T-shaped pole piece\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScanspeak 9700 Tweeter:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eRenowned 1\" soft dome tweeter known for low distortion, wide dispersion, and exceptional reliability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitchable Midrange Output:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAdjustable +2 dB boost between 300 and 3000 Hz to fine-tune voice presentation to suit room acoustics and taste\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcoustic Trap Cabinet:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNon-parallel side walls with layered polyurethane foam to suppress internal reflections and cabinet resonance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-End Crossover:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e2nd-order network built with Mundorf capacitors, MOX resistors, and OFC inductors; bi-amp ready\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo Italian Finishes:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eLacquered Walnut or Mahogany over a curved cabinet with a leather-faced baffle, handcrafted in Treviso\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"seo-h2\"\u003eAcoustic Trap Cabinet\u003c\/h2\u003e\n\u003cp class=\"p1\"\u003eThe Callas cabinet isn’t just rigid, it’s a carefully engineered acoustic chamber. With 14 liters of internal volume dedicated to the woofer, the enclosure uses a combination of MDF and curved plywood veneer. The panel thickness varies from 25mm on the sides to 50mm on the front, with milled inner edges to minimize turbulence near the driver membranes. Non-parallel walls combat standing waves, and two layers of absorbent foam (20 cm thick total) act as an acoustic trap. This open-cell foam features a pyramidal profile (7x7 cm base, 3 to 7 cm height), delivering up to 100% absorption at 500 Hz. By killing reflections rather than coating the entire interior, Opera achieves a midrange with exceptional transparency and articulation.\u003c\/p\u003e\n\u003ch2 class=\"seo-h2\"\u003eSeas Woofer and Scanspeak Tweeter\u003c\/h2\u003e\n\u003cp class=\"p1\"\u003eThe woofer is a 7\" custom Seas unit with an annealed polypropylene diaphragm, optimized for a balance of internal damping and rigidity. The copper rings positioned above and below the T-shaped pole piece help suppress distortion, and its 12mm pk-pk displacement ensures clean, extended bass. Capable of maintaining accuracy well past its 2000 Hz crossover point, it allows for smooth integration with the tweeter across multiple octaves. The Scanspeak 9700 tweeter, a staple in high-end designs, is known for its low distortion, wide bandwidth, and clean integration. Used across Opera’s flagship models, it brings an unmistakable clarity and balance to the top end.\u003c\/p\u003e\n\u003ch2 class=\"seo-h2\"\u003eCrossover, Bi-Amping, and the Vocal Switch\u003c\/h2\u003e\n\u003cp class=\"p1\"\u003eThe Callas crossover employs a 2nd-order low-pass for the woofer and a 2nd-order high-pass for the tweeter, with electrical phase transitions carefully controlled across the bandwidth. Component selection is uncompromising: high-quality Mundorf capacitors, MOX resistors, and OFC inductors are laid out to minimize mutual inductance and preserve clarity. The two crossover sections are completely separated, so the Callas is bi-amp and bi-wire ready through its gold High and Low binding posts.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eA rear EQ switch lets you voice the speaker to your room. Flipped up, it lifts the 300 to 3000 Hz midrange by +2 dB, the band where voices and instruments sit and where our ears are most sensitive; flipped down, the response stays flat. That single control adapts the Callas to everything from a cozy, well-damped den to a livelier, more reflective living space.\u003c\/p\u003e\n\u003ch2 class=\"seo-h2\"\u003eFinishes and Italian Craftsmanship\u003c\/h2\u003e\n\u003cp class=\"p1\"\u003eThe Callas is built by hand in Treviso, Italy, and offered in two lacquered real-wood finishes: warm Walnut and deep Mahogany. Each cabinet pairs a curved wood side panel with a leather-faced baffle and a gloss-black top carrying the gold Callas script. A contoured magnetic grille is included for those who prefer to cover the drivers, attaching cleanly without hardware on show. The whole speaker is built to be lived with and looked at, not just listened to.\u003c\/p\u003e\n\u003ch2 class=\"seo-h2\"\u003eOpera Callas Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eSystem\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003eTwo-way standmount, rear-ported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eCabinet Volume\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003e14 liters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eFrequency Response\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003e40 – 25,000 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eWoofer\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003e1 × 7\" Seas long-throw, annealed polypropylene cone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eTweeter\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003e1 × 1\" Scanspeak 9700 dome\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eSensitivity\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003e89 dB \/ 2.83V \/ 1m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eImpedance\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003e4 ohms (Zmin \u0026gt; 3 ohms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eRecommended Amp Power\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003e10 – 100 watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eMax Power Handling\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003e100 watts RMS (music program with crest factor \u0026gt; 5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eCrossover\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003e2nd order, ~2000 Hz, bi-amp ready\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eMidrange Switch\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003e+2 dB between 300 and 3000 Hz (rear-mounted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eDimensions (H × W × D)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003e42 × 24.5 × 42 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eWeight\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003e15 kg each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eFinishes\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003eLacquered Walnut, Lacquered Mahogany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50.282%;\"\u003e\u003cb\u003eMade in\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.3603%;\"\u003eItaly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Opera","offers":[{"title":"Lacquered Walnut","offer_id":57558864331125,"sku":null,"price":6091.95,"currency_code":"EUR","in_stock":true},{"title":"Lacquered Mahogany","offer_id":57558864363893,"sku":null,"price":6091.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2222\/0805\/files\/OperaCallasBookshelfSpeakersMahoganyDiagonalview.webp?v=1788882280","url":"https:\/\/www.kronosav.com\/en-ie\/products\/opera-callas-bookshelf-speakers","provider":"Kronos AV","version":"1.0","type":"link"}