{"title":"Opera Loudspeakers Bookshelf Speakers","description":null,"products":[{"product_id":"opera-loudspeakers-prima-v2-bookshelf-speaker-pair","title":"Opera Loudspeakers Prima v2 Bookshelf Speaker (Pair)","description":"\u003ch2\u003eOpera Loudspeakers Prima v2 Bookshelf Speaker (Pair) - Opera Loudspeakers\u003c\/h2\u003e\n\u003cp\u003eOpera Prima v2 is the flagship bookshelf model of the Classica line. Designed as a two-way bass-reflex system, it features custom drivers developed in collaboration with Scan-Speak: a 26 mm soft dome tweeter and an 180 mm woofer. Combining engineering, musicality, and artisanal craftsmanship, this speaker delivers a detailed, wide, and natural sound. \u003cbr\u003e\u003cbr\u003e\u003cb\u003eCabinet\u003c\/b\u003e \u003cbr\u003eThe cabinet of Opera Prima was developed with a rigorous approach from the very first design stages. Its proportions were carefully redefined to break up standing waves and minimize localized resonances. A high-density polyurethane material was used as internal damping, reducing residual reflections by more than an order of magnitude. \u003cbr\u003e\u003cbr\u003eMeasurements confirmed an extremely fast decay of the unavoidable resonances in the lower-midrange area. In listening terms, this translates into a remarkably clean and accurate reproduction, capable of rendering even the most subtle spatial cues and harmonic details with fidelity. \u003cbr\u003e\u003cbr\u003eInternal bracing was reduced to the bare minimum to avoid adding unnecessary mass or rigidity that could introduce new colorations. The top and bottom panels are angled with specific inclinations designed to reduce mutual interaction and optimize the distribution of internal waves. \u003cbr\u003e\u003cbr\u003eIn keeping with Opera’s tradition, the driver recess is internally chamfered to minimize compression effects, particularly in the midrange. The rear-firing reflex port has been carefully tuned to deliver controlled low-end extension without compromising transient speed or harmonic coherence. \u003cbr\u003e\u003cbr\u003e\u003cb\u003eDrivers\u003c\/b\u003e \u003cbr\u003eThe collaboration with Scan-Speak played a central role in this project. The drivers were not simply selected “to spec,” but developed through an iterative process focused on real-world listening—only afterward validated through measurement. \u003cbr\u003e\u003cbr\u003eThe 18 cm woofer, custom-designed for Opera Prima, strikes a fine balance between low moving mass and optimized surface damping. Its aluminum diaphragm ensures a clean response free from prominent breakup modes, while the recalibrated motor assembly—both in force and geometry—delivers excellent acceleration in the lower midrange, with generous, linear excursion. \u003cbr\u003e\u003cbr\u003eThe tweeter, also from Scan-Speak, has been slightly modified from its original version, particularly in the materials used in the rear chamber. The result is a treble response that is smooth, articulate, and coherent, with thermal management that preserves tonal neutrality even under high dynamic demands. \u003cbr\u003e\u003cbr\u003e\u003cb\u003eCrossover\u003c\/b\u003e \u003cbr\u003eThe crossover represents the critical junction between electrical design and real acoustic behavior. Rather than strictly following filter theory, each component was tuned based on in-room listening to optimize phase alignment and tonal coherence between woofer and tweeter. \u003cbr\u003e\u003cbr\u003eDespite the aluminum diaphragm, the woofer’s low-pass section requires no notch filtering: control is achieved purely through the ratio of inductance and capacitance, resulting in excellent phase integrity and natural tonal flow. The tweeter’s high-pass section was engineered to maintain tonal balance even at high output levels, with particular attention given to the coil’s thermal stability. \u003cbr\u003e\u003cbr\u003eComponent selection was guided by extensive listening sessions: Vishay resistors, Mundorf capacitors, and custom inductors made to our specifications. The entire network is mounted on an internally designed PCB with an optimized layout that faithfully preserves the sonic character of the reference prototypes. Internal wiring is made from high-purity copper of generous gauge, ensuring full dynamic expression and clarity. \u003cbr\u003e\u003cbr\u003e\u003cb\u003eDesign Philosophy\u003c\/b\u003e \u003cbr\u003eThe development of Opera Prima began with a simple yet crucial insight: while room acoustics are studied in great detail, the internal acoustics of a loudspeaker—being an enclosed space—are often overlooked. Like any confined volume, a speaker cabinet can generate unwanted resonances and colorations. \u003cbr\u003e\u003cbr\u003eOur focus was therefore on controlling internal behavior, distributing resonances across a wider frequency range to significantly reduce their amplitude. The result is a loudspeaker that delivers wide dynamic range while maintaining detail, articulation, and musicality—even at very low playback levels. \u003cbr\u003e\u003cbr\u003eParticular care was devoted to tonal coherence and soundstage reproduction. The entire system was designed to provide natural, even horizontal dispersion and a wide, stable, and believable spatial image. Thanks in large part to our close collaboration with Scan-Speak, Opera Prima offers performance well beyond what is typically expected in its class—an ideal balance of engineering precision, musical sensibility, and handcrafted attention to detail.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWhat to expect in the box:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePrima v2 Bookshelf Speaker (Pair)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eProduct Details:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType: Two-way Bass-Reflex Bookshelf Speaker\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eDrivers \u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003eTw: 26 mm Soft Dome Tweeter\u003c\/li\u003e\n\u003cli\u003eMid\/Woofer: 180mm Black anodized Alu Cone\u003c\/li\u003e\n\u003cli\u003eSensitivity (2.83V\/1m): 90 dB\u003c\/li\u003e\n\u003cli\u003eFrequency response (-3 dB): 50Hz - 21000kHz\u003c\/li\u003e\n\u003cli\u003eNominal impedance: 6 Ohms\u003c\/li\u003e\n\u003cli\u003eMinimum impedance: 3.8 Ohms\u003c\/li\u003e\n\u003cli\u003eMaximum power: 100W without clipping\u003c\/li\u003e\n\u003cli\u003eRecommended amplifier power: 25-100 W\u003c\/li\u003e\n\u003cli\u003eCrossover frequency: 2500 Hzh\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eDimension\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003eCabinet only: 237x428x390mm (lxhxd)\u003c\/li\u003e\n\u003cli\u003eComplete loudspeaker (with stand): 312x1162x449mm (lxhxd)\u003c\/li\u003e\n\u003cli\u003eNet Weight: 14 Kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAudiolab Stereo \u0026amp; Video Center\u003c\/h3\u003e","brand":"Opera Loudspeakers","offers":[{"title":"Cement Grey","offer_id":52285718921582,"sku":"OPEPRIMV2CG","price":3599.0,"currency_code":"USD","in_stock":true},{"title":"Rosewood","offer_id":52285718954350,"sku":"OPEPRIMV2R","price":3599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/1537\/4703\/files\/opera-loudspeakers-prima-v2-bookshelf-speaker-in-rosewood-pair.jpg?v=1753817515"},{"product_id":"opera-loudspeakers-callas-bookshelf-speaker-pair","title":"Opera Loudspeakers Callas Bookshelf Speaker (Pair)","description":"\u003ch2\u003eOpera Loudspeakers Callas Bookshelf Speaker (Pair) - Opera Loudspeakers\u003c\/h2\u003e\n\u003cp\u003eWith the new Callas Series, Opera wants to transfer the pleasure of listening to music inside the domestic walls by recreating a three-dimensional sound stage, focused and stable, with the correct timbre, dynamic, detail and absence of listening fatigue. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eTo achieve this, each element of the project has been subjected to careful listening tests.\u003c\/strong\u003e\u003cbr\u003eThe new Callas speakers use techniques and components that represent the state of the art in electroacoustic, starting from the cabinet, the speakers and the crossovers. The result is tonally correct, realistic, engaging, and above all enjoyable to listen to. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eThe new model Callas is an example of elegance and fits discreetly into any environment .\u003c\/strong\u003e\u003cbr\u003eCallas 2014 is a compact two-way loudspeaker (14 litres) of medium-small size which can be placed on a shelf or a stand. Its main feature is the low-frequency response, extended and controlled, combined with a typical sensitivity of floorstanding speakers. The woofer is a 7-inches, \"long-throw\", with annealed polypropylene diaphragm combined with the Scanspeak 9700 tweeter). The woofer is reflex loaded with a rear duct. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eGreat care has been placed in the elimination of the internal reflections to ensure maximum transparency in the voice reproduction.\u003cbr\u003e\u003c\/strong\u003eCallas 2014 is equipped with a switch that allows you to adjust the output of the vocal range (+2 dB between 300 and 3000 Hz). This increases greatly the flexibility of the diffuser that fits both to a greater number of environmental situations . \u003cbr\u003e\u003cbr\u003eThe new Callas produces a sound stage that expands in three dimensions with an excellent impulse response and power , dynamics and extension at low frequencies typical of systems of much higher dimensions. This speaker is also suitable for the \"near field\" listening (up to one meter to the listening point). \u003cbr\u003e\u003cbr\u003e\u003cb\u003eThe Loudspeakers\u003c\/b\u003e \u003cbr\u003eThe woofers are made by Seas on Opera specifications . It is a 7\" woofer with re-cooked polypropylene cone and rubber rim with copper ring above and below the T-shaped pole piece and 12 mm pk-pk displacement. ( a Seas technology named Excel ). This component , although used with a cutoff at 2000 Hz is able to work perfectly up to 5000 Hz . This guarantees a perfect overlap between the woofer and tweeter two octaves before and beyond the cutoff frequency. With musical programs the Callas can easily produce more than 100 SPL in the listener position with very low distortion. \u003cbr\u003e\u003cbr\u003eThe diaphragm of the midrange is made with re-coked polypropylene (annealed) . The polypropylene has a good internal damping but a low stiffness. Subjecting it to a heat stress it acquires rigidity without losing too much internal damping. The annealing, however, is a delicate process. \u003cbr\u003e\u003cbr\u003eThe Scanspeak 9700 tweeter needs no introduction: it is one of the best tweeters ever made and, in some respects, is still unsurpassed. Currently, this tweeter is used on models Malibran, Caruso, Tebaldi, Callas Grand, 2014, Callas in 2014 and also on the new Opera Quinta 2014. Besides the quality of sound, this tweeter is also highly reliable. \u003cbr\u003e\u003cbr\u003e\u003cb\u003eThe cabinet\u003c\/b\u003e \u003cbr\u003eThe Callas is a small-medium sized speaker. The internal volume is 14 liters dedicated to the woofer. The cabinet is made from MDF and veneered curved plywood. The thickness ranges from 25 mm (sides) to 50 mm of the front panel. The front panel on the inner side, in correspondence with the holes of the woofer, is milled so that turbulence does not arise in the vicinity of the speaker membranes. \u003cbr\u003e\u003cbr\u003eInternal sides are non parallel. One of the problems of the speakers are the resonances of the cabinet and the other is internal reflections. Regarding the rigidity this is guaranteed by the thickness and the weight of the walls. In order to reduce internal reflections behind the woofers there are two layers of absorbent material with pyramidal profile for a total thickness of 20 centimeters. \u003cbr\u003e\u003cbr\u003eThe absorbing material is an open cell polyurethane foam with pyramidal profile (with base 7 x 7 cm , 3 cm and 7 cm for the basic height of the pyramid ). This porous material, with its particular profile, provides an absorbing coefficient of 60% at 250 Hz and reaches almost 100% at 500 Hz. Strategically placing the right amount of this absorbent material inside the cabinet befall both reflections ( which would produce masking ) and the normal modes of the cavity which would produce annoying noise. \u003cbr\u003e\u003cbr\u003eProbably you expect to see all the inner surfaces of the cabinet covered with absorbing material. Inside the Callas model the absorbing material operates according to the principle of the \"acoustic trap\", killing the reflections inside the cabinet and reproducing a mid range of very high quality. \u003cbr\u003e\u003cbr\u003eThe ratio between the moving mass of the woofer diaphragm and the mass of the cabinet is well above 1 to 1000. That means that only a negligible part of the energy due to the motion of the speakers is transferred to the cabinet by promoting the \"horizontal definition\" or, as is often said, an articulate bass. \u003cbr\u003e\u003cbr\u003e\u003cb\u003eThe cross-over filter\u003c\/b\u003e \u003cbr\u003eThe Callas Cross-over has a low-pass section of the second order for the woofer and a high-pass section of the second order for the tweeter. These sections are completely separated and it is possible to bi-amp the diffuser. \u003cbr\u003e\u003cbr\u003eOpera recalls that once set the crossover frequency to f, the electrical phase changes over a decade before and a decade after the cut-off frequency. With a cross-over frequency at 2000 Hz this is a problem for the tweeter. This is why Opera chose only tweeter with a very wide frequency response and a wide linear displacement. And this is also why they use a second order high-pass section. \u003cbr\u003e\u003cbr\u003eTo build the cross-over Opera uses high quality components such as Mundorf capacitors, MOX resistors and OFC, autocementing, and inductors. The PCB is carefully drowned to avoid self induction between the windings that interfere with distortion and clarity. \u003cbr\u003e\u003cbr\u003e\u003cb\u003eRoom Positioning\u003c\/b\u003e \u003cbr\u003eThe sound quality produced by a pair of loudspeakers depends on a series of details: for example, orienting the speakers towards the listening point you can adjust the depth of the sound stage. You can choose, subjectively, to make the speakers \"cross over\" in front of the listener, on the head of the listener, or behind the listener's head. \u003cbr\u003e\u003cbr\u003eThe Callas model has a switch that regulates the level of the vocal frequency range so you can choose the switch position that seems subjectively better. The two speakers must be regulated in the same way.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWhat to expect in the box:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCallas Bookshelf Speaker (Pair)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eProduct Details:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDimensions: 42 x 24.5 x 42 cm (HxWxD)\u003c\/li\u003e\n\u003cli\u003eWeight: 15 Kg each\u003c\/li\u003e\n\u003cli\u003eSystem: two-way stand or shelf, Reflex with rear duct\u003c\/li\u003e\n\u003cli\u003eFinishes: Walnut, Mahogany\u003c\/li\u003e\n\u003cli\u003eSpeakers: 1 - 7 \"Seas woofer in annealed polypropylene, 1 - 1\" Scanspeak 9700 tweeter\u003c\/li\u003e\n\u003cli\u003eNumber of routes: 2\u003c\/li\u003e\n\u003cli\u003eFrequency response: 40-25000 Hz\u003c\/li\u003e\n\u003cli\u003eCross-over: 2000 Hz approx\u003c\/li\u003e\n\u003cli\u003eCross-over frequency Woofer: low pass at 12 dB \/ oct\u003c\/li\u003e\n\u003cli\u003eCross-over frequency Tweeter: high pass at 12 db octave\u003c\/li\u003e\n\u003cli\u003eMaximum power: 100 watts RMS Watts with music program with a crest factor greater than 5\u003c\/li\u003e\n\u003cli\u003eRecommended amplifier: starting from 10 Watt\u003c\/li\u003e\n\u003cli\u003eSensitivity: 89 dB \/ 2.83 Volt \/ 1 meter\u003c\/li\u003e\n\u003cli\u003eNominal Impedance: 4 ohm (Zmin\u0026gt; 3 ohm)\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003ePosition in the Environment\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003eat least 5 cm from the back wall\u003c\/li\u003e\n\u003cli\u003edistance between the speakers from 1.5 to 3 meters\u003c\/li\u003e\n\u003cli\u003eoriented towards the listening point\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAudiolab Stereo \u0026amp; Video Center\u003c\/h3\u003e","brand":"Opera Loudspeakers","offers":[{"title":"Walnut","offer_id":52698045907310,"sku":"OPECALLASW","price":6499.0,"currency_code":"USD","in_stock":true},{"title":"Mahogany","offer_id":52698045940078,"sku":"OPECALLASM","price":6499.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/1537\/4703\/files\/opera-loudspeakers-callas-bookshelf-speaker-in-walnut-pair.jpg?v=1758824921"}],"url":"https:\/\/audiolab.com\/collections\/opera-loudspeakers-bookshelf-speakers.oembed","provider":"Audiolab","version":"1.0","type":"link"}