\nThe predecessor to the Cantata Series<\/a>, the Opus 21 series of components were designed to work seamlessly as a system or easily integrate with your favorite two-channel components. The Opus series is discontinued and no longer available but information is provided here in support of this popular series.<\/p>\n
Please visit the systems<\/a> page for configurations of Opus 21 systems.<\/p>\n Opus 21 CD Compact Disc Player<\/strong><\/p>\n The Opus 21 CD Player is the culmination of 10 years of digital audio development. It couples our refined multi-bit DAC design with an ATAPI-bus drive that enables ideal low-jitter design and reads all discs, including CD-R\/W, SACD-hybrid, and copy-protected discs, with ease. By moving the power supply and display to a second chassis, the critical audio circuitry is free of interference, bringing out more detail than ever. Three-dimensional circuit construction, while more costly, dramatically reduces signal path for unparalleled precision.<\/p>\n We use the finest multi-bit DACs available, as we have yet to find a superior alternative DAC architecture. Our custom DSP-based digital filter uses synchronous upsampling, as we have found that asynchronous designs create audible artifacts. By implementing volume-control in the analog domain, full performance of the converters is maintained independent of listening level.<\/p>\n \u2022 4 BurrBrown PCM1704 24-bit converters Opus 21\u00a0PS (Power Centre)<\/strong><\/p>\n The power centre serves not only as an outboard power supply, but also as a central controller for the full\u00a0Opus system.<\/p>\n It is included with purchase of the cd player and contains all of the logic necessary to control any Opus series component. When the system is powered-up, the individual components identify themselves to the power centre, which then knows what capabilities are present.<\/p>\n When the s30 amplifier is added to the system, a 100VA toroidal transformer is added to the power centre to supply the amp’s main output stages. The power centre has provision for a second 100VA transformer for future amplifier products.<\/p>\n This flexible design affords all of the benefits of external power supplies, while minimizing the number of separate chassis required.<\/p>\n Only a single power cord is required for the entire Opus 21 system.<\/p>\n S-80 integrated amplifier<\/strong><\/p>\n More power. Less complexity.<\/p>\n Built using the same design principles as the s30, the s80 integrated amplifier substitutes a highly efficient UcD modulator for the output stage. Conservatively rated at 80 Watts per channel, this amplifier will happily drive any speaker.<\/p>\n The UcD modulator overcomes all the shortcomings of previous class-D designs, thanks to a patented circuit that uses feedback after<\/i> the output filter, directly at the speaker terminals. This removes the filter from the closed-loop response and eliminates speaker dependence that is all too common in class-D amplifiers. The s80 will drive complex loads without changing character, and is just warm to the touch at any power level.<\/p>\n The s80 is a dual-mono design and includes two large toroidal transformers that are installed in the outboard power centre.<\/p>\n The complete system uses a single power cord and does not require interconnects. Just connect the speakers, forget about the equipment, and enjoy the music!<\/p>\n \u2022 80 watts\/channel S-30 integrated amplifier<\/strong><\/p>\n Less power. More music.<\/p>\n The s30 integrated amplifier is intentionally designed for low power applications, where highly efficient speakers demand the purest electronics. This means smaller power supplies, lower heat dissipation, and simpler circuits.<\/p>\n Only then can an amplifier communicate the essence of a musical performance.<\/p>\n The s30 uses a number of techniques that prove indispensible in amplifier design: eddy-current reduction, four terminal T-network capacitors, and feedback compensation optimized through listening tests. Find out why Martin Colloms called “this small power amplifier of the world’s finest.”<\/p>\n We invite you to listen for yourself and decide if this is the best amplifier you have ever heard!<\/p>\n \u2022 30 watts\/channel At 30 Watts per channel, we recommend speakers with efficiency ratings of at least 90db\/1W\/1m.<\/p>\n![\"opus21-2\"](\"http:\/\/www.resolutionaudio.dreamhosters.com\/wp-content\/uploads\/2015\/02\/opus21-2.png\")
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\n\u2022 16x digital filter upsamples to 705 kHz\/24-bit
\n\u2022 analog-domain volume control
\n\u2022 Balanced and single-ended outputs
\n\u2022 digital input operates up to 96 kHz\/24-bit enhancing two-channel home theater<\/p>\n![\"\"](\"https:\/\/www.resolutionaudio.com\/images\/PDF_Icon.gif\"){kind=icon}
Owner’s Manual<\/a><\/p>\n Notes on Upsampling<\/a><\/p>\n![\"\"](\"https:\/\/www.resolutionaudio.com\/images\/psbs.jpg\")
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\n\u2022 Dual-mono construction
\n\u2022 2 line level inputs, 1 balanced input
\n\u2022 1 digital input via cd player
\n\u2022 RS-232 input for system controller
\n\u2022 Integrated remote control
\n\u2022 CD player and amp share power supply<\/p>\n Owner’s Manual<\/a><\/p>\n![\"\"](\"https:\/\/www.resolutionaudio.com\/images\/s30bs.jpg\")
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\n\u2022 2 line level inputs, 1 balanced input
\n\u2022 1 digital input via cd player
\n\u2022 rs-232 input for system controller
\n\u2022 integrated remote control
\n\u2022 cd player and amp share power supply<\/p>\n
![\"\"](\"https:\/\/www.resolutionaudio.com\/images\/xsbs.jpg\")
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