While the Opus 21 series of components work seamlessly as a system, they will also integrate with your favorite two-channel components.

Select at left for details of a single component.

Please visit the systems page for configurations of Opus 21 systems.

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.

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.

• 4 BurrBrown PCM1704 24-bit converters
• 16x digital filter upsamples to 705 kHz/24-bit
• analog-domain volume control
• balanced and single-ended outputs
• digital input operates up to 96 kHz/24-bit
enhancing two-channel home theater

owner's manual

The power centre serves not only as an outboard power supply, but also as a central controller for the the Opus 21 system.

It is included with purchase of the cd player and contains all of the logic necessary to control any Opus 21 series component. When the system is powered-up, the individual components identify themselves to the power centre, which then knows what capabilities are present.

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.

This flexible design affords all of the benefits of external power supplies, while minimizing the number of separate chassis required.

Only a single power cord is required for the entire Opus 21 system.

To match the resolving power and musicality of our cd player, we collaborated with Denis Morecroft of DNM Design to develop our first power amplifier. These efforts resulted in the Opus 21 s30, based on the DNM PA3 series of amplifiers. The PA3 is one of the finest sounding solid-state amplifiers ever produced. The design is somewhat deceptive: the schematics appear highly conventional, but there are details which transform the performance. Most important is the the treatment of the amplifier as a network element and the careful tuning of ultrasonic frequencies. How the amplifier handles signals beyond the audible range is more important than believed.

This is not your everyday solid-state amplifier: this approach requires a sophisticated combination of measurements and listening tests that result in a highly tuned circuit. Surprisingly, these modifications are not detectable with conventional audio amplifier measurements, which are typically limited to audio frequencies. This area of research may explain much of the sonic differences among amplifiers which have similar measured performance.

We invite you to listen for yourself and decide if this is the best amplifier you have ever heard!

• 30 watts/channel
• 2 line level inputs, 1 balanced input
• 1 digital input via cd player
• rs-232 input for system controller
• integrated remote control
• cd player and amp share power supply

At 30 Watts per channel, we recommend speakers with efficiency ratings of at least 90db/1W/1m.

owner's manual

The Opus 21 XS is the perfect complement to the Opus 21 cd player for all of your 2-channel needs. Bridging three centuries of audio replay formats, the Opus 21 XS adds high-performance playback of vinyl, FM/AM, and digital mediums in a compact integrated package.

By operating as a system, only the active circuits are enabled, thereby eliminating noise and interference. The two phono preamps are individually optimized for MC and MM cartridges, using low-noise transistors and passive RIAA equalization.

In addition to the direct connection to the s30 amplifier, the XS has both fixed and variable outputs to work with any amplifier.

Resolution Audio has taken the difficulties out of assembling a high-end audio system - just enjoy the music.

The XS adds these capabilities to the Opus 21:

• moving coil phono preamp
• moving magnet phono preamp
• FM/AM tuner with RDS
• 5 digital inputs, including USB for PC/Mac
• 2 analog inputs
• fixed and variable analog outputs
• headphone amplifier
• Opus 21 system bus for direct connection to Opus 21 cd player and s30 amplifier
• system remote control

owner's manual