Resolution Audio Opus 21

The system "OPUS 21" of the US manufacturer Resolution Audio consists of a CD player with extension by a power amplifier (2 variants with 2x 30 W or 2x 80 W) and an extension module for tuner and phono. The CD player consists of 2 modules, a central power supply with digital display and the CD player with D/A converter. The individual modules, stacked on top of each other, are connected to each other via a plug connection attached to the housing.

This results in various configuration possibilities:

• CD player
• CD player with power amplifier (volume adjustable)

CD player with preamplifier/expansion module (tuner and phono) CD player with preamplifier/expansion module and power amplifier (2x 30 W or 2x 80 W)

Data

General

• Manufacturer: Resolution Audio
• Model: OPUS 21
• Year of manufacture: 2003 - ?
• Made in: USA
• Color: silver, black, silver/black, black/silver
• Remote control: yes
• Power consumption:
• Dimensions: 24.0 cm x 25.0 cm x 7.5 cm.
• Weight: 9 kg (packaging in wooden box)
• Original price (CD player + power supply) approx:
• New price (extension module tuner/phono) approx:
• Original price (power amplifier 30 W) approx:
• Price new (power amplifier 80 W) approx:

Connections (power supply)

• Number of inputs:
  • Power supply.
    • Mains 3-pole with mains switch and main fuse (200-240 VAC -> 800 mA)
• Number of outputs:
  • System
    • OPUS Powerlink, power supply power amplifier via 4-pole XLR
    • OPUS 21 System (25-pin female, for display and control)

Connections (CD Player Module)

• Number of inputs:
  • Digital

1x S/PDIF (RCA Cinch, 75 Ohm, 32-96 kHz / 16-24 Bit to the internal D/A converter)

• • System
    • OPUS 21 System (for display and control).
• Number of outputs:
  • Analog
    • 1x Analog (RCA Cinch)
    • 1x Analog (XLR balanced)
    • 1x Analog (DIN)

Connectors (Expansion Module)

• Number of outputs: 4
  • Analog:
    • 1x Analog output, variable (RCA Chinch).

1x analog output, fixed (RCA Chinch)

• • Digital:
    • 1x Digital Out (RCA Chinch) for connecting digital sources to D/A converters in CD player module.

Headphones:

• • • 1x headphones 6.4 mm, 10 Ohm impedance
  • Link:
    • 1x direct connection to OPUS 21 power amplifier via 4-pin XLS connector.
• Number of inputs: 4 x phono, 2x analogue, 1x USB, 4x digital, 2x antenna

phono:

• • • 1x MM Phono, 47 kOhm / 330 pF impedance / 40 dB (DIN connector) or.
    • 1x MM Phono, 47 kOhm / 330 pF impedance / 40 dB (RCA Chinch)
    • 1x MC Phono, 1 kOhm / 6800 pF impedance / 65 dB (DIN connector) or
    • 1x MC Phono, 1 kOhm / 6800 pF impedance / 65 dB (RCA Chinch)

Analogue:

• • • 2x Line Level analog input

Digital:

• • • 1x USB digital input (USB host 2.0, standard USB "B" cable (Windows or MAC OS).
    • 2x Coaxial digital input (75 Ohm) (96 kHz / 24-bit)
    • 2x Optical digital input (Toslink S/PDIF) (96 kHz / 24-bit)

Antenna:

• • • 1x MW antenna (AM)
    • 1x FM antenna (FM)

Connections (power amp module)

• Number of inputs: 3 (+ 2 system inputs).
  • Analog:
    • Analog Input 1 (XLR Balanced, 20 Vrms max, 20 kOhm).
    • Analog input 2 (RCA Cinch. 10 Vrms max, 10 kOhm)
    • Analog Input 3 (RCA RCA. 10 Vrms max, 10 kOhm).
  • System:
    • RS 232
    • Opus Power Link (4 Pin XLR) for OPUS 21 cable
• Number of outputs: 1 (+ 1 optional)
  • Speaker output (optional) with cable terminal for cable with fork connector
  • speaker output for 4 mm bananas (3-pin: R / L / ground)

Technical data (CD player module)

• Transducer:
• Frequency response:
• Dynamic range:
• Signal-to-noise ratio:
• Distortion factor:
• Channel separation:
• CD-Text: no
• MP3 support: no
• Pitch control:
• Auto play:
• Shuffle:
• Title programming:
• Repeat: yes
• Plays CD-R/CD-RW/HDCD: N/A

Specifications (Expansion Module -Tuner / Phono)

• Reception: FM, MW, LW
• Frequencies:
  • FM:
  • MW:
  • LW:
• Frequency response:
• Input sensitivity:
• Distortion Factor:
• Signal-to-noise ratio:
• Channel separation:
• Selectivity:
• Co-wave selection:
• Spurious wave selection:
• Image frequency attenuation:
• IF attenuation:
• AM suppression:
• Output level:
• RDS: yes
• Station memory: yes

Technical data (power amplifier module)

• Continuous power (at distortion).
  • 8 Ohm:
  • 4 Ohm:
• Dynamic power
  • 8 Ohm:
  • 4 Ohm:
• Total harmonic distortion:
• Attenuation Factor:
• Frequency Response:
• Signal-to-noise ratio:
• Stereo channel separation:

Special Features

• here, if available

Remarks

Other models of the same series:

Links

http://www.resolutionaudio.com/?page_id=546

https://www.reson.ch/screen/product/s30upgrade

https://www.6moons.com/audioreviews/resolution/opus21.html