Cyrus MR3

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The Cyrus MR3 is an integrated amplifier with only 2 inputs (CD and tuner), but in addition to its amplifier output further 2(3) preamplifier outputs which can output the signal of the two inputs individually, i.e. any source at any volume. For each of the additional preamplifier outputs a stereo power amplifier or active speakers are required. The remote control is done via a radio transmitter, so that the MR3 can be controlled from any room.

Data

General

• Manufacturer: Mission Group
• Model: MR 3
• Year built: 1996 -
• Made in: [1] England, Huntingdon
• Colour: black
• Remote control: yes (radio)
• Power consumption:
• Dimensions (H x W x D): 73 x 215 x 360 mm.
• Weight:
• New price approx:

Connections

Connections

• Number of inputs: 2
  • internal (Cyrus specific):
    • MC bus (Cyrus - component connection for remote control).
    • mains connection
  • external
    • CD
    • tuner
• number of outputs: 6
  • internal (Cyrus specific):
    • MC bus (Cyrus - component connection for remote control).
  • external
    • Loudspeaker connection of the amplifier (Zone 1)
    • Analog Out: Chinch (Zone 1)
      • Connection of additional MR3 modules or
      • external power amplifier or
      • additional power amplifier (see Bi-Amping)
    • Analog Out: Chinch (Zone 2)
    • Analog Out: Chinch (Zone 3)
    • Analog Out: CD
      • signal looped through from the CD input for connecting the CD signal to an external input (e.g.: integrated amplifier)
    • Analog Out: Tuner
      • signal looped through from the tuner input to connect the tuner signal to an external input (e.g.: integrated amplifier)

Technical data

• Continuous power
  • Zone 1: 2 x 40 W (8 Ω)
• Total harmonic distortion:
• Attenuation factor:
• Frequency response:
  • Zone 1 - 3: 1 Hz - 100 kHz (-3dB).
  • Zone 1: 2 Hz - 80 kHz (-3 dB).
• Distortion:
  • Zone 1 - 3: 0.005 %
  • Zone 1: 0.05 % / 1 kHz, 8 Ω
• Signal-to-noise ratio:
• Stereo channel separation:
• Balance: yes (double assignment volume control).
• Tone control:
  • Bass: no

treble: no

• Loudness: no
• High Filter: no
• Low Filter (Subsonic): no
• Mute: yes
• Direct/Line-Straight: 2

images

Figure 1: Cyrus MR3' front view.
 
Controls (from left to right)
Above:
* Mute
* Lock
* Volume and balance (by key combination the volume control becomes the balance control)
bottom:
* On / Off switch for listening zones
High level inputs CD and Tuner 

800px

Figure 2: Cyrus MR3 Rear View. 

* Speaker connection right for listening zone 1 (internal 40 W amplifier).
* High level input CD
High level input TU
High level output CD (looped signal of input CD)
High level output TU (looped signal of input TU)
Preamplifier outputs for listening zone 1
Preamplifier outputs for listening zone 2
* Preamplifier outputs for listening zone 3
MC-Bus (Cyrus internal system bus for central control)
* Loudspeaker connection left for listening zone 1 (internal 40 W amplifier)

* Mains switch
* Fuse
* Power socket
* Antenna cable for radio remote control "X-pander

Figure 3: Cyrus MR3 radio remote control "X-pander"

* Selection listening zone 1
* Selection listening zone 2
* Selection listening zone 3

Balance (select listening zone + Balance + Shift left / right)
Mute (select listening zone + mute)
Volume (AUswahl listening zone + volume)
Shift (CD track or tuner station)

Further information

Special Features

• Radio remote control

Optional Equipment

One MR3 can be used to provide sound to 3 listening zones. Up to four MR3 can be connected in series. Thus 12 listening zones can be sounded.

The signals of the inputs are looped through "loss-free", so that the MR3 can be integrated into any system.

Author's note: The looping through is by no means "loss-free" but quite audible, 
                 if the other equipment allows it.
                 The integrated integrated amplifier corresponds approximately to that of the
                 Cyrus Straight Line, Cyrus Quattro, XPA
                 The sound quality does not come close to the quality of the Cyrus IIIi but is better
                 than most other devices.

A high-quality power cord leads, as with all Cyrus - components, to a clear improvement of the sound quality.

Author's note: In my test with Groneberg Series 3 - mains cables (approx. 50 € 1m assembled / or approx. 10 €/m)

Info

As additional power amplifiers for the further listening zone Cyrus recommends:

• Cyrus XPA - Stereo power amplifier with 2 x 50 W (70 W) with automatic switch-on and switch-off depending on the input signal.
• Cyrus Smartpower - stereo power amplifier
• any other Cyrus Power Amplifier
• any other power amplifier

Author's note: for the quality of the MR3's preamp output and the long signal paths (via RCA cables) 
                 or long loudspeaker cables to further listening areas the following power amplifiers are in my opinion 
                 too bad, because their potential cannot unfold.

                 * Cyrus Power - Stereo power amplifier with 2 x 50 W(70 W) 
                                                 resp. 100 W monoblock (with PSX-R)
                 * Cyrus aPA7 - Monoblock with 1 x 150 W each (240 W) 

Source:

• Cyrus product catalog 1997

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