Resolution Audio Stereo Amplifier Opus 21 User Guide

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Turn off any associated components prior to connecting the Opus 21.  
This minimizes the chance of momentary electrical surges disturbing your system.  
Connect the OpusLink interconnect to both the cd player and Power Centre.  
Note that the cable can only be installed in one direction. Secure the connectors by hand-tightening the  
integral screws.  
Connect the Opus PowerLink cable to both the s30 and Power Centre.  
Note that the cable can only be installed in one direction.  
Connect your speaker cables to the s30 using either spade lugs or banana jacks.  
The optional binding posts work best with spade lugs. Ensure proper polarity, which is indicated on the top of  
the connector. If your speaker is fitted with a separate ground connection, it may be attached to the center  
(yellow) banana jack, which is returned to the amplifier star-ground.  
With the power switch in the OFF position, attach the power cord and connect it to your outlet.  
The OFF position is selected when the O symbol on the switch is depressed.  
Turn on the main power switch.  
The ON position is selected when the | symbol on the switch is depressed. The Opus 21 will take a few seconds  
to initialize and read the disc if present. The s30 selects the cd as the default input.  
Turn on the rest of your system.  
It is a good habit to turn the amplifier on last, and off first, to prevent surges and transients from reaching  
your loudspeakers.  
Insert a disc and press PLAY, or select another input.  
The s30 amplifier will automatically select the cd input when a disc is played. Analog inputs may be selected  
from the remote control or directly from the front panel. The digital input of the cd player is accessed only from  
the remote control.  
The Opus 21 is designed to remain powered continuously. In standby mode, the display is turned off and the  
output is muted, but all of the circuitry remains powered. Output-stage bias current is also reduced in standby.  
If you do not intend to use the player for an extended period of time, the power may be removed via the  
power switch in the rear. When power is re-applied, the Opus 21 will warm up and sound its best in about 1 hour.  
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The lightning flash with an arrowhead symbol, within  
an equilateral triangle, is intended to alert the user to  
the presence of uninsulated "dangerous voltage"  
within the product's enclosure that may be of sufficient  
magnitude to constitute a risk of electric shock to  
persons.  
CAUTION  
RISK OF ELECTRICAL SHOCK  
DO NOT OPEN  
CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK,  
DO NOT REMOVE COVER.  
The exclamation point within an equilateral triangle  
is intended to alert the user to the presence of important  
operating and maintenance (servicing) instructions in  
the literature accompanying the product.  
NO USER-SERVICEABLE PARTS INSIDE.  
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.  
Check that the operating voltage of your unit  
is identical to that of your local power supply.  
Clean the chassis, faceplate, and controls with a soft  
cloth lightly moistened with mild detergent solution. Do  
not use any type of abrasive pad, scouring powder, or  
solvent such as alcohol or benzine.  
Replace fuses only with identically rated  
fuses.  
Do not discard the original box and packing materials.  
When shipping the unit to another location or for repair  
work, repack in original material.  
To reduce risk of electrical shock, keep the  
unit dry and grounded. Do not operate the  
unit near water.  
Do not attempt to service this product. All servicing  
should be referred to qualified service personnel.  
If the unit causes RF interference with another  
product, move one unit or both until the  
interference is eliminated. If the interference  
cannot be sufficiently reduced, cease  
operation and consult Resolution AV.  
Do not install the unit in a location near heat sources  
such as radiators or heat ducts, or in a place subject  
to mechanical vibration or shock.  
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Resolution AV warrants all products against faulty workmanship or defective materials for a period of  
three (3) years from date of shipment, with the exception of transport mechanisms. Transport mechanisms  
are covered for one (1) year. If a defect occurs within this period, Resolution AV will repair, replace, or issue  
a credit for the product at our discretion. Prior to return, authorization is required. All merchandise must be  
returned in the original packing material with all accessories. If a product is recalled and it is not returned  
within 90 days, the warranty is void. This warranty is not transferrable. Resolution AV assumes no  
responsibility for defects resulting from misuse, neglect, improper installation, unauthorized repair, alteration,  
inadequate packing, or accident. No other obligations expressed or implied shall be assumed by  
Resolution AV.  
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SAVE YOUR SALES SLIP AND REGISTER AT WWW.RESOLUTIONAUDIO.COM  
You must be able to show evidence of purchase  
date to obtain warranty parts and service  
Model:  
Opus 21 s30  
Integrated Amplifier  
Warranty registration of your unit ensures that you  
will be contacted immediately if there should be a  
safety inspection, modification, or other product  
recall under applicable laws or regulations or  
otherwise. If you did not purchase directly from  
to register your player.  
Serial Number:  
Purchase Date:  
Purchased From:  
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DO NOT REMOVE COVER.  
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CAUTION  
NO USER-SERVICEABLE PARTS  
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INSIDE. REFER SERVICING TO  
RISK OF ELECTRICAL SHOCK  
QUALIFIED SERVICE PERSONNEL.  
DO NOT OPEN  
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Press to mute/un-mute the output. The volume level display will flash when muted.  
1
2
Press to select input 1, balanced (XLR).  
Press to select input 2, unbalanced (RCA).  
3
4
Press to select input 3, unbalanced (RCA).  
RS-232 Input - DB9 female  
For automated systems, connect to serial controller (listen-only).  
5
Opus PowerLink connection - 4 pin XLR male connector  
Connect only to Opus 21 Power Centre using supplied cable.  
6
Speaker Output Left - Binding Post (optional)  
Designed for cables with spade lugs. Observe polarity (+/-) markings on the top of the connector.  
7
Speaker Output Left - 4mm Banana  
Observe polarity (red +, blue -). Connect the center (yellow) jack to loudspeaker ground if available.  
8
Speaker Output Right - Binding Post (optional)  
Designed for cables with spade lugs. Observe polarity (+/-) markings on the top of the connector.  
9
Speaker Output Right - 4mm Banana  
Observe polarity (red +, blue -). Connect the center (yellow) jack to loudspeaker ground if available.  
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11  
12  
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Analog input 1 - XLR female connector, pin 2 non-inverting, pin 3 inverting  
Connect to balanced source. 20 Vrms maximum, 20 kOhm input impedance (10 kOhm per phase).  
Analog input 2 - RCA connector  
Connect to unbalanced source. 10 Vrms maximum, 10 kOhm input impedance.  
Analog input 3 - RCA connector  
Connect to unbalanced source. 10 Vrms maximum, 10 kOhm input impedance.  
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The s30 amplifier contains a serial control input which allows your entire Opus 21 family to be operated from an  
automated controller. The RS-232 port operates in listen-only mode and is opto-coupled to prevent ground  
loops. Programming commands and configuration details are available on our web site.  
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If the s30 is driven at high levels for excessive periods of time, the integral thermal protection may trigger, causing  
the amplifier to mute the outputs. The display will indicate the temperature of the internal heatsinks. Once the  
amplifier has cooled sufficiently, the display will return to normal and the amplifier can then be un-muted.  
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Dimensions  
24 x 25 x 7.5 cm / 9.5 x 9.8 x 3" W x D x H  
9.5 kgs / 21 lbs. shipping  
Weight  
Power Output  
30 Watts continuous into 8 Ohms  
+/- 0.1 dB from 20 Hz - 20 kHz  
+26 dB at volume level 99  
Frequency Response  
Maximum Gain  
Attenuation  
Inputs  
0.5 dB steps from -30 dB to full scale  
1.0 dB steps from -69 dB to -31dB  
Direct connection to Opus 21 sources / cd player  
(1 pair) Analog balanced via XLR  
(2 pair) Analog single-ended via RCA  
Resolution AV  
·
+1 (415) 643-6971 Ph  
·
+1 (415) 840-0098 Fax · www.resolutionaudio.com  
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