Resolution OPUS 21 S80 User manual

Opus 21
s80 Integrated Amplifier
Owner's Manual
resolution

From all of us at Resolution Audio, thank you for choosing the Opus 21 s80 amplifier. We went to great lengths
to design and produce an integrated amplifier that offers musical pleasure and superior performance.
Unpacking
After unpacking your Opus 21 s80 amplifier, inspect it for any shipping damage and contact us immediately
if any is found. Do not plug it into the power supply if you find any shipping damage.
Please keep all packing materials for future transport of your amplifier. Shipping the Opus 21 in anything
other than its original crate may result in damage that is not covered by warranty. If you require
a replacement crate or packing materials, please contact Resolution Audio.
Should you need to repack the unit, be certain to place the amplifier between the supplied foam sheets,
with the accessory box on top.
The accessory box contains the following items:
Opus PowerLink cable
(2) Toroidal power transformers for installation in your Opus 21 Power Centre
Hardware to install the transformers
Replacement fuse
An integrated circuit to update the software in your Opus 21 Power Centre, if necessary
Installation
The s80 amplfier must be used in conjunction with your Opus 21 cd player and Power Centre.
If the toroidal power transformers have not yet been installed in your Power Centre, contact your dealer or
Resolution Audio directly for assistance. The new fuse should also be installed in the power entry module
located on the rear of the Power Centre.
The s80 amplifier must be located directly beneath your Opus 21 source components.
First, remove the dust cover from the connector located on the bottom of your Opus 21 cd player. Next, position
the cd player directly on top of the s80, ensuring the connectors are aligned. Press the connectors firmly
together to secure the connection.
Locate the Opus 21 cd+s80 and Power Centre on your shelf.
Be sure to leave space around the s80. It should be placed on a firm surface to allow adequate ventilation.
We recommend that the Power Centre be placed on a separate shelf for optimum performance.

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 s80 and Power Centre.
Note that the cable can only be installed in one direction.
Connect your speaker cables to the s80 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 s80 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 s80 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. The output modulator is also disabled 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.

Safety Precautions
CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK,
DO NOT REMOVE COVER.
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
CAUTION
RISK OF ELECTRICAL SHOCK
DO NOT OPEN
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.
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.
Check that the operating voltage of your unit
is identical to that of your local power supply.
Replace fuses only with identically rated
fuses.
To reduce risk of electrical shock, keep the
unit dry and grounded. Do not operate the
unit near water.
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 Audio.
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.
Do not discard the original box and packing materials.
When shipping the unit to another location or for repair
work, repack in original material.
Do not attempt to service this product. All servicing
should be referred to qualified service personnel.
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.

Warranty
Resolution Audio 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 Audio 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 Audio 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 Audio.
Warranty Registration
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 s80
Integrated Amplifier
Serial Number:
Purchase Date:
Purchased From:
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
Resolution Audio, please visit
www.resolutionaudio.com to register.

Front Panel and Controls
Rear Panel and
Connections
1 2 3 4
7
8
9
10
6
5
resolution audio
san francisco, california usa
connect only
to opus 21 ps
leftright
speaker output speaker output
rs-232 in CAUTION
RISK OF ELECTRICAL SHOCK
DO NOT OPEN
opus 21 s80
stereo amplifier
DO NOT REMOVE COVER.
NO USER-SERVICEABLE PARTS
INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
inputs
serial number:
2140000
11
12
13

1Press to mute/un-mute the output. The volume level display will flash when muted.
2
3
5RS-232 Input - DB9 female
For automated systems, connect to serial controller (listen-only).
6Opus PowerLink connection - 6 pin XLR male connector
Connect only to Opus 21 Power Centre using supplied cable.
7Speaker Output Left - Binding Post (optional)
Designed for cables with spade lugs. Observe polarity (+/-) markings on the top of the connector.
8Speaker Output Left - 4mm Banana
Observe polarity (red +, blue -). Connect the center (yellow) jack to loudspeaker ground if available.
9Speaker Output Right - Binding Post (optional)
Designed for cables with spade lugs. Observe polarity (+/-) markings on the top of the connector.
10 Speaker Output Right - 4mm Banana
Observe polarity (red +, blue -). Connect the center (yellow) jack to loudspeaker ground if available.
11 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).
12 Analog input 2 - RCA connector
Connect to unbalanced source. 10 Vrms maximum, 10 kOhm input impedance.
13 Analog input 3 - RCA connector
Connect to unbalanced source. 10 Vrms maximum, 10 kOhm input impedance.
4
Press to select input 1, balanced (XLR).
Press to select input 2, unbalanced (RCA).
Press to select input 3, unbalanced (RCA).

RS-232 Serial Control
The s80 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.
Thermal Protection
Due to the high-efficiency design of the s80, overheating is unlikely. Should the thermal protection be
triggered, the amplifier will mute the outputs. The display will indicate the internal temperature. Once the
amplifier has cooled sufficiently, the display will return to normal and the amplifier can then be un-muted.
Specifications
Dimensions 24 x 25 x 7.5 cm / 9.5 x 9.8 x 3" W x D x H
Weight 9.5 kgs / 21 lbs. shipping
Power Output 80 Watts continuous into 8 Ohms
Frequency Response +/- 0.1 dB from 20 Hz - 20 kHz
Maximum Gain +29.5 dB at volume level 99
Attenuation 0.5 dB steps from -30 dB to full scale
1.0 dB steps from -69 dB to -31dB
Inputs Direct connection to Opus 21 sources / cd player
(1 pair) Analog balanced via XLR
(2 pair) Analog single-ended via RCA
Resolution Audio · [phone] Ph · [phone] Fax · www.resolutionaudio.com