Classe Audio SSP-25 User manual

Classé Audio, Inc.
SSP-25
Preamplifier/Surround Sound Processor
SSP-25
Owner’s Manual

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Safety Information
1) To prevent fire or shock hazard, do not expose the SSP-25 to water or moisture.
2) Do not place the SSP-25 close to any heat-producing device such as a radiator, stove, etc..
3) Connect the SSP-25 only to an AC source of the proper voltage. The shipping container and the rear panel
serial number tag will stipulate the proper voltage. Use of any other voltage will almost certainly damage the
unit and will void the warranty.
4) Do not open the SSP-25 for any reason, as there are no user serviceable parts inside. An open unit,
particularly if it is still connected to an AC source, presents a potentially lethal shock hazard. Refer all
questions to authorized service personnel only.
5) If the SSP-25 will be out of use for an extend period of time (vacation, etc.), unplug the power cord from the
AC source to prevent any chance of problems from a voltage surge.
CE Notice
All of us at Classé take extreme care to insure that your purchase will become a prized investment. We are proud to
inform you all Classé Audio components have been officially approved for the European Community (CE) mark under
CE Certificate Number C401CLA1.MGS granted on 18 July, 1996.
This means that your Classé product was subjected to the most rigorous manufacturing and safety tests in the world.
The CE mark certifies that your purchase meets or exceeds all European Community requirements for unit-to-unit
consistency and consumer safety.
The SSP-25 is manufactured under license from Dolby Laboratories Licensing Corporation. It is additionally licensed
under one or more of the following patents: U.S. number 3,959,950, Canadian numbers 1,004,603 and 1,037,877.
Additionally, the SSP-25 is manufactured under license from Digital Theater Systems, Inc.
Dolby® Pro Logic®, and Dolby Digital® are registered trademarks of Dolby Laboratories Licensing Corporation.
DTS® is a registered trademark of Digital Theater Systems, Inc.

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Table of Contents
Introduction
Safety Information Page 2
CENotice Page2
ThankYou Page5
Classé Design Philosophy Page 5
About This Manual Page 6
Section 1: Diagrams Page 7
1.1 Front Panel Page 7
1.2 Rear Panel Page 10
1.3 Remote Control Page 13
Section 2: Installation Overview Page 17
2.1 System Hookup: Rear Panel Connections Page 17
2.1.1 To Power Amplifier(s) Page 17
2.1.2 Audio Source Components Page 17
2.1.3 Video Source Components Page 19
2.1.4 Remote Room Setup Page 20
2.2 System Configuration Page 21
2.2.1 The MENU System Page 21
2.2.2 Configuration Procedures Page 22
Section 3: Getting Started Page 24
3.1 Unpacking the SSP-25 Page 24
3.2 Optimal Placement Page 24
Section 4: System Hookup Page 25
4.1 Introduction Page 25
4.2 To Power Amplifier(s) Page 25
4.3 Source Components Page 27
4.3.1 Audio Considerations Page 27
4.3.2 Video Considerations Page 29
4.3.3 Patience Is A Virtue! Page 29
Section 5: Initial System Configuration Page 30
5.1 Introduction Page 30
5.1.1. What You’ll Need Page 30
5.1.2 The MENU Tree Page 30 and 31
5.2 Navigation: The First Steps Page 32
5.2.1 General Information Page 32
5.2.2 Activating the MENU System Page 32
5.3 MODE CONFIGURATION Page 34
5.3.1 Mode Overview Page 34
5.3.2 Input Type Page 34
5.3.3 Input Type setup Page 34
5.3.4 Compression Page 35
5.3.5 Back to normal operation Page 35
5.4 Audio Configuration (Speaker Setup) Page 36
5.4.1 Source Adjustments Overview Page 36
5.4.2 Source Setup Page 36
5.4.3 Mode Page 37

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5.4.4 Input page 37
5.4.5 Input Level Page 38
5.4.6 Analog Input Level page 39
5.4.7 Analog Input Level Setup page 40
5.5 Audio Configuration and Delay Page 42
5.5.1 Speaker Description, Size and number Page 42
5.5.1.1 Main Speakers Page 42
5.5.1.2 Center Speaker page 43
5.5.1.3 Surround Speakers Page 43
5.5.1.4 Subwoofer Page 43
5.5.2 Delay Setup Page 44
Delay Setup Worksheet Page 45
5.5.3 Balance Setup Page 46
5.5.4 Subwoofer Limit Page 47
5.6 Feature Setup Page 49
5.6.1 Noise Generator Page 49
5.6.2 Language Page 49
5.6.3 Factory Reset Page 50
5.6.4 Software Version Page 50
Section 6: Balance Trim Page 51
Section 7: Operating the SSP-25 Page 52
7.1 Introduction Page 52
7.2 The Information Display Page 52
7.2.1 Master Level Indicator
7.2.2 REF, OVER, and CLIP indicators
7.3 Mode Selection Page 53
7.3.1 Introduction
7.3.2 DTS
7.3.3 Stereo Surround
7.3.4 Stereo
7.3.5 Mono Front
7.3.6 Mono Center
7.3.7 Dolby Digital
7.3.8 Dolby Pro Logic
7.4 Changing Individual Channel Levels Page 54
7.4.1 Introduction
7.4.2 On-the-Fly Techniques
7.5 First Aid Page 55
Thank You From Everyone At Classé
Thank you for purchasing the Classé Audio SSP-25 Preamplifier/Surround Sound Processor.

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We take great pride in offering components that combine exceptional sonic performance and long-term reliability. To
do that, we have invested in extraordinary design and manufacturing facilities. We trust that you will enjoy your
purchase for many years to come.
Classé Design Philosophy
All of our components benefit from the same rigorous design philosophy. The goal is simple: All Classé products
must reproduce music with the harmonic and spatial integrity typical of fine instruments heard in a live, unamplified
performance.
Single Circuit Design
To this end, we make extensive use of carefully optimized versions of the same basic circuit precisely matched to
specific power requirements. This means that all Classé line level components and power amplifiers benefit from
years of refinement. However, our efforts do not stop here.
Listening: The Critical Design Element
Once we determine general circuit values for a particular application, we listen carefully while exchanging and mixing
different parts (transistors, capacitors, wiring, PC boards, etc.) and adjusting specific operating voltages within proper
engineering ranges.
Extended Real-World Lifespan
Every Classé component, even the most affordable, benefits from this painstaking approach. The result is an
optimum balance between the often-conflicting demands of exceptional performance and long-term reliability. Our
most expensive components gain from even tighter tolerance parts and highly segmented and exceptionally robust
power supplies with large reserve-current capabilities.
Our Pride in Manufacturing. Your Pride in Ownership.
We build all of our components to the highest possible standard. From glass-epoxy circuit boards to the massive 3/8”
thick faceplates, every Classé product is a tribute to both the art and science of sound reproduction. We hope that you
derive as much pleasure and satisfaction in using your Classé as we did in producing it.

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About This Manual
The Classé SSP-25 is a very sophisticated preamplifier/processor. Even so, although complete
understanding of the SSP-25’s many capabilities may take some study, its elegant design and
intuitive interface invites daily use by even the technically challenged.
We strongly urge you to read this Manual carefully before you connect and use the SSP-25 in
your home theater system. You’ll find answers to almost all of your questions in these pages.
That knowledge will greatly reduce your efforts as you configure your system to take best
advantage of the SSP-25’s enormous potential.
We’ve organized the Manual for both the experienced installer and the novice user.
The Installation Overview (Section 2) is written for those with technical experience. It provides
an inclusive picture of the SSP-25’s capabilities and suggests several effective system
configuration strategies.
The following Sections supply step-by-step instructions to help the less technical user configure
and use the SSP-25 effectively.
As in all such efforts, a little patience will go a long way to reducing the chances for frustration.
Remember, it took many talented people a long time to design the SSP-25 and you can’t be
expected to learn everything about it in one evening!
So relax. And enjoy. You’re about to enter a wonderful world of high-performance surround
sound.

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Section 1: Diagrams
Use the pictures in this section as your guide to the SSP-25. They show the locations of all controls, inputs, outputs,
remote keys -- in short, everything you need to know about your new preamplifier/surround sound processor. Read
the notes under each diagram carefully. You’ll find capsule explanations of all important features. Once you read
them, you’ll understand most of the SSP-25’s capabilities.
1.1 Front Panel
1) VIDEO < &>
These pushbuttons select an audio/video source by stepping from AV1 through AV4 (Video >) or from AV 4
back through AV1 (<Video).
These buttons “wrap” to the next input. For example, if you are enjoying the AV4 input, pressing “Video >“ will
step to AV1. Conversely, pressing “<Video“ while using AV1 will select AV4.
If you press either the “<Video“ or “Video >“ button while listening to an audio-only input, the SSP-25 will
deselect the audio-only input and select the previous or next AV input from the one last used.
(See *NOTEs below in “2) AUDIO<& >”)
2) AUDIO < &>
These pushbuttons work the same way as the Video <& >buttons described above. However, they select an
audio-only source. They “wrap” from AUD1 to AUD3 (<Audio) and from AUD3 to AUD1 (Audio >), though you
will notice that pressing the <or >button when the selected input is AUD3 or AUD1 deselects the AUDIO
ONLY inputs.
*NOTE: When selecting an audio only input the last used AV input LED remains lit, though the AV input is
inactive.
*NOTE: When you wish to return to listening to and watching an AV input after listening to an audio-only input
you may press a <VIDEO or VIDEO> button to move to the previous or next AV input. The currently active
AUDIO ONLY input LED will extinguish and the selected AV input will be active. You may also press the
<AUDIO or AUDIO> button once, twice or three times until the AUDIO ONLY LEDs are no longer lit. Each time
you press the <or >button the previous or next input is selected, unless AUD3 or AUD1 is selected. Pressing
the < button when AUD1 is selected or the >when AUD3 is selected, causes the AUDIO ONLY inputs to be
deselected and the currently lit AV input to become active again.

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SSP-25 Front Panel
3) AUDIO and VIDEO SOURCE LED INDICATORS
These red LEDs show the active input. The Input LED will glow red when that input is directed to the Main
outputs. The selected input is always directed to both the Main and the Record outputs. (See Sections 2.2
and 6.7 for further details.)
4) STANDBY (“On/Off”) BUTTON
Although this pushbutton seems to be a normal “On/Off” control, it is actually more sophisticated. When the
SSP-25 is plugged into a live AC outlet and the rear-panel power switch is in the “On” position, this push-
button activates all of the SSP-25’s audio and video circuitry and displays. The next push turns off all circuits
except for basic elements such as the central microprocessor and remote control sensors.
5) STANDBY (“On/Off”) LED INDICATOR
This LED glows green when the SSP-25 is in Standby or “Off” mode. It does not glow at all when the SSP-25
is fully activated.
*NOTE: When the button is pushed to activate the SSP-25 the standby LED goes out and the green MUTE
LED is briefly lit. The information display also lights with a “Classé SSP-25” readout. As soon as the circuitry
becomes active the MUTE LED goes out, the red LED(s) in AUDIO and/or VIDEO light, and the display
changes to briefly identify the active input. The display changes immediately to continuously identify the type of
signal (analog, digital) in the top line and the decoding method in the lower line.
6) INFORMATION DISPLAY
The two lines of information displayed, and the lit LEDs on the SSP-25 combine to provide a comprehensive
view of its current operating parameters. All set-up procedures are also performed utilizing the panel display.
The first line functions as a headline, displaying selected input, type of input signal, or lack of signal, while the
second line displays mode, output level, balance, and so forth.
On the left side of the display window are printed CLIP,OVER,REF,and THX. Clip, Over and Ref are used as
indicators when setting the proper input levels of the left channel of the analog audio inputs. Their use is
explained in section 5.4.6. THX lights as a notifier when THX playback is selected as a decode mode.
On the right side of the display window are printed CLIP,OVER,REF,and COMP. Clip, Over and Ref are
used as indicators when setting the proper input levels of the right channel of the analog audio inputs. Their
use is explained in section 5.4.6. COMP lights when Compression, better known as “night mode” is selected,
as explained on page 15.

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SSP-25 Front Panel
7) MODE BUTTONS < & >
These buttons step back and forth through the SSP-25’s operating modes in the following sequence:
DTS® Cinema, DTS® Music, Analog Bypass, Mono (Center), Stereo, Stereo Surround, Dolby Pro Logic®,
Dolby Digital® (AC3). Utilizing the two buttons you can quickly arrive at the mode you desire.
8) MUTE BUTTON
This button fully mutes the SSP-25’s main outputs. A second push restores the previously selected operating
levels. Record output is unaffected. The Mute button provides a convenient way to lower the volume when
answering the telephone.
*NOTE: Turning the volume up with the volume knob will remove muting, but turning down the volume while in
mute mode will not remove muting, but when muting is removed the new lower volume level will be present.
Muting can be removed either with the mute button or by turning up the volume slightly.
9) MUTE LED INDICATOR
This LED glows green when the SSP-25 is in the mute mode.
10) MASTER LEVEL CONTROL
This large knob changes the relative levels of all active main room channels simultaneously. Each
loudspeaker’s relative loudness stays in perfect balance with all other speakers as programmed during setup.
The Main Information Display shows the master level setting in numbers from “Volume: -80” (virtually no
output) to “Volume! +35” (maximum output).

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1.2 Rear Panel
1) ANALOG AUDIO INPUTS (See *NOTE 1 below: Page 13)
a) AUD1 (Line level, balanced: XLR x 2 OR line level, single ended: RCA x 2) (PIN 2 = HOT)
b) AUD2 (Line level, single ended: RCA x 2)
c) AUD3 (Line level, single ended: RCA x 2)
e) AV1 (Line level, single ended: RCA x 2)
f) AV2 (Line level, single ended: RCA x 2)
g) AV3 (Line level, single ended: RCA x 2)
h) AV4 (Line level, single ended: RCA x 2)
These analog audio inputs accept a line level signal from any component equipped with the appropriate output
circuitry. With the partial exception of “a) AUD1,” the balanced input requires three-pin XLR connectors (Pin
2 = Hot), all analog audio inputs are single ended circuits with RCA-style terminations. The SSP-25 has no
internal provisions for MM or MC phono amplification/RIAA equalization but accepts line level outputs from a
wide variety of external step-up devices if desired.
2) DIGITAL AUDIO INPUTS (See *NOTE 1 below: Page 13)
a) AUD1 (multi-format S/PDIF: RCA x 1)
b) AUD2 (multi-format S/PDIF: RCA x 1)
c) AUD3 (multi-format S/PDIF: RCA x 1)
d) AV1 (multi-format S/PDIF: RCA x 1)
e) AV2 (multi-format S/PDIF: RCA x 1)
f) AV3 (Multi-format S/PDIF: RCA x 1)
g) AV4 (multi-format S/PDIF: Toslink x 1 OR Multi-format S/PDIF RCA x 1)
h) AV4 AC3 (Multi-format S/PDIF: RCA x 1) USED TO PLAY AC3 ENCODED LASER DISKS ONLY
Except partially for “g) AV4,” these digital audio inputs accept standard S/PDIF digital signals via 75 ohm
coaxial cables with RCA-style connectors. The AV4 input also uses a Toslink-style optical connector for digital
source components with this type of digital output. AV4 is designed to be used with the optical digital output of
many laser disc players and/or DVD players.
3) VIDEO INPUTS
a) AV1 (Composite: RCA x 1)
b) AV2 (Composite: RCA x 1)
c) AV3 (Composite: RCA x 1)
d) AV4 (Composite: RCA x 1)
e) AV1 (S-Video: mini-DIN x 1)
f) AV2 (S-Video: mini-DIN x 1)
g) AV3 (S-Video: mini-DIN x 1)
h) AV4 (S-Video: mini-DIN x 1)
These inputs accept video signals from various video source components. Inputs a) through d) accept a composite
video signal while inputs e) through h) accept S-Video (Y/C) signals.

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SSP-25 Rear Panel
4) VIDEO OUTPUTS
a) Main (Composite: RCA x 1)
b) Record (Composite: RCA x 1)
c) Main (S-Video: mini-DIN x 1)
d) Record (S-Video: mini-DIN x 1)
These video outputs direct video signals from various source components to selected destinations.
The Main (Composite)video outputs transfer a chosen source’s video signal and on-screen display
information to any monitor or TV set with a composite input. The Main (S-Video) output duplicates this
function for all components using the S-Video (Y/C) signal path.
The Record (Composite) video output directs the chosen source’s video signal to a video recording device.
No on-screen information appears at this output. The Record (S-Video) output duplicates this function for all
components using the S-Video (Y/C) signal path.
5) MAIN AUDIO OUTPUTS (Preamplifier outputs)
a) Multi-channel (L, C, R, LS, RS, & Sub line level, unbalanced: DB25 x 1)
b) Front (L & R line level, balanced: XLR x 2)
c) Multi-channel (L, C, R, LS, RS, & Sub line level, unbalanced: RCA x 6)
These outputs allow you to easily connect the SSP-25 to any power amplifier designed for consumer use.
The multi-channel DB25 output provides a convenient single-cable connection to multi-channel power
amplifiers and also insures channel-to-channel continuity between preamp/processor and power amplifier.
The front Left and Right XLR outputs provide balanced (Pin 2 = Hot) connections from the SSP-25 to power
amplifiers with balanced inputs. They are ideal for mixed use (music and movies) systems where the finest
audio reproduction is a prime goal.
The individual RCA outputs provide a convenient signal path to almost all power amplifiers.
You may use any of these connections in any combination that does not duplicate channel assignments. For
example, you may use the Front Left and Right channel balanced XLR outputs to connect the SSP-25 to the
power amplifier(s) for those speakers and either the RCA connectors or the DB25 connector for all other
channels. Similarly, you can use the DB25 output for five channels and the RCA Sub output for the subwoofer
if needed.
6) SECONDARY AUDIO OUTPUT
a) Record (L & R line level, unbalanced: RCA x 2)
The Record outputs allow easy connection to a VCR or any other recording device or the line level analog
output may be sent to a remote location. (Utilization of a patch bay or switch box would allow multiple use
distribution. The same source selected for the main output appears at the record output).

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SSP-25 Rear Panel
7) IR (Infrared) REMOTE CONNECTORS
a) Main In (Xantech compatible: 3.5" mini-jack x 1)
b) Main Out (Xantech compatible: 3.5" mini-jack x 1)
The Main In jack allows connection of an external IR sensor that functionally replaces the SSP-25’s front
panel IR sensor. It is particularly useful in installations where the SSP-25 is placed in a closet or behind the
doors of an equipment cabinet where the front panel IR sensor would be blocked from receiving signals from
the hand held remote controller.
The Main Out jack transfers IR commands received from either the SSP-25’s front panel IR sensor or an
external sensor connected to the IR Main In jack to a remote IR repeater. This jack allows a wide variety of
source components to receive commands via their own built-in IR sensors.
8) MISCELLANEOUS
a) AC power switch
b) AC power cord receptacle
The AC power switch positively disconnects the SSP-25 from all AC power when it is in the OFF position,
even if the AC cord is connected to a live AC outlet. In the ON position, the SSP-25’s basic circuits (central
microprocessor and remote sensors) are always active (“Standby” mode) providing, of course, that the AC
cord is plugged into a live current source.
The AC power cord receptacle is the standard IEC-type used for test equipment, computers, and high quality
audio/video components. It accepts a wide variety of detachable AC power cords.
*NOTE 1: The SSP-25 is able to recognize the character of input signals. It is able to differentiate between DTS
and AC3, as well as the difference between digital and analog. This means that though there only three
audio-only inputs you can have as many as six sources plugged in, if three are digital and three are analog.
(AUD1 must utilize an XLR connector). Please also note AV4 has three digital audio inputs and all three may
be used. AV4 AC3 for an output from a laser player playing Dolby Digital encoded disks. The second digital RCA input
can be used for input from the same Laser player when playing DTS or Dolby Pro Logic encoded disks. The
Toslink input could be used for connecting a DVD player, and the processor will recognize and play correctly the digital
input from DTS, or Dolby Digital (AC3) DVDs or any CD. (See further notes in set up sections).

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1.3 Remote Control
1) DISPLAY
This button changes the intensity of the front panel information
display by turning off the readout. The display panel itself
remains lit.
2) STANDBY
This button duplicates the function of the STANDBY button
described in FRONT PANEL (#4) above. While in standby
mode the SSP-25 will only respond to the standby button.
3) THX
The THX button turns on or off THX effects. Playback of
laser disks or DVDs that have been formatted for THX
playback will benefit from this added processing.
4) MODE BUTTONS < & >
These buttons are functionally identical to those on the front
panel. They step back and forth through the SSP-25’s
operating modes in the following sequence: DTS® Cinema,
DTS® Music, Analog Bypass, Mono (Center), Stereo, Stereo
Surround, Dolby Pro Logic®, Dolby Digital® (AC3). Utilizing
the two buttons you can quickly arrive at the mode you
desire. SEE APPENDIX FOR AN EXPLANATION OF THE
VARIOUS MODES.
5) AUTO
The “AUTO” button is used to cause the SSP-25 to test the
character of the input signal on the current input. If the
current input has been set to “Manual” and the input signal
changes the SSP-25 will be unable to recognize the new
signal. Pressing “AUTO” will correct the problem.
6) TRIM
Pressing this button brings up a display which reads:
“Balance trim Left +0.0 dB.” By next pressing the keys
marked “/\” or “\/” above and below the “ENTER” button you
can either increase or decrease in 0.5 dB steps the volume
of the Left front channel. You can navigate through the other
individual channels by pressing the “<” or “>” buttons to the
left or right of the “ENTER” button. The sequence is “Left
Front, “Center”, “Right Front”, “Left Surround”, “Right
Surround”, and “Subwoofer.” Only the selected channel is
affected. Each press of the “/\” or “\/” button changes the
volume up or down by 0.5 dB, and as well, each press of the
“>” or “<” button moves from channel to channel. Pressing
“Trim” again brings back the display previously selected.
Changing the volume, using either the front panel mounted
gain control or the “Volume” buttons on the remote,
maintains the same balance selected with the “Trim” feature.

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Changing the Trim affects all modes and all inputs identically.
You may increase or decrease the level of any given channel
by 8 dB. Since the intent of “Trim” is to modify the output for
an individual movie or piece of music, the effect is not
permanent. When the “Standby” mode is selected, or the
ON/OF Switch on the rear panel is used to turn the unit fully
off, “Trim” memory is erased. Permanent changes to the
individual channel levels can made in “Setup” in as
discussed in Section 5.
7) MENU
This button selects the Setup menu. It calls up the first Main
(Configuration) MENU display, even if a lower level menu is
currently displayed EXCEPT when the Main MENU is already
displayed. In this case, pressing MENU will exit the menu
system entirely. For a full explanation of its operation and
importance see Section 5. Day to day use of the SSP-25
should not require use of the “MENU” button.
8) MODE
functionally identical to the front panel Mode control (Front
Panel, #8, above) steps through the SSP-25’s operating
modes in the following sequence: DTS, Stereo Surround,
Stereo, Mono Front, Mono Center, Dolby Digital®, and Dolby
Pro Logic®.
9) UP “/\” (Up Arrow)
Increases settings selected in the setup sequence. Also used
to increase channel level in the “Trim” mode.
10) LEFT “<”(Left Arrow)
Selects the previous (Configuration) MENU items. Also used
to move back through the channels in “Trim” mode
11) ENTER
The “ENTER” button, and the associated directional buttons
arrayed around it, are used to navigate through the setup
sequences which become available when the “MENU” button
is pressed. See Section 5 for full explanation of their use.
12) RIGHT “>”(Right Arrow)
This button selects a subsequent (Configuration) MENU item.
Also used to move forward through the channels in “Trim”
mode.
13) DOWN “\/”(Down Arrow)
Decreases settings selected in the setup sequence. Also
used to decrease channel level in the “Trim” mode.

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14) AV1
Pressing this button directly selects the Audio-Video 1 input
for use. “AV1” will be briefly displayed in the panel window,
then the type of audio signal and decoding mode will display.
15) AV2
Pressing this button directly selects the Audio-Video 2 input
for use. “AV2” will be briefly displayed in the panel window,
then the type of audio signal and decoding mode will display.
16) AV3
Pressing this button directly selects the Audio-Video 3 input
for use. “AV3” will be briefly displayed in the panel window,
then the type of audio signal and decoding mode will display.
17) AV4
Pressing this button directly selects the Audio-Video 4 input
for use. “AV4” will be briefly displayed in the panel window,
then the type of audio signal and decoding mode will display.
18) AUD1
Pressing this button directly selects the Audio-only 1 input
for use. “AUD1” will be briefly displayed in the panel window,
then the type of audio signal and decoding mode will display.
The previously selected AV input will remain lit.
19) AUD2
Pressing this button directly selects the Audio-only 2 input
for use. “AUD2” will be briefly displayed in the panel window,
then the type of audio signal and decoding mode will display.
The previously selected AV input will remain lit
20) AUD3
Pressing this button directly selects the Audio-only 3 input
for use. “AUD3” will be briefly displayed in the panel window,
then the type of audio signal and decoding mode will display.
The previously selected AV input will remain lit.
21) COMPR
Dolby Digital specifications allow a special “Night Mode”
format which reduces the loudness of special audio effects.
Pressing the “COMPR” button turns on two levels of
compression: “Medium” and “Full”.

22) MUTE
The operation of this button is functionally identical to the
same labeled button on the face of the SSP-25. This button
mutes the SSP-25’s main outputs. A second push restores
the previously selected operating levels. Record output is
unaffected. The Mute button provides a convenient way to
lower the volume when answering the telephone.
*NOTE: Turning the volume up with the volume knob will
remove muting, but turning down the volume while in mute
mode will not remove muting, but when muting is removed
the new lower volume level will be present. Muting can be
removed either with the mute button or by turning up the
volume slightly
23) “\/’VOLUME (down)
Affects Master Level settings in a manner identical to turning
the front panel Master Level Control counterclockwise.
Pressing the button and releasing it causes the volume to
decrease in a 1 dB step. Holding the button down will, after a
brief pause after a 1 dB decrease, cause the volume to
continuously decrease in 1 dB steps until the button is
released. –80 dB is the minimum level.
24) “/\” VOLUME (up)
Affects Master Level settings in a manner identical to turning
the front panel Master Level Control clockwise. Pressing the
button and releasing it causes the volume to increase in a 1
dB step. Holding the button down will, after a brief pause
after a 1 dB increase, cause the volume to continuously
increase in 1 dB steps until the button is released. +35 dB is
the maximum level.

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Section 2: Installation Overview
This Section discusses the broad concepts of installation, setup, and menu usage. It is
an outline for the experienced installer, not a step-by-step guide to all the configuration
choices available. You’ll find examples that suggest possible approaches incorporating
the SSP-25’s remarkable flexibility. The following Sections contain specific instructions
for each topic outlined here.
SSP-25 rear Panel
2.1 System Hookup: Rear Panel Connections
2.1.1 Connections to system power amplifier(s)
For Left Front and Right Front channels, choose XLR (balanced), RCA (single ended), or DB25 multipin
connections.
For Center, L-Surround, and R-Surround channels, choose either RCA or DB25 connection.
For Subwoofer, use either RCA or DB25 connections. The SSP-25 contains a digital-domain bass
crossover. For that reason, we recommend that you consider bypassing any other crossover in the signal
path.
2.1.2 Audio Source Component Connections
The SSP-25 could conceivably handle up to 16 audio sources because it is capable of automatically
distinguishing between analog and digital signals and prioritizing them. It will also automatically recognize and
properly decode the different digital formats available.
There are 3 dedicated Audio-only inputs (which only means there is no video input associated with them), and
4 dedicated audio-video inputs (which, naturally, means there is a video input dedicated to each one). AV4 has
a potential of 3 digital audio inputs (1 of which is dedicated to demodulated AC3). Each Audio-only input has a
digital and an analog input, as does each Audio-Video input.
Thus, the SSP-25 can accommodate up to 9 digital sources and up to 7 analog sources. Of course it is
extremely unlikely that anywhere near that many sources would be connected to the SSP-25. However; as you
can imagine, there is very little likely-hood that there is not a way to configure even an extremely complex
Audio/Video installation, as long there are no more than 4 Video sources.

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SSP-25 rear Panel
2.1.2.1 Corresponding connections
We have chosen to simplify system connections by associating each of 4 audio inputs with a dedicated
Video source. Unlike our high-end SSP-50, which has considerable configuration flexibility, we have
delivered with the SSP-25 a product which is powerful and flexible, yet simple. For example, if you’ve
connected a DVD player’s video output to the AV1 video input, you must connect the player’s audio output
to the AV1 audio input. We recommend that you use the 3 audio-only inputs for audio only sources and
use the 4 audio/video inputs for audio/video sources. This will simplify your installation process. Note that
there is no performance difference between the audio-only and audio/video inputs.
(Please note: because the SSP-25 can select a digital or analog signal from the same input; if you are in
a squeeze for inputs you may connect both, using the separate analog and digital connectors. If you
attach two sources in this fashion you must provide some way of having only one or the other source
playing, as the SSP-25 will always pick the digital source over the analog if both are playing. This is also
useful in a situation where you might be using a computer mounted DVD/CD player, which outputs digital
data from a DVD but outputs analog when playing a CD).
2.1.2.2 Digital or Analog?
If a source has both digital and analog audio outputs, use a digital connection. Since the SSP-25
incorporates high performance 24 bit DACs this will result in the best performance. Remember to use
proper cables for digital audio connections. Utilizing a digital cable will also minimize the noise that might
be induced on an analog signal.
2.1.2.3 Laser Disc Digital Audio: PCM or Dolby Digital RF?
Most Laser disc players have separate PCM (Pulse Code Modulation) two-channel digital and multi-
channel Dolby Digital (AC-3) RF outputs. These players will need 2 of the SSP-25’s digital inputs, one
receiving a direct feed from the source’s PCM outputs and the second sending data to an (optional)
onboard RF (Radio Frequency) demodulator. You should send both of these signals to AV4. You can use
the Toslink input for the PCM or DTS input and the RCA (S/PDIF) input for the AC3 (Dolby Digital) input
which needs to be demodulated before it can be processed. Setting the input source configuration to
“Auto” utilizes the SSP-25’s ability to prioritize signal inputs and allows it to recognize DTS, AC3, Dolby
Pro Logic, and CD stereo, depending on which is being played. See Sections 6.6 and 6.7 for details.
2.1.2.4 DTS capability
The SSP-25 includes advanced DTS digital decoding capability for those software/hardware combinations
capable of delivering this high resolution audio format. Automatic switching to DTS has been
programmed into the processor. The processor gives the higher priority to digital signals, and the
highest priority to DTS. (DTS Cinema over DTS Music).

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SSP-25 rear Panel
2.1.2.5 Analog-only sources:
For analog sources with balanced (XLR) connections (high quality D/A converters, like the Classé DAC-1),
use AUD1. For RCA connections, use AUD2, and/or AUD3 – (AUD1 can be used for unbalanced inputs
(RCA) if a connector which changes XLR to RCA is used and pin 3 is shorted to pin 1 on the XLR).
There is one analog audio record output. In most systems the audio output, and its associated video
output, would be sent to a VCR. (The SSP-25 has no digital outputs.)
2.1.3 Video Source Component Connections
2.1.3.1 Video Input Selections:
Connect video sources to the SSP-25 video inputs. Consider the nature of a source’s audio output when
deciding which AV input to use. For example:
If a video source (a laser disc player, for example) has a Toslink (optical) digital audio output, you might
choose the SSP-25’s AV4 video input since one of AV4’s digital audio input is Toslink.
If the video source (a DVD player, satellite receiver, etc.) has a coaxial (RCA) digital audio output, connect
the source’s video output to the SSP’s AV1, AV2, AV3, or AV4 inputs since these inputs have coax digital
audio inputs.
If the video source (a VCR, for example) has only analog outputs, connect the video to AV1, AV2, AV3, or
AV4 since these also have AV analog inputs. As above, refer to Section 5.8 for details.
2.1.3.2 Video Outputs
Connect the Main Video outputs to the primary monitor/projector.
Connect the SSP-25’s Record output to a VCR record input. You may also utilize the record output to
send the audio and video signal to a remote area for viewing or for listening. There is both an S-Video
output and a composite video output. The audio output is at “line level”, and will require a preamplifier at
the remote location if it is used for this purpose. (Record out is the same signal as main out).
2.1.3.1 Composite vs. S-Video:
Video sources connected to any composite input can be directed to composite outputs only. Likewise, an
S-Video source is available only at S-Video outputs. Thus, the simplest approach to system design would
use composite connections only. If this “composite only” strategy is appropriate, skip the rest of this
Section. If you will use S-Video connections, continue reading . . .
If the system monitor/projector accepts only composite video, use the SSP-25’s composite inputs and
outputs only. Ignore all S-Video connections.

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SSP-25 rear Panel
If the system monitor/projector accepts both composite and S-Video connections, we recommend S-Video
for best performance. The SSP-25 allows up to 4 S-Video sources.
If the system monitor/projector accepts composite and S-Video, there are 2 approaches to choose from:
1) Use composite inputs and outputs only for all sources and don't use the S-Video connectors.
2) Use S-Video connections for high resolution sources and composite connections for lower quality
sources. Connect the SSP-25’s composite and S-Video main outputs to the monitor/projector.
Refer to the display device’s manual to make the appropriate selection when viewing a particular
source. Be aware that when you choose a different video source, you may need to switch inputs
(composite or S-Video) on the monitor/projector.
For remote video distribution (sending a video signal to a second room, utilizing the record output), you
may choose either of these approaches:
1) For simpler systems, use composite video inputs and outputs for all connections. Do not use any
S-video inputs or outputs.
2) For more sophisticated systems, use S-Video in the main room and composite connections for
the remote area.
Accomplish this by connecting a source to the SSP-25 with both composite and S-Video cables.
However, remember that the SSP-25 does not allow simultaneous connection of both composite
and S-Video to the same input. Simply use two SSP-25 inputs, one for composite and one for S-
Video.
For example, to view a laser disc in the main room via S-Video and the same disc in the remote
location, connect the laser disc player’s S-Video output to the SSP-25’s AV1 S-Video input and
the player’s composite output to the AV1 composite input. View the S-Video source in the main
room by selecting AV1. View the same source from “Record out” in a remote room or record it via
the composite connection.
.
We strongly recommend that you write down the connections
chosen for each source for later reference.
2.1.4 Remote room setup
Connect an IR receiver/transmitter to the SSP-25’s rear panel remote IR connector. This allows the SSP-25
to respond to commands from a different room.
2.2 System Configuration