Classe Audio SSP-25 Owner's Manual page 18

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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