Owner`s manual

output levels of the decoder out of adjustment, changing the volume of

the Left and Right speakers while leaving the Center and Surround

speakers unaffected.

One could attempt to restore the proper balance by marking a “cali-

brated” point on the preamplifier’s volume control and then using only

the Pro-Logic decoder to adjust the volume of the system, but this

method is both crude and imprecise, yielding inconsistent performance

at best.

the SSP must not

be in a tape loop

The last remaining alternative would seem to be to insert the decoder

“within” a preamplifier by hooking it up in a tape loop. Unfortunately,

this setup returns the Left and Right outputs of the decoder to the

preamplifier, where they can be inappropriately changed without

changing the Center and Surround outputs. It is therefore inappropri-

ate to place surround sound decoders in a tape loop.

It would seem that there is no way to properly integrate a surround

sound processor with a preamplifier for a high quality, dual-purpose

system.

the SSP & the Nº32 The Nº32 solves this dilemma by virtue of a specially-designed sur-

round sound processor interface. When you select the SSP name for a

particular input on the Nº32, the output level and balance controls are

defeated and the preamplifier operates in a “unity gain” mode, passing

through whatever signal enters that input without changing its volume

in any way. In fact, the display indicates that a line-level signal is being

“passed through” unchanged by showing “LINE” in the display where

the volume would normally be displayed.

Thanks to this design innovation, it is possible for the first time to cor-

rectly integrate a surround sound processor with a preamplifier, send-

ing the processor’s Left and Right outputs through the Nº32 (and on to

the power amplifier for the main front speakers). Since the output level

of these channels cannot be changed by the Nº32 while in SSP mode,

the preamplifier cannot corrupt the careful calibration of the

processor’s output levels. And since the audio portion of audio/video

sources are fed directly to the processor’s audio input(s) at a line level,

input calibration cannot be disturbed by the preamplifier.

noise in a/v systems In some cases, connecting your audio and video systems together can

result in noise, typically a 50/60 Hz or 100/120 Hz hum. The most

common cause for this noise is a “ground loop” caused by the presence

of two ground references in the system: one from the power company

and another from the cable-television company.