User manual

Turning the volume knob (which serves as a balance control in bal-

ance

mode) in either direction will change the balance in that direc-

tion. The display will reflect this by changing to the appropriate single-

headed arrow to indicate the direction of change and by showing the

number of decibels by which that channel has been increased (in tenths

of a decibel) relative to the other. (In point of fact, it is the opposite

channel’s volume that is reduced, a much safer and more sensible thing to

do that increasing the volume of the channel toward which you wish to

shift the image.)

If balance is left in a non-centered position, the display will revert to

its normal operation after a few seconds, but the balance indicator

LED

will remain lit as a reminder that the balance is not centered. Re-

storing the balance to its centered, 0.0 setting and leaving the balance

mode of operation will extinguish the balance LED indicator.

balance control tip Precise balance control is essential for obtaining accurate sound-

staging. Output imbalances due to differences in speaker sensitivity and

asymmetrical placement of the loudspeakers in the room are common,

and degrade imaging accuracy.

To correct this problem, play a mono recording (or use a “Y-adapter” to

send the same signal to both the left and right connectors of the active

input). Center the resulting image (which should be quite small) di-

rectly between the loudspeakers, using the balance control. Differ-

ences as small as 0.1 or 0.2 decibels have been found to be significant.

Try it.

Note that this “mono trick” can correct only for differences that occur

after the preamplifier in the signal chain, things like asymmetrical

placement of loudspeakers or slight mismatches in sensitivity between

speakers. If a particular recording is out of balance, you will have to ad-

just the balance more subjectively, in stereo, as you normally have done.

polarity The Nº383 allows you to invert the polarity of the music to which you

are listening with the press of a button. People vary in their sensitivity

to this aspect of the sound, and the difference frequently ranges from

subtle to inaudible, depending on microphone technique and other

factors in the recording itself. However, some recordings simply sound

correct in one position, and irretrievably wrong in the other.

We encourage you to experiment with the polariy feature to see what

you think works best for any given recording, understanding that the

recordings themselves are anything but consistent.