Specifications

When the MODE button is depressed the STEREO inputs from

both the left and right channel are combined or blended to

MONO operation. This gives a reduction in “separation” from

approximately 100dB down to approximately 8dB between

STEREO channels and is desirable for reducing apparent separa-

tion between stereo speakers, or for establishing the the proper

spacial effect for more natural reproduction using stereo head-

phones. This is the normal position for reproduction of MONO

analog LP recordings with a STEREO phono cartridge.

The MODE (Stereo/Mono) button is not designed to provide two

channel reproduction from a single output mono device, such as a

mono tuner or mono tape recorder unless a suitable Y connector

is inserted in the signal path from the mono device to the two

stereo inputs.

NOTE: To further explore the reasoning for 8dB separation in mono mode, most

stereo recordings contain a certain degree of “summing” and “differencing” between

channels, plus signals which are pan potted or have modified phase relationships to

each other. This spacial information may occur naturally in the recording process by

acoustic leakage between mic. channels, or be purposely added/enhanced by the

recording engineer during the record or mixdown stage. This is done in order to pro-

vide the desired spacial effect.

If these signals are summed to mono with no separation of channel information, the

in-phase portion of the combined signal is boosted, the out of phase portion is atten-

uated, and some of the signal remains at the same level. This has the undesired

effect of altering the timbre of the recording. Thus the true mono summation has the

negative effect of destroying the recording’s tonal balance, front to back depth per-

spective, etc.

Note that “true” Mono recordings do not contain these phase can-

cellations etc., and thus maintain their tonal balance in ALL modes.

MODE FUNCTION