Operation
A
fter following the procedures outlined in the Installation/Rear Panel
Power Connections and Signal Connections sections, the Amplifiers can be
turned on by pressing the FRONT PANEL STANDBY/POWER buttons. Allow
approximately twenty (20) minutes for each Amplifier to reach operating
temperature and maximum performance potential. A short warm-up time is
dependent upon each Amplifier being plugged in to an active AC mains
power source for at least two hours prior to activating the FRONT PANEL
STANDBY/POWER buttons. Therefore, it is recommended that each
Amplifier be continuously connected to an active AC mains power source.
If you desire to disconnect the AC mains for an extended period of time,
simply disconnect the AC power cable from the wall outlet and reconnect
upon your return. Slight transients may be heard in the loudspeakers during
the AC mains connect/disconnect transitions.
Your new Model 6 Amplifiers will require an initial break-in period of at
least eighty (80) hours before maximum performance can be expected.
Efficient break-in procedures require the Amplifiers to be fully operational
(playing music). Continuous and noticeable performance improvements will
occur during subsequent months of operation.
To achieve the maximum performance for which these Amplifiers were
designed, it is recommended that balanced signal source (INPUT) and LOW
INPUT IMPEDANCE options are used. This condition requires that the
driving source component (preamplifier) is equipped with balanced
outputs and sufficient output current to properly drive the inputs of the
Model 6 Amplifiers when the LOW INPUT IMPEDANCE option is selected.
Most high-quality solid state preamplifiers can satisfy these conditions, and
best results are obtained when the output impedance of the preamplifier
(600Ω balanced) matches the input impedance of the power Amplifier
(600Ω balanced). When the impedances are matched, maximum signal
power transfer and signal fidelity are achieved in addition to the advantage
of utilization of long lengths (10 meters and greater) of interconnect
between components with no sonic degradation. However, there will be a
6 dB decrease in volume relative to a mismatched condition (low driving
source impedance driving high load (Amplifier input) impedance).
If there is any doubt as to the compatibility of the above mentioned
components, then HIGH INPUT IMPEDANCE should be selected. Since the
electrical performance of the Model 6 is not changed when selecting
different INPUT IMPEDANCE options, apparent differences in sonic quality
can be attributed to mismatched impedances.
Due to different sensitivities of associated equipment used with the Model 6
Amplifiers, the OVERALL GAIN switch can be used to optimize the total
gain structure of the entire system. This allows the volume control of your
preamp to be used in an ideal mid-range position.
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