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6. ADVANCED FUNCTIONS
6.4. Front Channel Input - Bypass function
The Input labeled “Front Channel“ is coupled with a relay that bypasses the volume regulator. In
the “Front Channel” selector position, the V 70 SE functions as a stereo amplifier.
The signal of the front channel input is not available on the record output.
6.5. Regulated preamplifier output – Pre-Out
6.5.1. Using with a subwoofer
The regulated preamplifier output is most commonly used to drive an active subwoofer. The
Pre Out is decoupled via a separate buffer to prevent the V 70 SE against the load of the
subwoofer. The input impedance of the subwoofer is therefore non-critical.
The Pre Out does not have a separate muting function to prevent switch-on or switch-off plops from
the V 70 SE. This is not normally needed, however, since the active crossover in the subwoofer
electronics will block unwanted DC and low frequency signals.
6.5.2. Using the V 70 SE in bi-amped systems
Another option provided by the adjustable Pre Out is Bi-amping via the V 70 SE's internal
preamplifier. The V 70 SE would ideally handle the mid/high portion of a bi-amping setup, using a
second power amplifier fitted with its own volume control to take care of the bass. In this
configuration, switch-on/switch-off noises from the Pre Out may prove to be a problem. The best
way to deal with this is to make sure the you first switch on the V 70 SE, then the external power
amplifier - and when switching the units off do such in the reverse order.
If you do not have a power amplifier with a separate volume control, you should match the input
sensitivities (or gain) of each amplifier. You will normally find the gain listed in dB in the amplifier's
specification. The figures for each power amplifier should be within 2 dB of each other.
The ideal gain of the external power amplifier is 25 dB / +/-2 dB
.
Configuration of the V 70 SE in bi-amped systems
Pre out
V70SE as
central
control unit
Speaker
to be
biamped
Power
amplifier with
its own
volume
control and
gain factor of
25 dB
Source
component
such as
CD player
Summary of Contents for v70se
Page 1: ...V 70 SE ...
