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Eclipse mono inputs
The Eclipse mono has four switch selectable inputs,
each having an associated input socket (properties
listed below). The input sockets (p12, fig B, ⑤-⑧)
and switch (p12, fig B, ③) are mounted near the top
rear panel, and the switch must be operator set to
select the desired input.
The balanced voltage input (p12, fig B, ⑤) or
current-mode (p12, fig B, ⑧) input are most
desirable for minimising earth loop generated mains
hum and ripple, or high frequency interference.
Earth loop generated mains hum and ripple, or high
frequency interference should not be a problem
unless the source equipment is poorly designed.
The unbalanced input (p12, fig B, ⑥) is quite
satisfactory so long as earth loop generated mains
hum and ripple are not a problem.
The minimal path input (p12, fig B, ⑦) will result in
Input styles
Required output source impedance
Balanced voltage input
Low impedance. Standard preamplifier or
(p12, fig B, ⑤)
CD player for example
Unbalanced voltage input
Low impedance. Standard preamplifier or
CD player for example
(p12, fig B, ⑥)
Minimal path voltage input
Low impedance. Standard preamplifier or
CD player for example
(p12, fig B, ⑦)
Current-mode input
Very high impedance; "infinite." Halcro pre-
amplifiers with current-mode output, for
(p12, fig B, ⑧)
example
Table 1
the most pure sound; unless earth loop generated
mains hum and ripple are a problem.
Note: The minimal path input is phase inverting.
Please see the Minimal Path Input section for
optimal performance.
Sources with current-mode outputs are rare and are
most likely to have an RCA output socket. The
advantages of this source are that earth loop
generated mains hum and ripple are minimised, and
cable, plug and socket generated interference is
minimised (from poor connections which may be
affected by sound vibration for example).
The input sockets may have active sources
simultaneously connected to them. The selector
switch selects the input to be amplified.
Note: Before connecting or disconnecting inputs
the unit should be OFF or in standby mode
Input socket
Input impedance
XLR
22 kOhms + 22 kOhms
RCA
22 kOhms
RCA
660 Ohms - phase inverting
See Minimal Path Input section
RCA
60 Ohms
14
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