Discontinued the analog idle input short circuit function:
unit had design the analog idle input
(In 5 and In 6) for avoid the disturb between different sources.
This design also applied in a
lot high end
The working theory :
Without the idle input short circuit
input 5 and input 6 had connect two extra DACs, while users select
the either input 5 and input 6 , the another input signal
will fire through the circuits and mix into the using signal, even though this
signal is weak but still can degrade on the sound
With the idle input short
circuit function : if user select either the input 5 and input 6, the
another input signal will short
circuit then no any signal fire through circuits , can keep the sound
quality had not degrade.
Below case users want to discontinued the
idle input short circuit function, pull off the 4 jumpers as mark on the
1, The same extra source not only connect the
unit analog input, but connect with other amps simultaneity.
2, The same extra source connect to the
input 6 and input 5 at simultaneity.
gain of the analog inputs:
Since 15th April 2015, the unit had design the In5 had extra +6DB gain
than the IN6, allow the users connect the low output level source but
had better sound quality. Users can had the A/B compare to confirm which
had the better sound .
The unit bought before the date
and want to had the extra gain with In5 , can order the MCU replace in
the unit without soldering necessary .