Goldmund SRM250 - Manual (Page 7)

User manual - SRM250 Power Amplifier | P 6
A M P L I F I E R C O N T R O L S
On the front panel of the GOLDMUND SRM250 amplifier you will find only one switch and
two Leds. To start playing the amplifier, turn the power switch ON. The amplifier is operative
immediately and the green Led indicates it is operating normally.
It is normal for a slight sound to be heard from the speakers when the amplifier is turned
ON or OFF. The SRM250 is self-protected and the sound heard is corresponding to the
charging and discharging of the capacitors. The yellow Led indicates that the digital signal is
locked on a source when the digital input is in use.
S O U N D Q U A L I T Y O P T I M I Z AT I O N
❑ Warm-up sonic effect
If the power amplifier has been powered OFF for some time, the optimum sound quality
may only be reached after 15 minutes. The critical circuits must warm to around +55 degrees
C (+131 degrees Farenheit) for optimum performance. If in recent use, the optimum
temperature may take only 1 or 2 minutes.
❑ Speaker polarity
Even if you have an absolute phase inverter on your preamplifier (as on the GOLDMUND
Mimesis 2 or Mimesis 22M), and you have carefully selected the proper line phase, there is
a possibility to further increase the sonic quality of your speakers by reverting the polarity of
the speaker cable amp termination. Line phase and speaker polarity interfere to each other
however. We therefore recommend careful experimentation with all the combinations in
order to arrive at the best one for your installation.
If your preamplifier has an absolute phase inverter, this will interfere too. If it has not, don't
forget that the result will depend on the source, as most sources (vinyl CD or DVD) are
recorded without care for the absolute phase. Be patient…
❑ Mains line phase inversion
The sonic quality of your GOLDMUND SRM250 can be greatly improved if the main line is
properly connected. Try to invert the mains plugs of both your amplifiers, using special
adapters.
We recommend careful experimentation in this area. This should be in combination with the
speaker polarity and/or with absolute phase switching tests to be sure of finding the best
result for you.
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