Power Meter in Watt and dB
Power Meter in Watt and dB
The Stereo Power Meter displays the output power in Watt at 4-Ohm speakers, and
in dB relative to 1 Watt.
Since these electro-mechanical instruments are innately too slow for music pulses,
an electronic circuit analyzes the signals at the speaker output and memorizes the
result until the needle has been able to display it.
The dB level indicator refers to 0dB = 1 Watt.
Decibels (dB) is related logarithmically to power in the following way:
-30dB = one thousandth of the power
-20dB = one hundredth of the power
-10 dB = one tenth of the power
-6dB = a quarter of the power
-3 dB = half the power
+3 dB = twice the power
+6 dB = fourfold the power
+10 dB = tenfold the power
+20 dB = hundredfold the power
+26 dB = fourhundredfold the power
+30 dB = thousandfold the power
Congratulations on the purchase of this exceptional LEF-power amplifier! We would
like to say thank you to support our concept of a very short signal path, for there is the
advantage of being able to select just the required gain.
B.M.C.’s CS2 volume control DIGM = Discrete Intelligent Gain Management avoids
both unnecessary high gain and additional amplifier stages, as well as attenuating the
input signal, as it is done in traditional solutions. The gain required for the desired
sound level is set in the amplifier stage.
The great power supply with 2kW toroid transformer, Balanced-Current Capacitors
and complete stabilization, for the power section as well, is designed unusually
extensive and lavish. This is the ideal base for a silent background and for playing the
very finest detail, as well as explosive dynamics.
CS2 offers 3 different Operating Modes
1: The classical integrated Amplifier mode, with the volume controlled at the unit - or
at the remote control RC1. The volume is managed by DIGM and the CI mode (current
injection) can manually be activated for any XLR input by holding the input key for 5
seconds. CI mode is recommended only for connected B.M.C. components like
BDCD1.1 or the MCCI phono stage.
2: The classical Power Amplifier mode, with volume controlled by a preamplifier.
There is still the advantage of a gain presetting by DIGM, may be for better
signal/noise ratio, adjustment of channels for home cinema use, or matching the CS2
to a mixing console of a recording or mastering studio. Due to the numeric display the
preference gain can be set easily again after an new amplifier power-on.
3: In a consistent B.M.C. Audio chain with an OPTO CONTROL connection DIGM can
be set by the B.M.C. DAC. The DIGM function will be same to the Amplifier mode (1),
with the difference of where to turn the Volume knob. The big advantage of this
operating mode is: You can use any balanced input in CI (Current Injection) mode with
it's audiophile advantage of an advanced and exceptional signal path.
