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LampizatOr- Amber-3 Manual
Volume control Khozmo Lampizator
(This concerns DACs equipped with volume control modules with display and remote).
The volume control is an extremely nice module, that changes the way we use the
DAC.
It is worth noting that this is THE HIGHEST quality level in volume control domain,
mbetter than chips, opamps, potentiometers, rotary switches, motorized switches,
autotransformers etc. Therefore it is EXTREMELY hard to find an external preamp that
may equal our DAC in sound quality.
The module consists of 5 elements:
1. Power supply with the DAC power management relay, allowing to switchON/OFF
the whole DAC via the remote while keeping the volume module powered.
2. The display - backlit 2 x 16 alpha LCD, which is our GUI.
3. The microprocessor board with memory, firmware and the chip that controls the
relays
4. Relay volume board with resistor ladder. The microprocessor connects the resistors
in such way that they form a resistive attenuation L-Pad with 63 steps of logarithmic
attenuation. The overall impedance is held at almost constant 20k and the steps are
calibrated in 1 db distances.
5. The virtual potentiometer (rotary dial) with push action called the encoder.
The module is capable not only of volume adjustment but also of the input selection-
both analog inputs as well as digital.
Using the volume module: Press the volume knob down and the display will show
selection of 4 analog inputs . Sequential push moves one input up and goes around.
The input selection is available from the remote in direct mode - just press iNPUT
button to choose input.
MUTE function: this is useful to use instead of turning the volume all the way down.
Available ONLY via remote.
POWER OFF - the DAC will be switched off fully but the remote module will be always
alive to enable you to power it ON again.
*** Do not be upset about the “C 2018” text - it means the date the firmware was written
for this module and not the year of manufacturing of the DAC.
0dB operation: at full volume - 0dB the DAC operates as if there was no volume
module. This position is recommended for systems with own volume control: preamp or
integrated amp. The resistor ladder is completely by-passed.
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