Lavry DA10 User Manual - page 7
LavryBlack DA10
Operation
4
The POLARITY setting is provided for two reasons:
1. To provide flexibility with output connection wiring.
2. To allow the signal polarity to be corrected when it is inverted due to polarity inversion in
the recorded music or other equipment/wiring in your system.
- Please note that this function operates in all configurations of the XLR outputs- balanced,
unbalanced Pin 2 Hot, and unbalanced Pin 3 Hot. The “sense” of the function is reverse for
unbalanced Pin 2 Hot operation and balanced “Pin 2 +” wiring (please see the chart below).
Settings for most XLR to RCA adapters.
Polarity Switch Setting
Balanced output
Unbalanced Pin 2 Hot
Unbalanced Pin 3 Hot
Normal
Pin 2 +, Pin 3 -
Inverted (-)
Non-Inverted (+)
Invert
Pin 2 -, Pin 3 +
Non-Inverted (+)
Inverted (-)
The Polarity of the signal affects the motion of the speaker reproducing the audio, and if incorrect
can affect the fidelity of the audio in a way that will vary with program material. If correct
throughout the recording and reproduction process, a positive air pressure at the microphone will
result in a positive pressure created by the speaker. If it is “inverted,” the speaker will move in the
opposite direction and the resulting acoustic signal will be less accurate. This means that if you
“invert” an inverted signal, it will have the correct Polarity! Because there is no way to detect if the
signal polarity is inverted before it reaches the DA10, there is no direct correspondence between
setting the switch to the “invert” position and whether or not the reproduced signal is actually
inverted. A surprising number of recordings have been made with the polarity inverted.
- Please Note: The audibility of incorrect signal polarity varies widely with music program material,
the audio system, and listening environment. It can range from very subtle to quite apparent.
E. VOLUME CONTROL:
The DA10 features a digitally controlled
analog
Volume circuit to control the volume of the XLR
and Headphone outputs. Even though the control is in discrete 1 dB steps, the change is
accomplished after the DA conversion in the analog domain. This means that the audio is always
converted at FULL RESOLUTION, regardless of the Volume output level.
This approach offers a number of advantages:
- Extremely consistent sound quality regardless of volume; much better than a traditional
potentiometer “knob” type of control.
- Excellent matching between channels at every volume setting for consistent stereo balance.
- Ease of reset-ability for listening or critical monitoring at a consistent level
- The volume setting is non volatile – the unit recalls the last setting when powered ON.
The volume control consists of the numerical display under the VOLUME legend, and the
up
/
down
switch just to the right of the display. The volume can be controlled in 1 dB steps from
full volume (56) to the lowest volume (01). When the display indicates “00,” the signal is muted.
Holding the
up
/
down
switch in either position will cause the Volume setting to change
continuously until the switch is released or the setting reaches the end of the range.
Please be certain to configure the outputs of the DA10 for the proper balanced or unbalanced
setting to match the wiring and inputs of your system. See the section titled CONFIGURING THE
XLR OUTPUTS for details.
F. DETERMINING THE CORRECT VOLUME SETTING FOR YOUR SYSTEM
There are two ways the DA10 can be used to listen to digital audio sources through speakers:
1.) Connect the main output of the DA10 to the input of a receiver or preamp, set the DA10 to a
“fixed” level, and adjust the speaker volume using the volume control of the receiver or preamp.