User Manual

SX Control Panel & D/A Converter
Control panel with „Virtual Ground Semiconduc-
tor Switch” Technology
Another innovation we present within the SX series is a control panel
with “virtual ground semiconductor switch technology”. That gives
you many different sophisticated controls as well as an accuracy and
repeatability of the values that has been unknown in the analogue
domain so far: whatever value you re-chose, you will get it to within
a <0,005dB accuracy! These panels are used in the models S2X to
S5X.
The rotary step switches on these panels are designed to switch
discrete resistors within a semiconductor resistor network that is
located on the amplifier module in the back of the monitors. They
allow for precise settings, which are much more accurate than usual
potentiometers. These exact settings are a true advantage for every
sound engineer who wants to make sure that switching back from
position ‘b’ to position ‘a’ is exactly the same setting each and every
time. Furthermore, there is no potentiometer-scratching and no
switch-scratching noise because there is no audio signal at the panel
itself – the music signals do not move back and forth between the
amplifier section and the front panel.
The controls at a glance:
• Input sensitivity is handled by two controls: one for coarse set-
tings, -20dB to +8dB in 4dB steps, and one for fine tuning in
0.5dB steps, ranging from -1.5dB to 2dB.
• There are two controls for the lower frequencies: One is an
equalizer at 80Hz that can boost up the response by 6dB in
1dB steps, the second is a shelf filter that allows you to pro-
gressively alter the frequencies below 150Hz in a ± 4dB maxi-
mum range at 2Hz in 1dB increments.
• High frequencies can also be adjusted by two different con-
trols: The first influences the tweeter ± 2dB in 0,5dB steps, the
second is a shelf filter that works for high frequencies above
6kHz in a ± 4dB maximum range at 20kHz in 1dB increments.
DA-SX: High accuracy D/A converter for the SX-
Series
To work directly from digital sources ADAM offers a optional plug-in
D/A converter for the SX series. The converter install easily into the
back of the amplifier module and is designed to handle both AES (via
XLR) and SPDIF signals (via RCA or TOSLINK). Additionally a word
clock input allows external synchronization of the converter. ADAM
Audio’s custom D/A converter is made to the highest technical
standards and excels both in musical accuracy and technical data.
Controls and indicators:
„Mode” indicates:
• the selected input,
• the channel to be reproduced and
• use of the word clock input.
A 5 step analog attenuator is included.
A male XLR output carries the chosen digital input signal so chain-
ing to the other stereo speaker is possible.
Technical data at a glance:
• THD+N @ 1kHz, 0dBFS, 24bit : ≤ -104dB = ≤ 0,0006 %at all
sampling rates, bandwith: 20kHz (acc. to AES17)
• THD+N @ 1kHz, -10dBFS ≤ -98dB = 0,0013 % at all sampling
rates, bandwith: 20kHz (acc. to AES17)
• S/N @ 0dB attenuation: ≥ 114dB
Channel
S/PDIF
AES3
Word Clock In
Digital
Thru
Att.
Mode
DIGITAL INPUTS
Clock
XLR
-0dB -20dB
-10dB -30dB
-40dB
Coax Optical
L R
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