Samson S-COM PLUS User manual

COMPRESSOR / LIMITEREXPANDER/GATE
GAIN REDUCTION dB INPUT / OUTPUT LEVEL dB
30 24 2127 18 15 9 612 4 2 1 -30 -18 -12-24 -6 -3 +3 +60 +9 +12 +18
FAST
SLOW
RELEASE SPECTRA KEY AUTO I/O METER
COMPRESSOR / LIMITEREXPANDER/GATE CH 2
GAIN REDUCTION dB INPUT / OUTPUT LEVEL dB
30 24 2127 18 15 9 612 4 2 1 -30 -18 -12-24 -6 -3 +3 +60 +9 +12 +18
Sec
FAST
SLOW
RELEASE
GATE
SPECTRA KEY AUTO I/O METER
IN/OUT 1
STEREO LINK
IN/OUT 2
POWER
dB
OFF +10
050
20
62
1
-10
+20-20
+10
0
mSec
.3 300
20015
50
.05 5
3.15
1
OFF 10
73
5
10
-30
+20-40
+10
-10
THRESHOLDTRIGGER RATIO ATTACK RELEASE OUTPUT ENHANCER
GATE KEY
LISTEN
dB dB
4:1
Sec dB dB
OFF +10
050
20
62
1
-10
+20-20
+10
0
mSec
.3 300
20015
50
.05 5
3.15
1
OFF 10
73
5
10
-30
+20-40
+10
-10
THRESHOLDTRIGGER RATIO ATTACK RELEASE OUTPUT ENHANCER
GATE KEY
LISTEN
dB dB
4:1
Sec dB
CH 2CH 1
STEREO
COMPRESSOR
S Class Signal Processors
STEREO COMPRESSOR / LIMITER

Thank you for purchasing the Samson S•com plus dynamics processor. The Samson S•com
plus is a one-space dual channel dynamics processor optimized for recording, live sound
reinforcement systems, DJ set-ups and commercial installations. The S•com plus is a com-
plete dynamics processing solution offering two channels of full function Compressor,
Expander/Gate, Limiter and De-Esser. S•com plus’ convenient meters provide instant status
of important gain management settings.
In these pages, you’ll find a detailed description of the features of the S•com plus dynamics
processor, as well a description of its front and rear panels, step-by-step instructions for its
setup and use, and full specifications. You’ll also find a warranty card enclosed—please
don’t forget to fill it out and mail it in so that you can receive online technical support and so
we can send you updated information about these and other Samson products in the future.
With proper care and adequate air circulation, your S•com plus will operate trouble free for
many years. We recommend you record your serial number in the space provided below for
future reference.
Serial number:
Date of purchase:
Should your unit ever require servicing, a Return Authorization number (RA) must be
obtained before shipping your unit to Samson. Without this number, the unit will not be
accepted. Please call Samson at 1-800-3SAMSON (1-800-372-6766) for a Return
Authorization number prior to shipping your unit. Please retain the original packing materials
and if possible, return the unit in the original carton and packing materials.
Introduction
ENGLISH
4

S•com plus Features
The Samson S com Plus dynamics processor utilizes the latest technology in gain management design. Here are
some of its main features:
• Full featured, dual channel dynamics processor including Compressor/Limiter, Expander/Gate, De-Esser
and Peak Limiter.
• SKD (Smart Knee Detector) switches from soft to hard knee based on the level of input signal.
• AEG (Automatic Envelope Generator) mode constantly adjusts the Compressor’s Attack and Release
times based on input signal. Manual adjustment of Attack and Release time is also facilitated.
• 12 Segment LED Input/Output Meter, plus 12 Segment LED Gain Reduction Meter.
• External Keying with Key Switch available on front panel.
• Adjustable De-Esser with independent LED meter for reducing annoying sibilance from recorded tracks.
• Expander/Gate with variable Trigger control and switchable Fast and Slow Release time.
• Gate function can be switched from hard Off to Light Downward Expander.
• Gate Open and Closed LED's.
• Peak Limiter with independent Threshold control and Peak LED.
• Advanced circuit design, utilizing low noise operational amplifiers and high quality VCAs.
• Stereo Link Switch.
• Servo balanced inputs and outputs on XLR and 1/4” connectors.
• Switchable +4 and –10 operating levels.
• High quality 41 position detent pots and backlit switches.
• The stylish bead blasted electric blue anodized front-panel is as easy to read as it is to look at.
• Three-year extended warranty.
EXPANDER/GATE COMPRESSOR / LIMITER
GAIN REDUCTION dB INPUT / OUTPUT LEVEL dB
30 24 2127 18 15 9 612 4 2 1 -30 -18 -12-24 -6 -3 +3 +60 +9 +12 +18
DE-ESSER LEVEL dB
-3 -60-9-12
LIMIT
CH 1
RELEASE AUTO I/O METER IN/OUT
dB
OFF +10
050
20
TRIGGER
GATE
10
-30
+20-40
+10
-10
THRESHOLD
dB
ENHANCER
62
1
RATIO
dB
4:1
KEY
ATTA CK
mSec
.3 300
20015
50
.05 5
3.15
1
RELEASE
Sec
-10
+20-20
+10
0
OUTPUT
dB
010
73
LEVEL
dB
5
0 OFF
16+5
LIMITER
dB
+12
IN/OUT 1
STEREO LINK
IN/OUT 2
EXPANDER/GATE COMPRESSOR / LIMITER
GAIN REDUCTION dB INPUT / OUTPUT LEVEL dB
30 24 2127 18 15 9 612 4 2 1 -30 -18 -12-24 -6 -3 +3 +60 +9 +12 +18
DE-ESSER LEVEL dB
-3 -60-9-12
LIMIT
CH 2
RELEASE AUTO I/O METER IN/OUT
dB
OFF +10
050
20
TRIGGER
GATE
10
-30
+20-40
+10
-10
THRESHOLD
dB
ENHANCER
62
1
RATIO
dB
4:1
KEY
ATTA CK
mSec
.3 300
20015
50
.05 5
3.15
1
RELEASE
Sec
-10
+20-20
+10
0
OUTPUT
dB
010
73
LEVEL
dB
5
0 OFF
16+5
LIMITER
dB
+12
POWER
STEREO
COMPRESSOR
LIMITER
DE-ESSER
DE-ESSER
ENGLISH
5
Auto Envelope
GENERATOR Smart Knee DETECTOR Enhanced
Frequency
RECOVERY

1 GATE OPEN & CLOSED LED - Indicates when
the gate is open or closed.
2 GAIN REDUCTION METER - Displays the
amount of Gain Reduction when Compressor
circuit is activated.
3 INPUT/OUTPUT METER - Displays the Input
or Output signal level based on the settings of
the I/O meter switch.
4 DE-ESSER METER - Displays the amount of
De-Esser effect.
5 LIMITER METER - Display light indicates
when LIMITER circuit is engaged.
6 STEREO LINK SWITCH- When engaged
Channel 2 functions are controlled by the set-
tings on Channel 1.
7 CHANNEL 2 CONTROLS - The same knob and
switch complement as Channel 1 .
Controls and Functions
22
123456
10 12
11
14 15
13 16 17 18 19 20 21 23 24 26
25
EXPANDER/GATE COMPRESSOR / LIMITER
GAIN REDUCTION dB INPUT / OUTPUT LEVEL dB
30 24 2127 18 15 9 612 4 2 1 -30 -18 -12-24 -6 -3 +3 +60 +9 +12 +18
DE-ESSER LEVEL dB
-3 -60-9-12
LIMIT
CH 1
RELEASE AUTO I/O METER IN/OUT
dB
OFF +10
050
20
TRIGGER
GATE
10
-30
+20-40
+10
-10
THRESHOLD
dB
ENHANCER
62
1
RATIO
dB
4:1
KEY
ATTAC K
mSec
.3 300
20015
50
.05 5
3.15
1
RELEASE
Sec
-10
+20-20
+10
0
OUTPUT
dB
010
73
LEVEL
dB
5
0OFF
16+5
LIMITER
dB
+12
IN/OUT 1
STEREO LINK
IN/OUT 2
EX
P
O
50
T
R
STEREO
COMPRESSOR
LIMITER
DE-ESSER
8 MAINS POWER SWITCH - When turned on, acti-
vates the S•com plus.
9 RACK EARS - Used for mounting into a 19-inch
standard rack.
10 TRIGGER- Controls the threshold level that the
Expander/Gate becomes active.
11 GATE SWITCH - Selects either Gate or Expander
mode.
12 RELEASE SWITCH - Selects FAST or SLOW Release
Time for EXPANDER/GATE.
13 THRESHOLD - Used to set the minimum signal
level at which the Compressor circuit begins to
function.
14 ENHANCE - Activates S• com plus’ Enhanced
Spectrum Recovery circuit restoring the high end
loss resulting from extreme Gain Reduction.
15 RATIO - Controls the amount Gain Reduction in
proportion to the amount of signal over the
selected threshold level.
A AC INLET - IEC standard AC Power cable
Connector.
B CHANNEL 2 XLR INPUT - XLR Balanced line
input.
C CHANNEL 2 1/4” TRS INPUT - 1/4” TRS
Balanced line input.
D OPERATING LEVEL SWITCH - Switches the oper-
ating level from -10dB to +4dB.
E CHANNEL 2 KEY INPUT - Input connection
allowing external control of the S•com plus’
Compressor detection circuit.
F CHANNEL 1 KEY OUTPUT - S• com plus’ detec-
tor circuit is sent here. Use the Key Output to
process the compressor’s detector through an
external effect like an equalizer.
BALANCED
OUTPUT
BALANCED
INPUT INPUT OUTPUT
KEY
CHANNEL 2
LEVEL
+4
-10
ABCDEF G H
REAR PANEL LAYOUT
ENGLISH
6
FRONT PANEL LAYOUT

89
7
1
L
INK
2
EXPANDER/GATE COMPRESSOR / LIMITER
GAIN REDUCTION dB INPUT / OUTPUT LEVEL dB
30 24 2127 18 15 9 612 4 2 1 -30 -18 -12-24 -6 -3 +3 +60 +9 +12 +18
DE-ESSER LEVEL dB
-3 -60 -9 -12
LIMIT
CH 2
RELEASE AUTO I/O METER IN/OUT
dB
OFF +10
050
20
TRIGGER
GATE
10
-30
+20-40
+10
-10
THRESHOLD
dB
ENHANCER
62
1
RATIO
dB
4:1
KEY
ATTAC K
mSec
.3 300
20015
50
.05 5
3.15
1
RELEASE
Sec
-10
+20-20
+10
0
OUTPUT
dB
010
73
LEVEL
dB
5
0OFF
16+5
LIMITER
dB
+12
POWER
DE-ESSER
Controls and Functions
16 KEY SWITCH - Selects the key input so that an
external signal may trigger the compressor.
17 ATTACK - Adjusts the amount of time the com-
pressor takes to reach full gain reduction.
18 AUTO - Activates S •com plus’AEG (Auto Envelope
Generator) which dynamically adjusts the attack
and release time based on signal content.
19 RELEASE - Adjusts the length of time the com-
pressor takes to return the signal to it’s original
level.
20 INPUT/ OUTPUT METER SELECT SWITCH -
Selects either Input or Output level to be dis-
played on the Input/Output Meter.
21 LEVEL - Controls the amount of Output level.
22 DE-ESSER LEVEL - Displays light indicating when
Limiter circuit is engaged.
23 DE-ESSER IN/OUT Switch - Activates DE-
ESSER circuit.
24 Limiter - Sets the level at which LIMITING
begins.
25 CHANNEL 1 IN/OUT - Activates S•com plus
Channel 1.
26 CHANNEL 2 IN/OUT - Activates S•com plus
Channel 2.
NCED
T
PUT
BALANCED
OUTPUT
BALANCED
INPUT INPUT OUTPUT
KEY
CHANNEL 1
LEVEL
+4
-10
STEREO
COMPRESSOR
LIMITER
I
G CHANNEL 2 XLR OUTPUT - XLR Balanced line out-
put.
H CHANNEL 2 1/4”TRS OUTPUT - 1/4”TRS
Balanced line output.
I CHANNEL 1 - Same inputs and outputs as
Channel 1.
ENGLISH
7

Operating The S•com plus
Whether you are an experienced audio engineer, just starting out, or you just want to experiment, follow the steps
below to get going. Further sections in this manual will cover basic dynamics and the associated parameters, sys-
tem set-ups and applications for using dynamics processing in recording and live sound applications.
SETTING UP THE S•com plus
• Connect one or both sets of inputs and outputs to the designated connectors on the rear panel.
• Set the controls to the following positions:
EXPANDER/GATE TRIGGER – OFF
GATE SWITCH – OUT
FAST RELEASE – OUT
COMPRESSOR THRESHOLD – +20dBu (fully clockwise)
ENHANCER - OUT
RATIO – 1:1
KEY SWITCH - OUT
ATTACK – 0.3 (fully counter-clockwise)
AUTO SWITCH- OUT
RELEASE - 5 (fully clockwise)
METER SWITCH – IN
OUTPUT LEVEL – O dBu
DE-ESSER – 0 (fully counter-clockwise)
DE-ESSER SWITCH – OUT
LIMITER – OFF (fully clockwise)
STEREO LINK SWITCH – OUT
CHANNEL 1 ENGAGE – OUT
EXPANDER/GATE COMPRESSOR / LIMITER
GAIN REDUCTION dB INPUT / OUTPUT LEVEL dB
30 24 2127 18 15 9 612 4 2 1 -30 -18 -12-24 -6 -3 +3 +60 +9 +12 +18
DE-ESSER LEVEL dB
-3 -60 -9 -12
LIMIT
CH 1
RELEASE AUTO I/O METER IN/OUT
dB
OFF +10
050
20
TRIGGER
GATE
10
-30
+20-40
+10
-10
THRESHOLD
dB
ENHANCER
62
1
RATIO
dB
4:1
KEY
ATTAC K
mSec
.3 300
20015
50
.05 5
3.15
1
RELEASE
Sec
-10
+20-20
+10
0
OUTPUT
dB
010
73
LEVEL
dB
5
0 OFF
16+5
LIMITER
dB
+12
IN/OUT 1
STEREO LINK
IN/OUT 2
STEREO
COMPRESSOR
LIMITER
DE-ESSER
In this configuration, the S•com plus is simply passing audio at unity gain with no dynamics processing. It is a
good idea to check your gain structure at this point. Use the Input/Output meter to match the level.
•Send a signal to either or both of the S•com plus’ inputs and outputs.
• Press the METER switch to see that the input and output levels are matched.
COMPRESSING A SIGNAL
S•com plus' Compressor section can be used for a variety of gain management tasks including printing signals to
a multi-track recorder, as a mix-down effect, mastering, and for increasing the loudness of a live PA system. To
begin compressing your signal, follow the steps below:
• Follow the section above, “SETTING UP THE S•com plus” for normalizing the controls.
• Press the CHANNEL IN switch (located in the middle of the unit) to the IN position.
• Press in the AUTO switch (located in-between ATTACK and RELEASE).
• Adjust the Ratio to 2:1.
ENGLISH
8

9
Operating The S•com plus
• Now gradually turn down the THRESHOLD level and
listen for the compression. For a visual representation,
the amount of compression is indicated on the GAIN
REDUCTION meter.
• Press out the AUTO button to experiment with manually
controlled ATTACK and RELEASE times.
E
R/GATE COM
P
GAIN REDUCTION dB
30 24 2127 18 15 9 612 4 2 1 -
3
RELEASE
0
0
R
GATE
10
-30
+20-40
+10
-10
THRESHOLD
dB
ENHANCER
62
1
RATIO
dB
4:1
KEY
ATTA
C
mSe
c
.3 3
0
15
50
GATING A SIGNAL
Unwanted noises, buzzes and hisses can be easily removed by using S•com plus’ GATE. The idea is to have the
Gate open only when your desired signal is playing and to mute off (Gate closed) the unwanted noise, buzz and
hiss. To Gate your signal, do the following:
• Follow the section above,” SETTING UP THE S•com plus” for normalizing the controls.
• To engage the Gate, make sure that the EXPANDER/GATE switch is pressed in.
EXPANDER/GATE
G
30 24
2
27
RELEASE
dB
OFF +10
050
20
TRIGGER
GATE
10
-30
+
2
-40
-10
THRES
H
dB
STEREO
COMPRESSOR
LIMITER
• Press the RELEASE switch to the IN position to select
FAST release time.
• Now increase the THRESHOLD level and listen as the
signal begins to gate. For a visual representation of the
gate opening and closing, look at the GATE
OPEN/CLOSED LED’s located above the
EXPANDER/GATE TRIGGER control.
USING THE DOWNWARD EXPANDER
You can set the S•com plus' Gate section to work as a DOWNWARD EXPANDER to lower the volume of a sig-
nal. Try the simple steps below:
• Follow the section above, “SETTING UP THE S•com plus” for normalizing the controls.
• To engage the EXPANDER, make sure that the EXPANDER/GATE button is switched to the OUT posi-
tion.
• Press the RELEASE switch out to select a SLOW RELEASE.
• Now increase the TRIGGER level and listen as the signal begins to get softer.
ENGLISH

10
ENGLISH
Operating The S•com plus
USING THE PEAK LIMITER
The Peak Limiter on S•com plus can be used in recording to insure that the output levels do not exceed a certain
level and in PA applications, for speaker protection. To audition S•com plus’ PEAK LIMITER try the following.
• Follow the section above, “SETTING UP THE S•com plus” for
normalizing the controls.
• To engage the PEAK LIMITER, adjust the LIMITER threshold
control knob to the maximum output level desired.
• The LIMIT LED above the LIMITER threshold control knob
indicates when the limiter circuit is kicking in. If the LED
does not light, you have not reached the maximum level.
USING THE ENHANCER
The S•com plus’ ENHANCER switch can be engaged to activate the EFR (Enhanced Frequency Recovery) cir-
cuit. By engaging the ENHANCER, the S•com plus EFR restores the high frequency content that can be lost
when high gain reduction is applied. The S•com plus EFR achieves this by adding back the high-end of the origi-
nal signal in an amount that is equal to the amount of gain reduction.
• Follow the section above, “SETTING UP THE S•com plus” for nor-
malizing the controls and run a signal such as a CD through the
S•com plus.
• Press the CHANNEL IN switch (located in the middle of the unit) to
the IN position.
• Press in the AUTO switch (located in-between ATTACK and
RELEASE).
• Adjust the Ratio to 6 - 8:1.
• Switch on the ENHANCER and listen to how the high end is
restored when the ENHANCER is on.
USING THE DE-ESSER
The S•com plus’ De-Esser is a powerful tool for removing annoying problems like heavily sibilant vocal tracks or
bright cymbals. To listen to the De-Esser try the following:
• Follow the section above, “SETTING UP THE S•com plus” for
normalizing the controls.
• To engage the De-ESSER, make sure that the DE-
ESSER switch is pressed in.
• Now increase the De-ESSER level and listen as the high
frequency component of the signal begins get softer.
• You will see the amount of high frequency gain reduction
displayed in the De-ESSER level meter.
Note: For Detailed De-Essing - Since the Compressor and DE-ESSER share the same ATTACK and RELEASE
settings you may consider using one of the S•com plus’ channels exclusively for DE-ESSING. Experiment with
fast ATTACK and RELEASE times when using the channel for DE-ESSING only.
/
GATE
GAIN REDUCTION dB
30 24 2127 18 15 9 612 4 2
R
ELEASE
0
GATE
10
-30
+20-40
+10
-10
THRESHOLD
dB
ENHANCER
62
1
RATIO
dB
4:1
KE
Y
E
-ESSER LEVEL dB
-3 -6
0
-9 -12
LIMIT
CH 1
IN/OUT
010
7
LEVEL
dB
5
0OFF
16+5
LIMITER
dB
+12
IN/OUT 1
STEREO LINK
IN/OUT 2
5
DE-ESSER
B
+
9 +12 +18
DE-ESSER LEVEL dB
-3 -60 -9 -12
LIMIT
CH 1
IN/OUT
+20-20
+10
0
OUTPUT
dB
010
73
LEVEL
dB
5
0 OFF
16+5
LIMITER
dB
+12
S
DE-ESSER

11
Dynamics Processing 101
To begin to understand dynamics processing, we must first understand what dynamics are. Dynamics, or the
dynamic range of a signal or audio device, is the amount of level between the softest and loudest possible out-
put. Dynamics processing is applied to a signal to manage the changes in level. Various types of processing
units are available to control dynamics including Noise Gates, Expanders, Compressors, Limiters and De-Essers.
All of these processes have a unique effect on a signal, but one common element they share is that in one way or
another they control gain. Some dynamics processors control gain in a subtle way by slightly reducing how soft
and loud a signal is, while others make drastic changes in gain like reducing the signal until it’s off. Applications
for dynamics processing can be categorized by two distinct groups; first, to treat a signal that has an unpre-
dictable dynamic range and make it predictable, and second, to create a "sound" by squeezing out the dynamic
range. Whether used for a live sound application, recording, mixing or mastering, dynamic processors like the
S•com plus are valuable tools for controlling gain. The following is a basic overview of dynamics processing and
how it is used to improve the quality of recorded and live sound.
COMPRESSOR
A good compressor is one of the most useful tools in live sound and recording. Compressors are used to control
the dynamic range of a signal, which offers a variety of benefits including leveling a signal that’s being recorded,
having an instrument sit in the mix, and increasing the loudness of a sound system to name a few. Drastic
amounts of compression will also result in an effect that becomes more of a sound, than just controlling gain. To
understand how a compressor works, it is necessary to become familiar with the basic parameters which include
threshold, ratio, attack time, and release time.
Threshold
Threshold is the level that once the signal exceeds, gain reduction is applied. The normal range of adjustment for
the threshold level is –40 to +20 dBu. If the threshold level is set above the highest level of the signal being sent
to the compressors, the gain reduction is never triggered. Therefore, the compressor is virtually by-passed. If
the threshold level is set very low so that any signal will trigger gain reduction, the compressor is working as an
automatic leveler.
Ratio
The ratio control is used to set the proportion of gain reduction in relationship to the input signal. For example if
the ratio is set to 2:1 and the signal crosses above the threshold level, an increase in level of 2 dB will produce a
1 dB increase in level at the output. A ratio setting of ∞to 1 means that an infinite amount of input signal is need-
ed to raise the output level by 1 dB. This means that the output level stays constant even when the input crosses
over the threshold level.
Attack Time
Attack time is the amount of time that a compressor takes to effect the gain reduction after the signal rises above
the threshold level. A well-designed compressor has adjustable attack times ranging from 100 µs (microseconds)
to 150 ms (milliseconds). A good compressor will sound smooth as it begins to control the gain regardless of the
attack time.
Release Time
The release time is set to control how long the compressor takes to return the input signal back to its original level
once the signal falls below the threshold level. The acceptable range for release time is from 50µs to 5 seconds.
In normal use, faster release times are used for spoken word and longer release times are generally better for
instrumental music.
Auto Attack and Release
Today, sophisticated compressors often incorporate a dynamic or Auto Attack and Release mode. The S•com
plus’ AEG (Auto Envelope Generator) is such a mode which when engaged, automatically adjusts the attack and
release time based on the dynamically changing input signal.
ENGLISH

12
ENGLISH
Dynamics Processing 101 - Continued
Soft-Knee / Hard-Knee
In order to prevent harsh, unnatural envelopes on compressed signals sophisticated dynamics processors like
the S•com plus feature an SKD (Smart Knee Detector) or automatic knee circuit. The Smart Knee Detector auto-
matically switches from Soft-Knee when the signal is less than 10 dB over Threshold, to Hard-Knee when the sig-
nal is 10db above Threshold. In Soft-Knee mode, there is a gradual effect on gain change, which begins as the
signal approaches the Threshold level. In Hard-Knee mode, gain reduction is linear based on the Threshold and
Ratio controls. Any signal that falls below the Threshold level will be unprocessed.
Noise Gates
Noise gates are used to remove unwanted noise and/or bleed from recorded tracks in the studio or from open
microphones in live sound systems. Noise gates can also be used as a sound effect, most commonly to chop the
end of a reverb let’s say on a snare drum so that the entire snare sound ends just before the beat. The basic
principle of a noise gate is to work as an automatic mute switch. Mute off (Gate Open) when the desired signal is
present and mute on (Gate Closed) when the desired signal is not present. In order to get the gate to work pre-
dictably, it is necessary to set a threshold, or trigger level that will determine when the gate will open. If the sig-
nal is below the trigger the gate will remain closed. When the signal is above the trigger, the gate will trigger
open allowing the desired signal to pass and be heard. Noise gates often have other adjustable controls like
attack, hold, range and release. Many noise gates like the S•com plus use sophisticated circuits to control some
of these parameters automatically.
Downward Expander
The purpose of a well-designed Downward Expander is to increase the perceived dynamic range of a system.
This is accomplished by decreasing the gain during the softer sections, thereby lowering the relative noise floor.
When the signal level is below the desired trigger level, the expander lowers the overall gain by the selected
amount.
Limiter
A Limiter is a specific form of a compressor configured to prevent peaks and for general overload protection. The
S•com plus offers a Limiter section with independent controls designed to work in conjunction with the
Compressor section. The operating range of the Limiter is from 0 to +20dB and when engaged, protects against
signal peaks, overloads and excess modulation in broadcast situations.
Stereo Link Mode
The S•com plus can be configured from dual-mono operation to stereo by using the Stereo Link switch. In Stereo
Link mode, Channel 2 functions are controlled by the settings of Channel 1 with the exception of IN/OUT, KEY
and LIMITER.
Side Chain / External Key
The S•com plus features a side-chain or external Key function. The external Key function is used to externally
process the compressor’s detector circuit. There are many useful applications for processing the detector circuit
including Equalizing for frequency dependent compression, De-Essing - the use of EQ to remove sibilance, and
externally keying off a vocal track for Ducking effects to name a few. Selecting the Key function on S•com plus’
front panel, interrupts the compressors detector path and routes it to the Key Output jack. The Key Input jack
receives the externally processed signal, which will now control the compressor’s detector.

13
Applications
Using the Expander/Gate to Remove Hiss and Noise
The S•com plus is an extremely useful tool in reducing the level of unwanted noises. By using the Expander/Gate
you can effectively fade the noise into the noise floor or abruptly turn the unwanted signal completely off.
Let’s say you want to reduce the bleed or cross talk that occurs when different instruments are recorded in close
proximity to each other. You have recorded an acoustic guitar simultaneously in the same room as with some
other acoustic instruments. The problem is that you hear a lot of the other instruments playing when the acoustic
guitar is silent. This can cause phasing and comb filtering problems due to microphone placement, so having the
bleeding signal drop into the noise floor is desirable. To do this, set the S•com plus to Expander mode with the
Release switch to Slow and adjust the Threshold so that the acoustic guitar signal is well above the threshold
level. When the signal from the acoustic guitar track falls below the threshold level, the signal subtly fades into
the noise floor.
Now let’s say you’re attempting to remove the pick-up noise and hum from a guitar track that was recorded
through a loud amplifier. The hum and noise is most noticeable in-between the rhythm of the performance, so you
want to have the gate close during the silent parts and open during the musical passages. To do this, set the
S•com plus to Gate mode and adjust the Trigger level so that the gate is open just during the musical guitar parts,
and so that the gate is closed during the silent passages so that the hum and noise is muted.
Gating Drums
Using noise gates on drums is particularly useful in recording and in live sound. When a drum kit is set up with
individual microphones on each drum in a live PA system, there’s potential for great sound. However, there are
several gain management problems that can occur. Several microphones like the ones on the tom-toms, will only
be used occasionally and until the time that the tom-tom is actually played, its microphone is merely picking up
unwanted sound from other instruments on stage. This adds a lot of unwanted mush in the mix and also adds to
feedback problems. Use the S•com plus to gate the signal of the tom-tom by selecting Gate with the
Expander/Gate switch. Now adjust the Trigger control so that the gate opens only when the tom-tom is played,
and at the same time, so that the gate is closed even when the adjacent tom-tom is played. This same technique
is useful on drums that have been recorded on individual tracks. By using the Gate to mute the bleed of the other
drums, you can effectively reduce the comb filtering produced by phase cancellation due to microphone proximity.
Gating Longer Sounds
When using a noise-gate on sound with a longer decay like piano, it is usually necessary to use a longer release
time. Run the piano signal through the S•com plus and set the Expander/Gate Release switch to Slow. Adjust
the Trigger level on sustained passages to get the best results. Be sure to listen for the natural decay of the
instrument and allow the gate to remain open until just after end of the decay.
ENGLISH

14
ENGLISH
Leveling a Vocal Track
When recording a vocal track, the vocalist may change the distance between them and the microphone, or they
may naturally have a lot of dynamic range in their performance. In either case, the sound engineer must decide
how much compression should be used to balance the natural performance and printing a good level to tape or
disk. Set up the S•com plus with a medium attack and release time and a ratio of 4:1. You can also use the Auto
button to engage the AEG (Auto Envelope Generator) for automatic attack and release. Now adjust the Threshold
level so that the Gain Reduction meters show 6 to 10 dB of gain reduction. Adjust the Ratio control if necessary.
Leveling a Guitar or Bass
Guitar and especially bass guitar can have a lot of level change between strings and even frets on the finger-
board. Using compression when recording guitars and bass will even out these differences. Set up the com-
pressor section of the S•com plus with a medium attack and release time and a ratio of 4:1. You can also use the
Auto button to engage the AEG (Auto Envelope Generator) for automatic attack and release. Now adjust the
Threshold level so that the Gain Reduction meters show 10 to 12 dB of gain reduction. You’ll notice that the each
note is at the same loudness and the overall sustain is increased.
Compressing Drums
Adding compression on drums can make a boomy kick drum tighten up, almost as if you were tightening the head
of a drum. Set the S•com plus to a fairly quick attack time and use a ratio of 6:1. Set the Threshold so that the
Gain Reduction meter reads 12 to 15 dB. Adjust the Ratio control if necessary. You can use the same basic set
up on snare and toms as well.
Getting a Track to Sit in the Mix
By using a heavy amount of compression you can get the effect of the vocal suspending in the mix. While this
may be a bit radical for some, the effect can be dramatic especially if the vocal is mixed without any reverb or
delay. Set up the compressor section of the S•com plus with a medium attack and release time and a ratio of 6:1.
You can also use the Auto button to engage the AEG (Auto Envelope Generator) for automatic attack and
release. Now adjust the Threshold level to so that the Gain Reduction meters show 21 to 24 dB of gain reduction.
Speaker Protection
There are several ways to use a compressor to protect a speaker system and many considerations can be made
including whether the speaker system is crossed over actively or passively.
If the speaker system is stereo using a passive crossover, then the line output of the mixer or equalizer is run
directly into the S•com plus inputs. The S•com plus should be last in the chain before the power amps with its
outputs feeding the inputs of the amp. Now set the S•com plus to Stereo Link mode and use the Auto button to
engage the AEG (Auto Envelope Generator) for automatic attack and release. Adjust the Threshold and Ratio so
that the system’s entire dynamic range is under control. Set the Limiter control to +12 and gradually adjust it until
it is 1 to 2dB below the clip level of your power amps.
When using an active crossover, multiple compressors can be used to compress each section of the PA. For exam-
ple, if the PA is using an active crossover to run a four-way mono system, two S•com plus’ can be used for four
band compression. By compressing each output of the crossover, you can maximize the output level while minimiz-
ing the gain to sensitive speakers like the mid-range. Run the low and low-mid frequencies into two channels of the
first S•com plus and the high-mid and high frequencies into channel one and two of the second S•com plus.
Applications

15
S•com plus System Set-Ups
BRIDGED PARALLEL
STEREO
BALANCED
0dBm
CH 2 CH 1
BALANCED
0dBm
INPUT
~AC INPUT
115V60Hz, 1100W
25A/250V
PUSH TO RESET
(4Ω~8Ω) (4Ω~8Ω)
(4Ω~8Ω) (4Ω~8Ω)
CH 2 CH1
OUTPUT
TRS
BALANCED
TIP=HOT
RING=COLD
SLEEVE=GND XLR
BALANCED
3=COLD
1=GND
2=HOT
BRIDGED PARALLEL
STEREO
BALANCED
0dBm
CH 2 CH 1
BALANCED
0dBm
INPUT
~AC INPUT
115V60Hz, 920W
20A/250V
PUSH TO RESET
(4Ω~8Ω) (4Ω~8Ω)
(4Ω~8Ω) (4Ω~8Ω)
CH 2 CH1
OUTPUT
TRS
BALANCED TIP=HOT
RING=COLD
SLEEVE=GND
XLR
BALANCED 3=COLD
1=GND
2=HOT
SAMSON TECHNOLOGIES CORP., HICKSVILLE, NEW YORK
TO PREVENT SHOCK DO
NOT OPEN. NO USER
SERVICABLE PARTS
INSIDE. REFER SERVICING
TO QUALIFIED SERVICE
PERSONNEL. TO PREVENT
FIRE OR SHOCK HAZARD
DO NOT EXPOSE TO RAIN
CAUTION
HEATSINKMAY BE
HOT!DO NOT BLOCK
AIRFLOWOR OVER-
HEATINGMAY OCCUR
RISKOF ELECTRIC SHOCK
DONOT OPEN
SERIAL
NUMBER
F
U
S
E
FUSE
FUSE RATING
12A/250V(115V)
6A/250V(230V)
CAUTION !
~ACINPUT
115V/230W,50/60HZ
510W(115V)900W (230V)
USE CLASS 2 WIRING MAXIMUM LOAD IMPEDANCE 4Ω
RIGHT LEFT
+RIGHT LEFT+
GROUND
OUTPUT 250W/4Ω
SERVO 550 STUDIO AMPLIFIER
RIGHT
LEFT
BRIDGED
MONO STEREO
INPUTS
(BALANCED
10KΩ/0dBm0)
TIP RING SLEEVE
TIP +
RING -
SLEEVE GND
PL 1602 16 CHANNEL LINE MIXER
SAMSON TECHNOLOGIES CORP., NEW YORK, U.S.A.
CAUTION
RISKOF ELECTRIC SHOCK
DONOT OPEN
!
120V - 60 Hz 35W
POWER
RATING
AVIS:
RISQUEDE CHOC ELECTRIQUE
NEPAS OUVRIR
DONOT EXPOSE THIS EQUIPMENT
TORAIN OR MOISTURE
ON
OFF
MIC 3MAIN OUT
BALANCED 600 +4db
TIP + RING - SLEEVE GND
AUX
RETURNS
UNBALANCED 10KΩ
1L
AUX SEND
UNBALANCED
2KΩ+4db
2R
1L2R3L4R5L6R7L8R9L10R11L12R13L14R15L16R
INPUTS BALANCED 10KΩ-30 to +4db TIP + RING - SLEEVE GND.
6R 5L 4R 3L 2R 1L
INSERTS TIP RETURN RING SEND
1
2
3
1
2
3
-40+4
0
-10
TRIM
-40+4
0
-10
TRIM
1L2R3L4RLRLR BUS
INSERTS
MIXER LINKING
110
POWER S / N
~115V(0.3A)
230V(0.15A)
50/60Hz 30W
MIC 1
XLR
PIN 1 GND
PIN 2 HOT
PIN 3 NEG
PHONE
TIP - POS
RING - NEG
SLEEVE - GND
SERIALNUMBER
MADEIN CHINA
CAUTION
RISKOF ELECTRIC SHOCK
DONOT OPEN.
_ mA SLOW BLOW FUSE FOR 115V
_ mA SLOW BLOW FUSE FOR 220V
CHANNEL 2
-10
+4
BALANCED
INPUT
BALANCED
OUTPUT
CHANNEL 1
LEVEL
-10
+4
KEY
INPUT OUTPUT
KEY
INPUT OUTPUT
LEVEL
BALANCED
INPUT
BALANCED
OUTPUT
S com Plus
1
2
3
1
2
3
1
2
3
1
2
3
ON
OFF
POWER
E30 2/3 OCTAVE STEREO 15 BAND GRAPHIC EQUALIZER
SAMSON
TECHNOLOGIES
CORP.,
NEW YORK, U.S.A.
INPUTS
OUTPUTS
BALANCED
<100KΩ0db
UNITYGAIN
SERIAL NUMBER
CAUTION
RISKOF ELECTRIC SHOCK
DONOT OPEN !
120V - 60 Hz 20W
POWER
RATING
AVIS: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR. DO NOT EXPOSE
THIS EQUIPMENT TO RAIN OR MOISTURE. BALANCED
10KΩ
BALANCED<100Ω
0dbUNITY GAIN BALANCED
0dbUNITY GAIN
BALANCED
0dbUNITY GAIN BALANCED
10KΩ
BALANCED
<100KΩ0db
UNITYGAIN
BALANCED<100Ω
0dbUNITY GAIN
115V/230V 50/60Hz13W
~AC INPUT
CHANNEL ACHANNEL BCHANNEL ACHANNEL B
MODE
STEREO
2 WAY
STEREO
3 WAY
MONO
4 WAY
CHANNEL
1 INPUT
CHANNEL
1 INPUT
MONO
INPUT
CH 1
LOW
OUTPUT
CH 1
LOW
OUTPUT
MONO
LOW
OUTPUT
CH 1
MID
OUTPUT
MONO
LOW-MID
OUTPUT
CH 1
HIGH
OUTPUT
CH 1
HIGH
OUTPUT
CH 2
INPUT
CH 2
INPUT
CH 2
LOW
OUTPUT
CH 2
LOW
OUTPUT
CH 2
MID
OUTPUT
MONO
HIGH-MID
OUTPUT
CH 2
HIGH
OUTPUT
CH 2
HIGH
OUTPUT
MONO
HIGH
OUTPUT
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
PL1602 Mixer
Servo 550 Power Amp (High)
S1500 Power Amp (Mid)
S2000 Power Amp
(Bridged Mono Low)
S•Com Plus
S•3 Way
E30 Dual 15 Band EQ
Left High / Mid
Right High / Mid
Mono
Sub
LIVE SOUND SYSTEM WITH STEREO COMPRESSION
In this example, the S•com plus is inserted after the mixer and before the graphic equalizer,
thereby compressing the full range signal from the mixer.
ENGLISH

16
ENGLISH
S•com plus System Set-Ups
BRIDGED PARALLEL
STEREO
BALANCED
0dBm
CH 2 CH 1
BALANCED
0dBm
INPUT
~AC INPUT
115V60Hz, 1100W
25A/250V
PUSH TO RESET
(4Ω~8Ω) (4Ω~8Ω)
(4Ω~8Ω) (4Ω~8Ω)
CH 2 CH1
OUTPUT
TRS
BALANCED
TIP=HOT
RING=COLD
SLEEVE=GND XLR
BALANCED
3=COLD
1=GND
2=HOT
BRIDGED PARALLEL
STEREO
BALANCED
0dBm
CH 2 CH 1
BALANCED
0dBm
INPUT
~AC INPUT
115V60Hz, 920W
20A/250V
PUSH TO RESET
(4Ω~8Ω) (4Ω~8Ω)
(4Ω~8Ω) (4Ω~8Ω)
CH 2 CH1
OUTPUT
TRS
BALANCED TIP=HOT
RING=COLD
SLEEVE=GND
XLR
BALANCED 3=COLD
1=GND
2=HOT
SAMSON TECHNOLOGIES CORP., HICKSVILLE, NEW YORK
TO PREVENT SHOCK DO
NOT OPEN. NO USER
SERVICABLE PARTS
INSIDE. REFER SERVICING
TO QUALIFIED SERVICE
PERSONNEL. TO PREVENT
FIRE OR SHOCK HAZARD
DO NOT EXPOSE TO RAIN
CAUTION
HEATSINKMAY BE
HOT!DO NOT BLOCK
AIRFLOWOR OVER-
HEATINGMAY OCCUR
RISKOF ELECTRIC SHOCK
DONOT OPEN
SERIAL
NUMBER
F
U
S
E
FUSE
FUSE RATING
12A/250V(115V)
6A/250V(230V)
CAUTION !
~ACINPUT
115V/230W,50/60HZ
510W(115V)900W (230V)
USE CLASS 2 WIRING MAXIMUM LOAD IMPEDANCE 4Ω
RIGHT LEFT
+RIGHT LEFT+
GROUND
OUTPUT 250W/4Ω
SERVO 550 STUDIO AMPLIFIER
RIGHT
LEFT
BRIDGED
MONO STEREO
INPUTS
(BALANCED
10KΩ/0dBm0)
TIP RING SLEEVE
TIP +
RING -
SLEEVE GND
PL 1602 16 CHANNEL LINE MIXER
SAMSON TECHNOLOGIES CORP., NEW YORK, U.S.A.
CAUTION
RISKOF ELECTRIC SHOCK
DONOT OPEN
!
120V - 60 Hz 35W
POWER
RATING
AVIS:
RISQUEDE CHOC ELECTRIQUE
NEPAS OUVRIR
DONOT EXPOSE THIS EQUIPMENT
TORAIN OR MOISTURE
ON
OFF
MIC 3MAIN OUT
BALANCED 600 +4db
TIP + RING - SLEEVE GND
AUX
RETURNS
UNBALANCED 10KΩ
1L
AUX SEND
UNBALANCED
2KΩ+4db
2R
1L2R3L4R5L6R7L8R9L10R11L12R13L14R15L16R
INPUTS BALANCED 10KΩ-30 to +4db TIP + RING - SLEEVE GND.
6R 5L 4R 3L 2R 1L
INSERTS TIP RETURN RING SEND
1
2
3
1
2
3
-40+4
0
-10
TRIM
-40+4
0
-10
TRIM
1L2R3L4RLRLR BUS
INSERTS
MIXER LINKING
110
POWER S / N
~115V(0.3A)
230V(0.15A)
50/60Hz 30W
MIC 1
XLR
PIN 1 GND
PIN 2 HOT
PIN 3 NEG
PHONE
TIP - POS
RING - NEG
SLEEVE - GND
SERIALNUMBER
MADEIN CHINA
CAUTION
RISKOF ELECTRIC SHOCK
DONOT OPEN.
_ mA SLOW BLOW FUSE FOR 115V
_ mA SLOW BLOW FUSE FOR 220V
CHANNEL 2
-10
+4
BALANCED
INPUT
BALANCED
OUTPUT
CHANNEL 1
LEVEL
-10
+4
KEY
INPUT OUTPUT
KEY
INPUT OUTPUT
LEVEL
BALANCED
INPUT
BALANCED
OUTPUT
S com Plus
1
2
3
1
2
3
1
2
3
1
2
3
XLR
PIN 1 GND
PIN 2 HOT
PIN 3 NEG
PHONE
TIP - POS
RING - NEG
SLEEVE - GND
SERIALNUMBER
MADEIN CHINA
CAUTION
RISKOF ELECTRIC SHOCK
DONOT OPEN.
_ mA SLOW BLOW FUSE FOR 115V
_ mA SLOW BLOW FUSE FOR 220V
CHANNEL 2
-10
+4
BALANCED
INPUT
BALANCED
OUTPUT
CHANNEL 1
LEVEL
-10
+4
KEY
INPUT OUTPUT
KEY
INPUT OUTPUT
LEVEL
BALANCED
INPUT
BALANCED
OUTPUT
S com Plus
1
2
3
1
2
3
1
2
3
1
2
3
XLR
PIN 1 GND
PIN 2 HOT
PIN 3 NEG
PHONE
TIP - POS
RING - NEG
SLEEVE - GND
SERIALNUMBER
MADEIN CHINA
CAUTION
RISKOF ELECTRIC SHOCK
DONOT OPEN.
_ mA SLOW BLOW FUSE FOR 115V
_ mA SLOW BLOW FUSE FOR 220V
CHANNEL 2
-10
+4
BALANCED
INPUT
BALANCED
OUTPUT
CHANNEL 1
LEVEL
-10
+4
KEY
INPUT OUTPUT
KEY
INPUT OUTPUT
LEVEL
BALANCED
INPUT
BALANCED
OUTPUT
S com Plus
1
2
3
1
2
3
1
2
3
1
2
3
ON
OFF
POWER
E30 2/3 OCTAVE STEREO 15 BAND GRAPHIC EQUALIZER
SAMSON
TECHNOLOGIES
CORP.,
NEW YORK, U.S.A.
INPUTS
OUTPUTS
BALANCED
<100KΩ0db
UNITYGAIN
SERIAL NUMBER
CAUTION
RISKOF ELECTRIC SHOCK
DONOT OPEN !
120V - 60 Hz 20W
POWER
RATING
AVIS: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR. DO NOT EXPOSE
THIS EQUIPMENT TO RAIN OR MOISTURE. BALANCED
10KΩ
BALANCED<100Ω
0dbUNITY GAIN BALANCED
0dbUNITY GAIN
BALANCED
0dbUNITY GAIN BALANCED
10KΩ
BALANCED
<100KΩ0db
UNITYGAIN
BALANCED<100Ω
0dbUNITY GAIN
115V/230V 50/60Hz13W
~AC INPUT
CHANNEL ACHANNEL BCHANNEL ACHANNEL B
MODE
STEREO
2 WAY
STEREO
3 WAY
MONO
4 WAY
CHANNEL
1 INPUT
CHANNEL
1 INPUT
MONO
INPUT
CH 1
LOW
OUTPUT
CH 1
LOW
OUTPUT
MONO
LOW
OUTPUT
CH 1
MID
OUTPUT
MONO
LOW-MID
OUTPUT
CH 1
HIGH
OUTPUT
CH 1
HIGH
OUTPUT
CH 2
INPUT
CH 2
INPUT
CH 2
LOW
OUTPUT
CH 2
LOW
OUTPUT
CH 2
MID
OUTPUT
MONO
HIGH-MID
OUTPUT
CH 2
HIGH
OUTPUT
CH 2
HIGH
OUTPUT
MONO
HIGH
OUTPUT
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
PL1602 Mixer
Servo 550 Power Amp (High)
S1500 Power Amp (Mid)
S2000 Power Amp
(Bridged Mono Low)
S•Com Plus
S•Com Plus
S•Com Plus
S•3 Way
E30 Dual 15 Band EQ
Left High / Mid
Right High / Mid
Mono
Sub
LIVE SOUND SYSTEM WITH MULTIBAND COMPRESSION
In this example, three S•com plus’ are inserted after the mixer, equalizer and crossover, there-
by providing individual compression on the low, mid and high frequencies.

17
S•com plus Connections
Tip (send)
Tip (return)
Sleeve (common)
Sleeve (common)
Tip (send)
Send (tip)
Return (ring)
Send (tip)
Return (ring)
Ring (return)
Sleeve (common)
Common Common
1
3
2
2
3
1
Hot
Cold Female XLR
Male XLR
Hot (2)
Cold (3)
Common (1)Common
Hot
Cold
Hot (2)
Cold (3)
Common (1) Common
Solder Points End View
End View Solder Points
12
3
21
3
Unbalanced 1/4”Connector
Insert Cable 1/4”male TRS connector to two male 1/4”
in send and return configuration.
XLR Balanced Wiring Guide
CONNECTING THE S•com plus
The are several ways to interface the S•com plus to support a variety of applications. The S•com plus features
servo-balanced inputs and outputs, so connecting balanced and unbalanced signals is possible without any sig-
nal loss. The S•com plus can be used on a single instrument by connecting to a channel’s insert points, or on an
entire mix "in-line" between a mixer’s outputs and a power amp or equalizer.
INSERT POINTS
Many mixers today provide channel and bus or group inserts. Insert points are input and output patch points that
interrupt the channel or bus signal so that external processors can be connected. Channel insert points are ideal
for connecting to when using the S•com plus to process a single channel like a vocal, bass or guitar. Bus insert
points are ideal for compressing groups of instruments like vocals, strings or drums. If you are connecting to a
channel’s insert points, you may have a single TRS jack for Send & Return. In this case, use an Insert "Y" Cable
that configured like the one in the wiring diagram below.
Tip (signal)Signal Signal
Sleeve (ground)
Ground Ground
Tip (signal
)
Signal (tip)
Signal (ring)
Signal (tip)
Signal (ring)
Ring (signal)
Sleeve (ground)
Ground Ground
IN-LINE
In live sound operation the S•com plus can be installed in-line between a mixer and equalizer or power amplifier.
For these applications the S•com plus provides both 1/4" TRS connectors and XLR connectors to easily interface
with most any professional audio device. Follow the wiring examples below for your particular installation.
Balanced TRS 1/4”Connector
ENGLISH

60
Specifications
System Specifications
Frequency Response <10Hz to 20kHz +0 / -0.1 dB effect out, -0.4 @ 100kHz,
<10Hz to 20kHz +0 / -0.1 dB effect in, -3dB @ >100kHz
Dynamic range 116 dB, un-weighted, 22 Hz to 22 kHz
THD 0.008 % typ. @ +4 dBu, 1 kHz Effect out, 0.016% effect in
Crosstalk >100dB, 22 Hz to 22 kHz
Operating Level Selectable +4dBu / -10 dBV
Max. Input Level +21dBu, balanced
CMRR Min. 40dB, >50dB @ 1kHz
Max. Output Level +21dBu, balanced
Balanced Input
Connectors XLR and 1/4" TRS jack
Impedance >20K Ohms balanced or unbalanced
Balanced Output
Connectors XLR and 1/4" TRS jack
Impedance 60 Ohms balanced or unbalanced
Key Input
Connector 1/4" jack
Impedance 10 k Ohm
Max. Input Level +21 dBu
Key Output
Connector 1/4" jack
Impedance 47 Ohms
Max. Output Level +21 dBu
Expander/Gate
Trigger range Variable (Off to +10 dB)
Attack <1 ms per 50 dB
Release Variable (Slow:100 ms / 1dB, Fast:100 ms / 100 dB)
Ratio Expander 1:2, Gate 1:16
Compressor Section
Detector RMS
Threshold -40 dB to +20 dB
Ratio Variable (1:1 to infinity : 1)
Manual Attack Time Variable (0.3 ms / 20 dB to 300 ms / 20dB)
Manual Release Time Variable (0.05 to 5 Sec)
Output gain Variable (-20 to +20 dB)
Peak Limiter Section
Threshold Variable 0 to Off
Ratio Preset
Limiter Ceiling type
Attack <5 ms
Release Typ. 20dB/s
De-Esser
Trigger range variable (off to 12dB)
Maximum 12dB Gain Reduction mid / high band

61
Function Switches
Gate Gate or Expander
Release Fast/slow
Enhancer In/Out
In/Out Bypass
Key Switches the detector section to external key input
Auto Sets automatic attack and release times and automated timing - program dependent
I/O Meter Switches the Input/Output meter to read input or output level
De-Esser In/Out
Stereo Link Links both channels for stereo operation. Channel 1 becomes master.
Operating Level (Rear Panel) Changes the internal reference level from +4dBu to -10dBV
Meters & LED's
Gain Reduction 12 segment LED display
30 / 27 / 24 / 21 / 18 / 15 / 12 / 9 / 6 / 4 / 2 / 1dB
Input/Output level 12 segment LED display:
-30 / -24 / -18 / -12 / -6 / -3 / 0 / +3 / +6 / +9 / +12 / +18dB
Expander/Gate Threshold 2 LED's Gate open, Gate closed
Peak Limiter Threshold 1 LED for Indication of Limiter function
Function switch LED indicator in each (except 0perating Level Switch)
Power Supply
Mains Voltages USA/Canada 105 - 125 VAC ~, 60 Hz
Mains Voltages Europe 215 - 254 VAC~,50 / 60Hz
Power Consumption 10 Watts
Power inlet Standard IEC receptacle/with fuse
Physical
Dimensions 1 3/4 (44.5 mm) x 19 (482.6 mm) x 7 3/4 (197 mm)
Net Weight 5lbs., (2.3 kg)
Shipping Weight 7.5lbs., (3.4 kg)
Specifications

PIN 1 PIN 2 PIN 3
GND HOT COLD
TIP RING SLEEVE
HOT COLD GND
XLR
1/4"
CONNECTIONS
COMPRESSOR
STEREO LINK
VCA DC Control
DE-ESSER
IN
OUT
DBPF
VCA
COMPARATOR
INPUT
METER
SOURCE
BYPASS
OUT
IN
FULL WAVE
RECTIFIER
I/O LEVEL
METER
OUTPUT
LEVEL
KEY
OUTPUT
INTERNAL
KEY
SOURCE
RMS to DC
CONVERTER EXPANDER / GATE
DE-ESSER
METER
ENHANCER
COMPRESSOR CONTROL GATE CONTROL
LIMITER
LIMITER DC CONTROL
+4dBu
or
-10dBv
OUTPUT
+4dBu
or
-10dBv
OUTPUT
INPUT
GAIN REDUCTION
METER
EXTERNAL
KEY INPUT
EXTERNAL
STEREO
LINK
IN OUT
ENHANCER
FILTER
I/O LEVEL
+4dBu
I/O LEVEL
-10dBv +4dBu
-10dBv
CHANNEL 2 IS IDENTICAL TO CHANNEL 1 EXCEPT FOR STEREO LINK MODE
ENHANCER, LIMITER, AND OUTPUTS ARE CONTROLLED BY CHANNEL 1 IN STEREO LINK MODE
Block Diagram
62