Samsom S-com, S-com plus, S-curve 231, and S-phone.



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Samson S-com  Specifications

Samson S-com Dual Channel Compressor Limiter

Samson S-com Plus Specifications

Samson S-com Plus Compressor Limiter + Gate

Samson S-curve 231 Specifications

Samson S-curve 231 Dual Channel Graphic Equaliser

Samson S-phone 4 Channel Headphone Amplifier

Samson S - phone 4 Channel Headphone Amplifier


Samson S com Dual Channel Compressor Limiter


The S com is a dual-channel, single rack space stereo compressor designed to control signal levels in a variety of applications. S com's logical design and layout make it simple to understand and easy to use. Its sonic integrity offers clean, distortion free audio, and a predictable, usable range of control from undetectable to clearly identifiable.


Each channel combines an Expander/Gate, a Compressor/Limiter and a fully adjustable Enhancer. This unique circuit reduces noise, increases loudness and recovers high frequencies that might otherwise be compromised when audio is heavily compressed. The Spectra switch adds a mid-band boost to the detector circuit to help smooth out harsh vocals.


The Expander/Gate features a variable Threshold control and switchable (fast/slow) Release time. The Gate's operation is easily visible with twin (open and closed) LEDs. The S com's Compressor/Limiter controls include Threshold, Ratio, Attack, Release, and Output. The Auto function continuously analyzes the audio input, and automatically adjusts the attack and release parameters based on the changing level. A Key input and Key Listen feature provides for external triggering, or EQ, of dynamically processed signals.


    Compressor/Limiter, Expander/Gate with Enhancer
    Advanced Circuit Design Utilizing Low Noise Operational Amplifiers and High Quality VCA's
    Enhancer Circuit with Independent Control
    12 Segment LED Meters for Input/Output and Gain Reduction
    Expander/Gate with Variable Trigger Control and Switchable
    Fast/Slow Release
    Servo Balanced Inputs and Outputs on XLR and 1/4" Connectors
    SKD (Smart Knee Detector) Circuit Switches from Soft to Hard
    Knee Based on the Level of Input Signal Applied
    AEG (Auto Envelope Generator) Mode Constantly Adjusts the Compressors Attack and Release Times

Samson S-com Plus  Dual Compressor Limiter + Gate


The S com plus is a highly adaptable stereo compressor/limiter in an efficient single rackspace design. It is intended for situations where extra flexibility is required to optimize signal levels. It delivers essential control along with simplicity of operation. S com plus's comprehensive and wide-ranging controls provide extensive manipulation of audio dynamics, even in the most complex situations.


Each channel features a wide range of variable control. A feature-rich Compressor section includes variable Threshold, Ratio, Attack and Release controls. Samson's SKD (Smart Knee Detector) circuit dynamically adjusts the compression curve to ensure a musical result. Our exclusive AEG (Auto Envelope Generator) function simplifies optimum settings by constantly analyzing the audio input and automatically adjusting the attack and release parameters based on the changing level. Key Inputs and Outputs are included for externally processing the control voltage.


The Expander/Gate features a variable threshold level and switchable release time (fast or slow). The Gate switch changes the downward expander ratio from "light" to "hard" gating for control ranging from subtle to an obvious effect. A dedicated Peak/Limiter with variable control provides protection against peak and overload independently of the compressor. When used in combination with the Compressor the Peak/Limiter offers even more precise control over dynamic levels.


A functional De-esser improves audio quality by removing "S" from vocals and sibilance from overly bright signal sources such as cymbals. The Enhancer switch engages the EFR (Enhanced Frequency Recovery) circuit, which restores high frequencies that are sometimes diminished by heavy compression. Extensive metering includes Input/Output, Gain Reduction, De-esser Level, Gate Open/Close and Limit. Other S com plus features

    Compressor/Limiter, Expander/Gate, De-Esser with Peak Limiter
    Expander/Gate with Variable Trigger Control and Switchable Fast/Slow Release
    Peak Limiter with Independent Threshold Control and Peak LED
    Adjustable De-Esser with independent LED Meter for Reducing Sibilance
    Advanced Circuit Design Utilizing Low Noise Operational
    Amplifiers and High Quality VCA's
    Servo Balanced Inputs and Outputs on XLR and 1/4" Connectors
    SKD (Smart Knee Detector) Circuit Switches from Soft to Hard Knee Based on the Level of Input Signal Applied
    AEG (Auto Envelope Generator) Mode Constantly Adjusts the Compressors Attack and Release Times


Samson S Curve 231 Dual 31 band Graphic Equaliser


The S•Curve 231 is a professional quality equalizer that gives you precise tonal control over a stereo, or two mono audio signals. Center detented sliders with LED illumination allow you to selectively cut or boost selected frequency areas by as much as 12 dB. Front panel controls include output level sliders, a variable Lowcut filter, as well as Cut Only, Range and Bypass switches.

The rear panel provides electronically balanced inputs and outputs on ¼-inch and XLR connectors.  Thanks to low noise circuitry, the S•Curve 231 can be used in a wide variety of applications, including live performance (in conjunction with either Front Of House or monitor mixers), in broadcast environments, or for recording.



The S•Curve 231 is a two channel equalizer. Each channel provides 31 bands of equalization, with each frequency band representing 1/3 of an octave in the 20 Hz to 20 kHz range.

Constant Q circuitry ensures that the bandwidth of the selected frequency area stays the same even when approaching maximum boost or attenuation. As a result, phase shifting and intermodulation distortion is greatly reduced, making for pristine sound.

The S•Curve 231 can be set for either 6 or 12 dB of gain and attenuation for each of the frequency bands.

For monitor applications, the S curve 231 can be set for CUT ONLY mode providing up to 12dB of attenuation with full slider range.

Ultra-low noise circuitry ensures superb audio fidelity.

Variable Low Cut Filter for removing rumble and floor noise can be adjusted from 15 to 200 Hz.

Electronically balanced XLR and TRS inputs and outputs.

Front panel, hard-wired, relay controlled Bypass switches (with dedicated Bypass LEDs) allow the equalization circuitryand output level control to be activated or deactivated.Main Level control enables output signal to be attenuated or boosted for optimum signal-to noise ratio. LED faders and 8 segment LED bar VU meters.Relay power-on circuitry prevents speaker “thumps” when the unit is turned on.Internal power supply ensures reliability and trouble-free operation.Standard 19”, 2 rack-space design for easy integration into any travelling or fixed installation audio system. All-steel chassis makes the S•Curve 231 eminently road-worthy.



Centre frequencies (Hz) .................... 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1 k, 1.25 k, 1.6 k, 2 k, 2.5 k, 3.15 k, 4 k, 5 k, 6.3 k, 8 k, 10 k, 12.5 k, 16 k, 20 k

Variable range ............................ ±6 dB or ±12 dB

Signal Input Connectors ............. XLR and ¼” TRS jack

Impedance ........................        .20k Ohm balanced, 10k Ohm


Signal Output Connectors ....... XLR and ¼” jack

Impedance ........................       60 Ohms balanced, 30 Ohms


Frequency response (unity) ....... <10 Hz to 70 kHz -3 dB

THD+N, unity gain ...................... Less than 0.013% (20Hz

to 20kHz)

Main level Max. gain ........................ +6 dB

Low cut filter ................................... variable, 15 to 200 Hz

Noise (with 22 kHz LPF, all faders flat) ....... -85 dB

Cut Only mode .................................. -12 dB ± 1 dB Max

Power Supply Mains Voltages/selectable

USA/Canada ....................... ~120 V AC, 60 Hz

U.K./Australia ..................... ~240 V AC, 50 Hz

Europe ............................... ~230 V AC, 50 Hz

Dimensions (W x D x H) .................... 19” x 10” x 3.5” 482mm x 254mm x 89mm Weight ............................................ 5.1 lb.(2.31 kg)



Samson  S-phone - Four Channel Headphone Amplifier

The S phone is a versatile single rack space four channel headphone amplifier, loaded with advanced features that provide tremendous flexibility for monitor and cue mixing. The Master Input features an input level and LED meter to control and display the overall stereo input.

Each of S phone's four channels includes three Headphone Outputs with an overall Volume control and individual Level meters. A convenient Stereo Auxiliary input is available on each channel so that individual line signals from direct or buss outputs can be mixed with the main stereo input. The Balance control adjusts the ratio of the Main and Auxiliary signal or the left to right balance (based on the setting of the ST/2CH switch) so that each headphone mix can be further tailored for a particular listener's individual needs ("More Me").

For greater sonic control, S phone also features a 2-band equalizer on each of the four channels. A master Stereo Aux input on the front panel is also supplied for inserting a second signal to all headphones.

    Four Channel Headphone Mixer/Amplifier
    Two Master Stereo Inputs plus Stereo Link Output
    8 Segment LED Metering on Each Channel and Master
    Two Band Equalizer on Each Channel
    Three Headphone Outputs per Channel (One Front Panel and Two Rear Panel Outputs)
    Auxiliary Input with Balance Control provides four Channels of "More Me" Mixing
    Mute and Stereo/2 Channel Mode Switches on Each Channel
    Maximum Output Power on Each Channel (Regardless of Headphone Impedance)


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