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Cybersteel Inc.
376-293 City Road, Suite 600
San Francisco, CA 94102

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EN
Have any Questions? +49 2382 7087 0

ST-Amplifier

ST-Series High stability Class D amplifier

High stability Class D amplifier

The ST series is our new amplifier series which offers a very efficient and stable operation. The housing is a 2U 19“ metal case. This state of art amplifier design satisfies with a transparent sound, a high dynamic range and low distortions. They are suitable for subwoofers and full range speakers as well as line array setups. The innovative cooling system with automatic, speed controlled, low noise fans, offers a perfect cooling of all components. An integrated Clip Limiter protects the amplifier and speaker from unwanted clipping distortions. Female input XLR sockets are active balanced and have a link through to a male socket. The output section contains Neutrik NL4 sockets and binding posts for the 2CH Models.

ST-4200 GS1 (EAN) CODE: 4260318511469

ST-4400 GS1 (EAN) CODE: 4260318511476

ST-6400 GS1 (EAN) CODE: 4260318511483

Technical Details

Model Name ST-4200 ST-4400 ST-6400
GS1 (EAN) CODE 4260318511469 4260318511476 4260318511483
System Type 2-Channel Class D Amplifier 4-Channel Class D Amplifier 4-Channel Class D Amplifier
Output Power
all channels driven
20Hz - 20 kHz, 0.1 % THD
2 x 4000W @ 2Ohm
2 x 3000W @ 4Ohm
2 x 2000W @ 8Ohm
4 x 2000W @ 2Ohm
4 x 1500W @ 4Ohm
4 x 1000W @ 8Ohm
4 x 3000W @ 2Ohm
4 x 2250W @ 4Ohm
4 x 1500W @ 8Ohm
Output Power
Bridge mode
2 x 8000W @ 4Ohm
2 x 6000W @ 8Ohm
2 x 4000W @ 4Ohm
2 x 3000W @ 8Ohm
2 x 6000W @ 4Ohm
2 x 4500W @ 8Ohm
THD+N @ 8Ω 1kHz,1dB ≤0.06% ≤0.06% ≤0.06%
Slew Rate >60v/μs >60v/μs >60v/μs
Frequency Response
@1Watt, 8Ohm
10Hz -34kHz / ±0.3dB 10Hz -34kHz / ±0.3dB 10Hz -34kHz / ±0.3dB
Damping Factor
(1kHz and below)
>450:1 >450:1 >450:1
Signal to Noise Ratio
20Hz -20 kHz
>100dBA >100dBA >100dBA
Channel Separation
Crosstalk@1kHz
>70dB >70dB >70dB
Voltage Gain 46dB (0,775V:153V) 43dB (0,775V:108V) 45dB (0,775V:134V)
Input Sensitivity selectable 0.775V/1V/1.5V/2V selectable 0.775V/1V/1.5V/2V selectable 0.775V/1V/1.5V/2V
Input Impedance 30k Ohm Balanced
15k Ohm Unbalanced
30k Ohm Balanced
15k Ohm Unbalanced
30k Ohm Balanced
15k Ohm Unbalanced
Front Control Power switch, Gain control Power switch, Gain control Power switch, Gain control
Rear Control Sensitivity Switch,
Mode Switch
Sensitivity Switch,
Mode Switch
Sensitivity Switch,
Mode Switch
LED Indicators Signal -30dB / -10dB, green
Signal -4dB, yellow
Clip, orange
Protect, red
power, green
Bridge, yellow
Signal -30dB / -10dB, green
Signal -4dB, yellow
Clip, orange
Protect, red
power, green
Bridge, yellow
Signal -30dB / -10dB, green
Signal -4dB, yellow
Clip, orange
Protect, red
power, green
Bridge, yellow
Input Connectors XLR Active balanced
pin1 gnd / pin 2+ / pin3-
XLR Active balanced
pin1 gnd / pin 2+ / pin3-
XLR Active balanced
pin1 gnd / pin 2+ / pin3-
Output Connectors 2 Neutrik NL4 Sockets
2 Binding Posts
4 Neutrik NL4 Sockets 4 Neutrik NL4 Sockets
Cooling Continuously Variable
speed fan
Continuously Variable
speed fan
Continuously Variable
speed fan
Protection Full short circuit, Open circuit,
thermal, Ultrasonic, RF Protection.
Stable Into reactive or
Mismatched loads
Full short circuit, Open circuit,
thermal, Ultrasonic, RF Protection.
Stable Into reactive or
Mismatched loads
Full short circuit, Open circuit,
thermal, Ultrasonic, RF Protection.
Stable Into reactive or
Mismatched loads
Load Protection On/Off muting
DC fault power
Supply shutdown
On/Off muting
DC fault power
Supply shutdown
On/Off muting
DC fault power
Supply shutdown
Operating Voltage 220V (+/- 10%) 50-60Hz 220V (+/- 10%) 50-60Hz 220V (+/- 10%) 50-60Hz
Fuse T-25A T-20A T-25A
Dimensions (h/w/d) 19“/2U 483W x 451D x 88H 19“/2U 483W x 470D x 88H 19“/2U 483W x 470D x 88H
Net weight 22,5 kg 23,0 kg 25,5 kg

Picture Gallery

Accessories

Order Code GS1 (EAN) Code Description
KA-SP4-0.5 4260318511155 0,5 Meter speaker cable 4x2,5qmm
KA-SP4-05 4260318511193 5 Meter Speaker cable 4x2,5qmm
KA-SP4-10 4260318511209 10 Meter Speaker cable 4x2,5qmm
KA-SP4-15 4260318511216 15 Meter Speaker cable 4x2,5qmm
KA-SP4-20 4260318511223 20 Meter Speaker cable 4x2,5qmm
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