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Have any Questions? +49 2382 7087 0
sales@4-acoustic.com
SQ-Amplifier
Quick Link

SQ-Series Powerful | Reliable | Affordable

Get ready to experience the incredible power amplification of our state-of-the-art Class H design!

The SQ-series offers an amazingly wide range of very cost-efficient, flexible amplifier performance! From 2x900@4Ohm up to 4x1200@4Ohm, seven different models are available for your choice! The Class H output stage is powered by an oversized analog power supply with a strong toroidal transformer, ensuring stable performance even under weak or unstable mains supplies. The front panel is equipped with a power switch and several LEDs to display the working status, making it easy to monitor the amplifier's status.

SQ-1200 GS1 (EAN) CODE: 4260318511940
SQ-1600 GS1 (EAN) CODE: 4260318511957
SQ-2000 GS1 (EAN) CODE: 4260318511964
SQ-2400 GS1 (EAN) CODE: 4260318511971

SQ-1604 GS1 (EAN) CODE: 4260318511988
SQ-2404 GS1 (EAN) CODE: 4260318511995
SQ-3204 GS1 (EAN) CODE: 4260318512015

SQ | 1200 | 1600 | 2000 | 2400

Technical Details

Model Name SQ-1200 SQ-1600 SQ-2000 SQ-2400
GS1 (EAN) CODE 4260318511940 4260318511957 4260318511964 4260318511971
System Type 2-Channel Class H 2-Channel Class H 2-Channel Class H 2-Channel Class H
Output Power
all channels driven
20Hz - 20 kHz, 0.1 % THD		 2 x 1200W @ 2Ohm
2 x 900W @ 4Ohm
2 x 600W @ 8Ohm		 2 x 1600W @ 2Ohm
2 x 1200W @ 4Ohm
2 x 800W @ 8Ohm		 2 x 2000W @ 2Ohm
2 x 1500W @ 4Ohm
2 x 1000W @ 8Ohm		 2 x 2400W @ 2Ohm
2 x 1800W @ 4Ohm
2 x 1200W @ 8Ohm
Output Power
Bridge mode		 1 x 2400W @ 4Ohm
1 x 1800W @ 8Ohm
1 x 1200W @16Ohm		 1 x 3200W @ 4Ohm
1 x 2400W @ 8Ohm
1 x 1600W @16Ohm		 1 x 4000W @ 4Ohm
1 x 3000W @ 8Ohm
1 x 2000W @16Ohm		 1 x 4800W @ 4Ohm
1 x 3600W @ 8Ohm
1 x 2400W @16Ohm
THD+N ≤0.5% @ 8Ω 1kHz ≤0.5% @ 8Ω 1kHz ≤0.5% @ 8Ω 1kHz ≤0.5% @ 8Ω 1kHz
Slew Rate >26V/μs >26V/μs >26V/μs >26V/μs
Frequency Response
@1Watt, 8Ohm		 10Hz - 20KHz / ±0.3dB 10Hz - 20KHz / ±0.3dB 10Hz - 20KHz / ±0.3dB 10Hz - 20KHz / ±0.3dB
Damping Factor
(1kHz and below)		 >3000 @100Hz >3000 @100Hz >3000 @100Hz >3000 @100Hz
Signal to Noise Ratio
20Hz -20 kHz		 >100dB >100dBA >100dBA >100dBA
Channel Separation
Crosstalk@1kHz		 >70dB >70dB >70dB >70dB
Voltage Gain 39dB (0,775V:69.5V) 40.3dB (0,775V:80.5V) 41.3dB (0,775V:89.5V) 42dB (0,775V:98V)
Input Sensitivity selectable 0.775V/1V/1.4V selectable 0.775V/1V/1.4V selectable 0.775V/1V/1.4V selectable 0.775V/1V/1.4V
Input Impedance 20k Ohm Balanced,
10k Ohm Unbalanced		 20k Ohm Balanced,
10k Ohm Unbalanced		 20k Ohm Balanced,
10k Ohm Unbalanced		 20k Ohm Balanced,
10k Ohm Unbalanced
Front Control Power switch, Gain 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		 Sensitivity Switch,
Mode Switch
LED Indicators Signal, Clip, Protect,
Power, Bridge		 Signal, Clip, Protect,
Power, Bridge		 Signal, Clip, Protect,
Power, Bridge		 Signal, Clip, Protect,
Power, Bridge
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-		 XLR Active balanced
pin1 gnd / pin 2+ / pin3-
Output Connectors 2 NL4 Sockets, 2xBinding Posts 2 NL4 Sockets, 2xBinding Posts 2 NL4 Sockets, 2xBinding Posts 2 NL4 Sockets, 2xBinding Posts
Cooling Low Noise Continuously
Variable speed fan		 Low Noise Continuously
Variable speed fan		 Low Noise Continuously
Variable speed fan		 Low Noise 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		 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		 On/Off muting, DC fault
power Supply shutdown
Operating Voltage 230V (+/- 10%), 50-60Hz
USA Version 110V (+/- 10%), 50-60Hz		 230V (+/- 10%), 50-60Hz
USA Version 110V (+/- 10%), 50-60Hz		 230V (+/- 10%), 50-60Hz
USA Version 110V (+/- 10%), 50-60Hz		 230V (+/- 10%), 50-60Hz
USA Version 110V (+/- 10%), 50-60Hz
Fuse T-15A T-20A T-20A T-25A
Idle
Power Consumption		 < 38W < 38W < 40W < 42W
Max.
Power Consumption		 < 980W < 1400W < 2100W <3000W
Dimensions (h/w/d) 19“/2U 483mm×486mm×90mm 19“/2U 483mm×486mm×90mm 19“/2U 483mm×486mm×90mm 19“/2U 483mm×486mm×90mm
Net weight 24,5 kg 25,5 kg 26,5 kg 27,5 kg

SQ | 1604 | 2404 | 3204

Technical Details

Model Name SQ-1604 SQ-2404 SQ-3204
GS1 (EAN) CODE 4260318511988 4260318511995 4260318512015
System Type 4-Channel Class H 4-Channel Class H 4-Channel Class H
Output Power
all channels driven
20Hz - 20 kHz, 0.1 % THD		 4 x 600W @ 4Ohm
4 x 400W @ 8Ohm		 4 x 900W @ 4Ohm
4 x 600W @ 8Ohm		 4 x 1200W @ 4Ohm
4 x 800W @ 8Ohm
Output Power
Bridge mode		 2 x 1600W @ 4Ohm
2 x 1200W @ 8Ohm
2 x 800W @16Ohm		 2 x 2400W @ 4Ohm
2 x 1800W @ 8Ohm
2 x 1200W @16Ohm		 2 x 3200W @ 4Ohm
2 x 2400W @ 8Ohm
2 x 1600W @16Ohm
THD+N ≤0.5% @ 8Ω 1kHz ≤0.5% @ 8Ω 1kHz ≤0.5% @ 8Ω 1kHz
Slew Rate >28V/μs >28V/μs >28V/μs
Frequency Response
@1Watt, 8Ohm		 10Hz - 20KHz / ±0.4dB 10Hz - 20KHz / ±0.4dB 10Hz - 20KHz / ±0.4dB
Damping Factor
(1kHz and below)		 >3000 @100Hz >3000 @100Hz >3000 @100Hz
Signal to Noise Ratio
20Hz -20 kHz		 >100dB >100dB >100dB
Channel Separation
Crosstalk@1kHz		 >70dB >70dB >70dB
Voltage Gain 36dB (0,775V:49V) 39dB (0,775V:69.5V) 40.3dB (0,775V:80.5V))
Input Sensitivity selectable 0.775V/1V/1.4V selectable 0.775V/1V/1.4V selectable 0.775V/1V/1.4V
Input Impedance 20k Ohm Balanced,
10k Ohm Unbalanced		 20k Ohm Balanced,
10k Ohm Unbalanced		 20k Ohm Balanced,
10k 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, Clip, Protect,
Power, Bridge		 Signal, Clip, Protect,
Power, Bridge		 Signal, Clip, Protect,
Power, Bridge
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 4 NL4 Sockets, 4xBinding Posts 4 NL4 Sockets, 4xBinding Posts 4 NL4 Sockets, 4xBinding Posts
Cooling Low Noise Continuously
Variable speed fan		 Low Noise Continuously
Variable speed fan		 Low Noise 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 230V (+/- 10%), 50-60Hz
USA Version 110V (+/- 10%), 50-60Hz		 230V (+/- 10%), 50-60Hz
USA Version 110V (+/- 10%), 50-60Hz		 230V (+/- 10%), 50-60Hz
USA Version 110V (+/- 10%), 50-60Hz
Fuse T-15A T-20A T-25A
Idle
Power Consumption		 < 30W < 30W < 40W
Max.
Power Consumption		 < 1200W < 2000W < 3000W
Dimensions (h/w/d) 19“/2U 483mm×492mm×90mm 19“/2U 483mm×492mm×90mm 19“/2U 483mm×492mm×90mm
Net weight 22 kg 25 kg 27 kg

Picture Gallery

SQ | 1200 | 1600 | 2000 | 2400

SQ | 1604 | 2404 | 3204

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

Downloads

Documents
SQ-Series Amplifier Catalogue

  

SQ-Series Amplifier Operation manual
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