SX Series Power Amplifiers
The SX Series Class D Power Amplifiers
Even under demanding touring and stage conditions, it remains reliable, delivering powerful output to your speakers while minimising distortion. Thanks to its ultra-quiet, temperature-controlled fans, this state-of-the-art amplifier series is ideal for touring and permanent installations alike. With an output of up to 4 x 4,600 watts or 2 x 9,000 watts at 2 ohms, the SX series provides ample power for even the largest subwoofer clusters. The digitally controlled SMPS power supply ensures stable operation and high efficiency, even with weak or unstable mains power. The compact chassis is 402 mm deep, 1U high and weighs just 8.4 kg (12 kg). All connectors are genuine Neutrik plugs: Powercon for the power input, NL4 Speakon for the speaker outputs and XLR for the input signals. DIP switches on the rear panel allow the operating mode and input sensitivity to be selected. The front panel features a power switch, volume control and multifunctional LED rings.
Overview of 2-channel devices
| Model | SX-21800 | SX-25000 | SX-27000 | SX-29000 |
| System Type | 2-Channel Class D amplifier |
2-Channel Class D amplifier |
2-Channel Class D amplifier |
2-Channel Class D amplifier |
| Output power | 2 x 2200W @ 2Ohm 2 x 1500W @ 4Ohm 2 x 900W @ 8Ohm |
2 x 6000W @ 2Ohm 2 x 4300W @ 4Ohm 2 x 2600W @ 8Ohm |
2 x 7600W @ 2Ohm 2 x 6500W @ 4Ohm 2 x 3500W @ 8Ohm |
2 x 9000W @ 2Ohm 2 x 8400W @ 4Ohm 2 x 4500W @ 8Ohm |
| Dimensions | 19“/1U 483W x 420D x 44H |
19“/1U 483W x 420D x 44H |
19“/1U 483W x 486D x 44H |
19“/1U 483W x 486D x 44H |
| Net Weight | 7,0 kg | 8,4 kg | 12,0 kg | 12,0 kg |
Overview of 4-channel devices
| Model | SX-43500 | SX-44000 | SX-46000 | SX-48000 |
| System Type | 4-Channel Class D amplifier |
4-Channel Class D amplifier |
4-Channel Class D amplifier |
4-Channel Class D amplifier |
| Output power | 4 x 2200W @ 2Ohm 4 x 1500W @ 4Ohm 4 x 900W @ 8Ohm |
4 x 2700W @ 2Ohm 4 x 1830W @ 4Ohm 4 x 1100W @ 8Ohm |
4 x 3800W @ 2Ohm 4 x 2700W @ 4Ohm 4 x 1600W @ 8Ohm |
4 x 4600W @ 2Ohm 4 x 3650W @ 4Ohm 4 x 2000W @ 8Ohm |
| Dimensions | 19“/1U 483W x 420D x 44H |
19“/1U 483W x 420D x 44H |
19“/1U 483W x 486D x 44H |
19“/1U 483W x 486D x 44H |
| Net Weight | 8,0 kg | 8,2 kg | 8,4 kg | 12,0 kg |
Technical Specifications
for Two-Channel Devices
| Model | SX-21800 | SX-25000 | SX-27000 | SX-29000 |
| GS1 (EAN) CODE | 4260318513333 | 4260318511858 | 4260318512992 | 4260318513005 |
| System Type | 2-Channel Class D amplifier |
2-Channel Class D amplifier |
2-Channel Class D amplifier |
2-Channel Class D amplifier |
| Output power | 2 x 2200W @ 2Ohm 2 x 1500W @ 4Ohm 2 x 9000W @ 8Ohm |
2 x 6000W @ 2Ohm 2 x 4300W @ 4Ohm 2 x 2600W @ 8Ohm |
2 x 7600W @ 2Ohm 2 x 6500W @ 4Ohm 2 x 3500W @ 8Ohm |
2 x 9000W @ 2Ohm 2 x 8400W @ 4Ohm 2 x 4500W @ 8Ohm |
| Output Power (Bridge Mode) | 1 x 4000W @ 4Ohm 1 x 3000W @ 8Ohm 1 x 1800W @16Ohm |
1 x 1600W @ 4Ohm 1 x 1300W @ 8Ohm 1 x 7000W @16Ohm |
1 x 1800W @ 4Ohm 1 x 1680W @ 8Ohm 1 x 9000W @16Ohm |
|
| THD+N @ 8Ω 1kHz,1dB | ≤0.05% | ≤0.05% | ≤0.05% | ≤0.05% |
| Slew Rate | >30v/μs | >30v/μs | >30v/μs | >30v/μs |
| Frequency Response @1Watt, 8Ohm |
10Hz - 20kHz ±0.35dB |
10Hz - 20kHz ±0.35dB |
10Hz - 20kHz ±0.35dB |
10Hz - 20kHz ±0.35dB |
| Damping Factor (@100Hz) |
>3000 | >3000 | >3000 | >3000 |
| Signal to Noise Ratio 20Hz -20 kHz |
99dB | 99dB | 99dB | 99dB |
| Channel Separation Crosstalk@1kHz |
>70dB | >70dB | >70dB | >70dB |
| Voltage Gain | 40.8dB (0,775V:85V) | 45.4dB (0,775V:144V) | 46.7dB (0,775V:168V) | 47.6dB (0,775V:186V) |
| Input Sensitivity | 0.775V/1V/1.4V/2V | 0.775V/1V/1.4V/2V | 0.775V/1V/1.4V/2V | 0.775V/1V/1.4V/2V |
| 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 |
| Frontpanel Controls | Power switch, volume control | Power switch, volume control | Power switch, volume control | Power switch, volume control |
| Backpanel Controls | Sensitivity switch, Mode switch |
Sensitivity switch, Mode switch |
Sensitivity switch, Mode switch |
Sensitivity switch, Mode switch |
| LED Indicators | Signal VU meter Protect display, Parallel mode display |
Signal VU meter Protect display, Parallel mode display |
Signal VU meter Protect display, Parallel mode display |
Signal VU meter Protect display, Parallel mode display |
| Input Connectors | XLR electronically balanced Pin 1 GND Pin 2+ Pin 3- |
XLR electronically balanced Pin 1 GND Pin 2+ Pin 3- |
XLR electronically balanced Pin 1 GND Pin 2+ Pin 3- |
XLR electronically balanced Pin 1 GND Pin 2+ Pin 3- |
| Output Connectors | 2 Neutrik NL4 Sockets 2 terminal blocks |
2 Neutrik NL4 Sockets 2 terminal blocks |
2 Neutrik NL4-Sockets | 2 Neutrik NL4-Sockets |
| Cooling | Ultra Quiet fan | Ultra Quiet fan | Ultra Quiet fan | Ultra Quiet fan |
| Protection | Complete short circuit, Open circuit, Thermal, Ultrasonic, HF protection Stable with reactive or unmatched loads |
Complete short circuit, Open circuit, Thermal, Ultrasonic, HF protection Stable with reactive or unmatched loads |
Complete short circuit, Open circuit, Thermal, Ultrasonic, HF protection Stable with reactive or unmatched loads |
Complete short circuit, Open circuit, Thermal, Ultrasonic, HF protection Stable with reactive or unmatched loads |
| Load Protection | Mute On/Off DC fault current Power shutdown |
Mute On/Off DC fault current Power shutdown |
Mute On/Off DC fault current Power shutdown |
Mute On/Off DC fault current Power shutdown |
| Operating Voltage | 230V (+/- 10%), 50-60Hz USA Version 110V (+/- 10%), 50-60Hz |
230V (+/- 10%), 50-60Hz USA Version 110V (+/- 10%), 50-60Hz |
PFC 100V-240V 50-60Hz |
PFC 100V-240V 50-60Hz |
| Idle Power Consumption |
< 80W | < 165W | < 280W | < 320W |
| Max. Power Consumption |
< 1000W | < 5000W | < 8900W | < 11000W |
| Internal Fuse | T-12A | T-30A | 2xT-30A | 2xT-30A |
| Dimensions | 19“/1U 483W x 402D x 44H |
19“/1U 483W x 402D x 44H |
19“/1U 483W x 486D x 44H |
19“/1U 483W x 486D x 44H |
| Net weight | 7,0 kg | 8,4 kg | 12 kg | 12 kg |
Technical Specifications
for Four-Channel Devices
| Model | SX-43500 | SX-44000 | SX-46000 | SX-48000 |
| GS1 (EAN) CODE | 4260318513067 | 4260318512022 | 4260318511865 | 4260318513012 |
| System Type | 4-Channel Class D Amplifier |
4-Channel Class D Amplifier |
4-Channel Class D Amplifier |
4-Channel Class D Amplifier |
| Output power | 4 x 2200W @ 2Ohm 4 x 1500W @ 4Ohm 4 x 900W @ 8Ohm |
4 x 2700W @ 2Ohm 4 x 1830W @ 4Ohm 4 x 1100W @ 8Ohm |
4 x 3800W @ 2Ohm 4 x 2700W @ 4Ohm 4 x 1600W @ 8Ohm |
4 x 4600W @ 2Ohm 4 x 3650W @ 4Ohm 4 x 2000W @ 8Ohm |
| Output Power (Bridge Mode) | 2 x 4000W @ 4Ohm 2 x 3000W @ 8Ohm 2 x 1800W @16Ohm |
2 x 5000W @ 4Ohm 2 x 3660W @ 8Ohm 2 x 3200W @16Ohm |
2 x 7600W @ 4Ohm 2 x 5400W @ 8Ohm 2 x 3200W @16Ohm |
2 x 920W @ 4Ohm 2 x 7300W @ 8Ohm 2 x 4000W @16Ohm |
| THD+N @ 8Ω 1kHz,1dB | ≤0.05% | ≤0.05% | ≤0.05% | ≤0.05% |
| Slew Rate | >30v/μs | >30v/μs | >30v/μs | >30v/μs |
| Frequency Response @1Watt, 8Ohm |
10Hz - 20kHz ±0.35dB |
10Hz - 20kHz ±0.35dB |
10Hz - 20kHz ±0.35dB |
10Hz - 20kHz ±0.35dB |
| Damping Factor (@100Hz) |
>3000 | >3000 | >3000 | >3000 |
| Signal to Noise Ratio 20Hz -20 kHz |
99dB | 99dB | 99dB | 99dB |
| Channel Separation Crosstalk@1kHz |
>70dB | >70dB | >70dB | >70dB |
| Voltage Gain | 40.8dB (0,775V:85V) | 41,7dB (0,775V:94V) | 43,3dB (0,775V:113V) | 44,3dB (0,775V:127V) |
| Input Sensitivity | 0.775V/1V/1.4V/2V | 0.775V/1V/1.4V/2V | 0.775V/1V/1.4V/2V | 0.775V/1V/1.4V/2V |
| 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 |
| Frontpanel Controls | Power switch, volume control | Power switch, volume control | Power switch, volume control | Power switch, volume control |
| Backpanel Controls | Sensitivity switch, Mode switch |
Sensitivity switch, Mode switch |
Sensitivity switch, Mode switch |
Sensitivity switch, Mode switch |
| LED Indicators | Signal VU meter Protect display, Parallel mode display |
Signal VU meter Protect display, Parallel mode display |
Signal VU meter Protect display, Parallel mode display |
Signal VU meter Protect display, Parallel mode display |
| Input Connectors | XLR electronically balanced Pin 1 GND Pin 2+ Pin 3- |
XLR electronically balanced Pin 1 GND Pin 2+ Pin 3- |
XLR electronically balanced Pin 1 GND Pin 2+ Pin 3- |
XLR electronically balanced Pin 1 GND Pin 2+ Pin 3- |
| Output Connectors | 4 Neutrik NL4-Sockets | 4 Neutrik NL4-Sockets | 4 Neutrik NL4-Sockets | 4 Neutrik NL4-Sockets |
| Cooling | Ultra Quiet fan | Ultra Quiet fan | Ultra Quiet fan | Ultra Quiet fan |
| Protection | Complete short circuit, Open circuit, Thermal, Ultrasonic, HF protection Stable with reactive or unmatched loads |
Complete short circuit, Open circuit, Thermal, Ultrasonic, HF protection Stable with reactive or unmatched loads |
Complete short circuit, Open circuit, Thermal, Ultrasonic, HF protection Stable with reactive or unmatched loads |
Complete short circuit, Open circuit, Thermal, Ultrasonic, HF protection Stable with reactive or unmatched loads |
| Load Protection | Mute On/Off DC fault current Power shutdown |
Mute On/Off DC fault current Power shutdown |
Mute On/Off DC fault current Power shutdown |
Mute On/Off DC fault current Power shutdown |
| Operating Voltage | 230V (+/- 10%), 50-60Hz USA Version 110V (+/- 10%), 50-60Hz |
230V (+/- 10%), 50-60Hz USA Version 110V (+/- 10%), 50-60Hz |
PFC 100V-240V 50-60Hz |
PFC 100V-240V 50-60Hz |
| Idle Power Consumption |
< 120W | < 130W | < 155W | < 265W |
| Max. Power Consumption |
< 3000W | < 4000W | < 6000W | < 8500W |
| Internal Fuse | T-25A | T-25A | T-30A | 2xT-30A |
| Dimensions | 19“/1U 483W x 402D x 44H |
19“/1U 483W x 402D x 44H |
19“/1U 483W x 486D x 44H |
19“/1U 483W x 486D x 44H |
| Net weight | 8,0 kg | 8,2 kg | 8,4 kg | 12 kg |
Product Overview
Power Amplifiers and DSPs
