LAB GRUPPEN C 28:4_US1 2800W 4-Channel Amplifier with NomadLink Network Monitoring and Dedicated Control (C 28:4_US1)
Vendor: Lab Gruppen
Available
LAB GRUPPEN C 28:4_US1 2800W 4-Channel Amplifier with NomadLink Network Monitoring and Dedicated Control
Meet the C 28:4, a dynamic powerhouse within the C Series clan—a four-channel amplifier packed with prowess. Housed in a sleek 2U chassis, it unleashes a staggering 4 × 700 W output into 4 ohm loads. The C Series amplifiers redefine versatility, effortlessly adapting to diverse load conditions. Equipped with a unique Voltage Peak Limiter (VPL™) on each channel, it optimizes output for any loudspeaker load, whether it's a thundering subwoofer or an array of small 100/70 V speakers. VPL, in tandem with adjustable input gain, ensures unparalleled headroom, adapting flawlessly to input levels and output impedances. But that's not all—the C Series arrives prepped for the NomadLink® network straight out of the box. With NomadLink, harness the power of DeviceControl software, effortlessly displaying vital amplifier parameters. Seamlessly command channel mutes and power on/off remotely through network control. Elevate your audio experience with the C 28:4 amplifier—where adaptability meets performance at its pinnacle.
Features
- 2,800 Watt, 4-channel amplifier with up to 700 Watts output per channel and NomadLink network for monitoring and control
- Selectable gain plus scalable Voltage Peak Limiter (VPL) and bridge-mode operation allow custom configuration for any application
- 4 x 300 Watts into 2 Ohms, 4 x 700 Watts into 4 Ohms, 4 x 700 Watts into 8 Ohms, 4 x 600 Watts into 16 Ohms, 4 x 700 Watts into Hi-Z 70 V, 4 x 700 Watts into Hi-Z 100 V
- Proven and reliable Class-TD output stage delivers Class-A/B audio quality with Class-D efficiency
- Regulated Switch Mode Power Supply (R.SMPS) ensures constant power output at all times
- Intuitive DeviceControl software monitors and controls key functions via the NomadLink network
- Comprehensive protection scheme including current, voltage, DC, temperature, short circuit and open load warnings
- Efficient Intercooler copper cooling system dissipates more heat for extended peak output
- 4 x balanced analog audio inputs on 3-pin Phoenix connectors
- 4 x barrier strip 2-pole screw terminal output connectors
- Removable dust filter grille for increased air circulation
- Compact and durable 2U rackmount chassis saves space in install applications
General
Number of amplifier channels |
4 |
Peak total output all channels driven |
2800 W |
Peak output voltage per channel |
141 V |
Max output current per channel |
12 Arms |
Max output power (all channels driven)
16 ohms |
600 W |
8 ohms |
700 W |
4 ohms |
700 W |
2 ohms |
300 W |
Hi-Z per ch. (all ch.’s driven): 70 Vrms / 100 V peak |
700 W |
Max output power bridged
16 ohms |
1400 W |
8 ohms |
1200 W |
4 ohms |
600 W |
2 ohms |
Not recommended 1 |
Bridged per ch.: 140 Vrms / 200 V peak |
1400 W |
Performance
THD 20 Hz - 20 kHz at 1 W |
<0.1% |
THD at 1 kHz and 1 dB below clipping |
<0.05% |
Signal to Noise Ratio |
>112 dBA |
Channel separation (Crosstalk) at 1 kHz |
>70 dB |
Frequency response (1 W into 8 ohms) + 0 / -3 dB |
6.8 Hz - 34 kHz |
Input impedance |
20 kOhm |
Common Mode Rejection (CMR) |
>50 dB, 20 Hz - 20 kHz |
Output impedance @ 100 Hz |
30 mOhm |
Gain, Sensitivity and Limiters
VPL, selectable per ch 2 |
141, 118, 100, 85, 71, 59, 50, 42 V |
VPL, when bridged 2 3 |
282, 236, 200, 170, 142, 118, 100, 84 V |
Voltage Peak Limiter mode (per ch.) |
Hard / Soft |
Amplifier gain selectable (all channels) – rear-panel switches 3 |
23, 26, 29, 32, 35, 38, 41, 44 dB |
Default gain |
35 dB |
Level adjustment (per channel) |
Front-panel potentiometer, 21 position detented from -inf to |
Connectors and Buttons
Input connectors (per ch.) |
3-pin Phoenix, electronically balanced |
Output connectors (per ch.) |
Barrier strip 2-pole screw terminals |
Output bridge mode |
A+B and/or C+D, inputs A and C are input source |
NomadLink network |
On board, 2 x RJ45 connectors IN and OUT |
Intelligent fans (on/off) |
Yes, depending on presence of output signal |
Power |
Individual switches on front panel |
Cooling |
Two fans, front-rear airflow, temperature controlled speed |
Front-panel user interface
Common |
NomadLink Network; Power Average Limiter (PAL)5; Power on |
Per channel |
Signal present / High-impedance; -10 dB and -4 dB output signal;Voltage Peak Limiter (VPL); Current Peak Limiter (CPL): Very High Frequency (VHF); High temperature; Fault; Mute |
Power
Operating voltage, 230 V / 115 V nominal |
130-265 V / 65 -135 V 4 |
Minimum power-up voltage, 230 V / 115 V |
171 V / 85 V |
Power Average Limiter (PAL) 5 |
Yes |
Power Factor Correction (PFC) |
No |
Soft-start / Inrush Current Draw |
Yes / max. 5 A |
Mains connector |
230 V CE: 16 A, CEE7; 115 V ETL: 20 A / NEMA 5-20P; C16:4: 15A/NEMA 5-15P |
Dimensions
Dimensions |
W: 483 mm (19”), H: 88 mm (2 U), D: 343 mm (13.5”) |
Weight
Weight |
12 kg (26.4 lbs) |
Finish
Finish |
Black-painted steel chassis with gray-painted steel front |