Lab Gruppen C284 4-Channel Phoenix Amplifier
The C 28:4 is one of two mid-power, four-channel amplifiers in the C Series family. Attractively packaged in a 2U chassis, it provides 4 × 700 W output into 4 ohm loads.
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
Specifications:
- 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
- Approvals
- Approvals: CE, ANSI/UL 60065 (ETL), CSA C22.2 NO. 60065, FCC
- 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
- Approvals
- Approvals: CE, ANSI/UL 60065 (ETL), CSA C22.2 NO. 60065, FCC
