LAB GRUPPEN C 28:4 เครื่องขยายเสียง 4 แชนแนล 2,800 วัตต์ 4 × 700 W 4 ohm

รหัสสินค้า : C 28:4

LAB GRUPPEN C 28:4 เครื่องขยายเสียง 4 แชนแนล 2,800 วัตต์

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.

C Series amplifiers are uniquely capable of adapting to a wide variety of demanding load conditions. Each channel has an individually configurable Voltage Peak Limiter (VPL™), which allows the output to be optimized for any loudspeaker load – whether a single large subwoofer or a series of small 100/70 V loudspeakers. VPL works in combination with adjustable input gain to achieve maximum headroom regardless of input levels or output impedances.

Every C Series is ready for the NomadLink® network right out of the box. With NomadLink, key amplifier parameters are displayed via DeviceControl software, and remote control of channel mutes and power on/off is under network control.

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
• 10-Year Warranty Program*
• Designed and engineered in Sweden

General

Number of amplifier channels4

Peak total output all channels driven2800 W

Peak output voltage per channel141 V

Max output current per channel12 Arms

Max output power (all channels driven)

16 ohms600 W

8 ohms700 W

4 ohms700 W

2 ohms300 W

Hi-Z per ch. (all ch.’s driven): 70 Vrms / 100 V peak700 W

Max output power bridged

16 ohms1400 W

8 ohms1200 W

4 ohms600 W

2 ohmsNot recommended 1

Bridged per ch.: 140 Vrms / 200 V peak1400 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 dB6.8 Hz - 34 kHz

Input impedance20 kOhm

Common Mode Rejection (CMR)>50 dB, 20 Hz - 20 kHz

Output impedance @ 100 Hz30 mOhm

Gain, Sensitivity and Limiters

VPL, selectable per ch 2141, 118, 100, 85, 71, 59, 50, 42 V

VPL, when bridged 2 3282, 236, 200, 170, 142, 118, 100, 84 V

Voltage Peak Limiter mode (per ch.)Hard / Soft

Amplifier gain selectable (all channels) – rear-panel switches 323, 26, 29, 32, 35, 38, 41, 44 dB

Default gain35 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 modeA+B and/or C+D, inputs A and C are input source

NomadLink networkOn board, 2 x RJ45 connectors IN and OUT

Intelligent fans (on/off)Yes, depending on presence of output signal

PowerIndividual switches on front panel

CoolingTwo fans, front-rear airflow, temperature controlled speed

Front-panel user interface

CommonNomadLink Network; Power Average Limiter (PAL)5; Power on

Per channelSignal 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 nominal130-265 V / 65 -135 V 4

Minimum power-up voltage, 230 V / 115 V171 V / 85 V

Power Average Limiter (PAL) 5Yes

Power Factor Correction (PFC)No

Soft-start / Inrush Current DrawYes / max. 5 A

Mains connector230 V CE: 16 A, CEE7; 115 V ETL: 20 A / NEMA 5-20P; C16:4: 15A/NEMA 5-15P

Dimensions

DimensionsW: 483 mm (19”), H: 88 mm (2 U), D: 343 mm (13.5”)

Weight

Weight12 kg (26.4 lbs)

Finish

FinishBlack painted steel chassis with gray painted steel front

Approvals

ApprovalsCE, ANSI/UL 60065 (ETL), CSA C22.2 NO. 60065, FCC