LAB GRUPPEN C 48:4 เพาเวอร์แอมป์ Total output of 4800 W  (4 ohms) in a 2U cabinet 

ติดต่อสอบถาม

• Unprecedented power density – Total output of 4800 W 

(4 ohms) in a 2U cabinet 

• Four channels – All channels bridgeable for 2- or 3-channel 

configurations

• Lo-Z or Hi-Z (70 V / 100 V) – Selectable per channel, normal or 

bridged

• Patented Class TD amplifier topology 

• Voltage Peak Limiter (VPL) – Configurable per channel to 

optimize each output for connected loads

• Phoenix-type input connectors

• Screw terminal output connectors

• Comprehensive protection and warning – Excessive output 

current, DC, high temperature, very high frequency (VHF), short 

circuit, open load, mains fuse protection, and soft start

• Efficient and uniform Intercooler® cooling 

• NomadLink® network ready 

• Unprecedented power density – Total output of 4800 W 

(4 ohms) in a 2U cabinet 

• Four channels – All channels bridgeable for 2- or 3-channel 

configurations

• Lo-Z or Hi-Z (70 V / 100 V) – Selectable per channel, normal or 

bridged

• Patented Class TD amplifier topology 

• Voltage Peak Limiter (VPL) – Configurable per channel to 

optimize each output for connected loads

• Phoenix-type input connectors

• Screw terminal output connectors

• Comprehensive protection and warning – Excessive output 

current, DC, high temperature, very high frequency (VHF), short 

circuit, open load, mains fuse protection, and soft start

• Efficient and uniform Intercooler® cooling 

• NomadLink® network ready 

An Installation Amplifier without Compromise

Installed or on tour, uncompromising quality begins with superior sound. Over the past decade, the sound of Lab.gruppen amplifiers has earned praise from renowned FOH engineers and owners 

of the world’s premier sound rental companies. At the core of 

the C Series high-power* model’s tight and transparent sound is 

patented Class TD technology. As a proprietary implementation of 

tracking Class D, Class TD approaches the exceptional efficiency of 

Class D while retaining the superior sonic quality of the best Class B 

output stages. 

A Regulated Switch Mode Power Supply (R.SMPS) contributes to 

the remarkable efficiency of the C Series high-power models, while 

at the same time providing stable operation even with wide fluctuations in mains voltage. R.SMPS also works in conjunction with Class 

TD to give extraordinary power density. More channels with more 

power are condensed into a smaller package, allowing C Series 

amplifiers to minimize rack space requirements and reduce installation costs.

Extreme power density demands efficient cooling, and here 

Lab.gruppen’s Intercooler® proves remarkably effective. Thousands 

of small copper cooling fins dissipate heat, and all output devices are 

mounted on one row perpendicular to airflow for uniform cooling.

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 one 

massive subwoofer or a series of small 100 V loudspeakers. VPL 

works in combination with adjustable input gain to achieve maximum 

headroom regardless of input levels or output impedances.

To assure reliability, and minimize service interruptions, C Series 

amplifiers offer comprehensive warning and protection features. 

Whenever faulty wiring, improper use, or extreme ambient temperatures threaten trouble, a C Series amplifier gives clear and accurate 

warning indications. Protection measures are inserted only when 

dangerous thresholds are passed. Conditions are re-checked at 

six-second intervals, and normal operation resumes when measurements return to nominal.

Every C Series amplifier 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. (NomadLink® requires 

the separate NLB 60E NomadLink® Bridge & Network Controller.)

Specifications C 48:4

Number of channels 4

Peak total output all channels driven 4800 W

Peak output voltage per channel 141 V

Max. output current per channel 17.5 Arms

Max. Output Power 16 ohms 8 ohms 4 ohms 2 ohms Hi-Z

Per ch. (all ch.’s driven) 625 W 1000 W 1200 W 600 W 900 W (70 Vrms / 100 V peak)

Bridged per ch. 2000 W 2400 W 1200 W n.r. 1800 W (140 Vrms / 200 V peak)

Performance with Gain: 35 dB and VPL: 100 V

THD 20 Hz - 20 kHz for 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 - 34.2 kHz

Input impedance 20 kOhm

Input Common Mode Rejection, CMR 50 dB

Output impedance @ 100 Hz 30 mOhm

Voltage Peak Limiter (VPL), max. peak output

VPL, selectable per ch. 3) 141, 118, 100, 85, 71, 59, 50, 42 V

VPL, when bridged 3) 1) 282, 236, 200, 170, 142, 118, 100, 84 V

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

Gain and Level

Amplifier gain selectable (all channels) 1)

– rear-panel switches 23, 26, 29, 32, 35, 38, 41, 44 dB

Default gain 35 dB

Level adjustment (per ch.) Front-panel potentiometer, 21 position detented from -inf to 0 dB, hidden behind security panel/dust filter grille

Connectors and switches

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

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

Power on/off and Remote enable on/off Individual switches on front-panel

Cooling Two fans, front-to-rear airflow, temperature controlled speed

Front-panel indicators

Common NomadLink® Network; Power Average Limiter (PAL) 2); 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 / 65-135 V

Minimum power-up voltage, 230 V / 115 V 171 V / 85 V

Power Average Limiter (PAL) 2) Yes

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

Dimensions (W/H/D) W: 483 mm (19”), H: 88 mm (2 U), D: 343 mm (13.5”)

Weight 12 kg (26.4 lbs.)

Finish Black painted steel chassis with gray painted steel front

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