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Lab Gruppen C 48:4 - 4 Channel Class TD Dedicated Install Amplifier

  • Dale #:

    LABG-C484115E
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Description

The C 48:4 is the third largest amplifier in the C Series family, delivering an impressive 4 × 1200 W at 4 ohms. The exceptional power output plus a long list of protection and monitoring features are all packed into a 2U chassis. C Series amplifiers are uniquely capable of adapting to a wide var... Read More

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Description

The C 48:4 is the third largest amplifier in the C Series family, delivering an impressive 4 × 1200 W at 4 ohms. The exceptional power output plus a long list of protection and monitoring features are all packed into a 2U chassis.

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.

Features:
  • 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.)

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Product Specs

General Specifications
Number of channels4
Peak total output all channels driven4800 W
Peak output voltage per channel141 V
Max. output current per channel17.5 Arms
Max. Output Power
Per ch. (all ch.’s driven)
Bridged per ch.
16 ohms    8 ohms    4 ohms    2 ohms     Hi-Z
625 W     1000 W    1200 W   600 W    900 W (70 Vrms / 100 V peak)
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 dB6.8 Hz - 34.2 kHz
Input impedance20 kOhm
Input Common Mode Rejection, CMR50 dB
Output impedance @ 100 Hz30 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) – rear-panel switches 1)23, 26, 29, 32, 35, 38, 41, 44 dB
Default gain35 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 modeA+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/offIndividual switches on front-panel
CoolingTwo fans, front-to-rear airflow, temperature controlled speed
Front-panel indicators
Common NomadLink® Network; Power Average Limiter (PAL) 2) ; 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 / 65-135 V
Minimum power-up voltage, 230 V / 115 V171 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
ApprovalsCE, ANSI/UL 60065 (ETL), CSA C22.2 NO. 60065, FCC

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