Lab Gruppen C 88:4 - 2200W 4-Channel at 4-Ohm 70V/100V Power Amplifier with Terminal Outputs and NomadLink Network Monitoring in Black Finish

The Lab Gruppen C 88:4 is a powerful, 4-channel amplifier designed to meet the most demanding audio requirements for both live and installed sound applications. Renowned for its clarity and precision, Lab Gruppen amplifiers are trusted by some of the world's top FOH engineers and sound rental companies. The C 88:4 is at the forefront of this legacy, delivering exceptional sound quality through its patented Class TD technology. This proprietary implementation of tracking Class D amplifiers delivers the efficiency of Class D while retaining the superior audio quality typically found in Class A/B output stages, ensuring that the C 88:4 produces transparent, distortion-free sound at all power levels.

The amplifier offers an impressive 8,800 watts of total output, with 2,200 watts per channel at 4 ohms, making it ideal for high-powered applications such as large PA systems, concert venues, and high-impedance speaker arrays. This incredible output is made possible by a Regulated Switch Mode Power Supply (R.SMPS) that ensures constant, reliable power output even under varying mains voltage conditions. Combined with Class TD technology, R.SMPS enables the C 88:4 to deliver extraordinary power density, allowing it to fit more power into a compact 2U rackmount chassis while minimizing rack space requirements and reducing installation costs.

To ensure reliable operation under demanding conditions, the C 88:4 incorporates a comprehensive cooling system, including Lab Gruppen's advanced Intercooler copper cooling technology. This system uses thousands of small copper fins to efficiently dissipate heat, ensuring that the amplifier can operate at peak output without thermal issues. The amplifier is also equipped with a Voltage Peak Limiter (VPL) for each channel, which allows for precise control over output levels and ensures optimal performance for different loudspeaker loads, whether you're driving a subwoofer or a series of small 100V speakers. The VPL works in conjunction with the amplifier's adjustable input gain to maintain maximum headroom and prevent clipping, regardless of input levels or output impedances.

For applications requiring networked control, the C 88:4 is fully compatible with NomadLink, a powerful network monitoring and control system. Through the NomadLink system, key amplifier parameters can be monitored in real-time, and remote control of channel mutes and power on/off functions is available via the intuitive DeviceControl software. This makes the C 88:4 an excellent choice for large, distributed audio systems that require centralized control and monitoring. The amplifier's user-friendly front panel provides clear indicators for each channel, including status for signal presence, limiter activation, and protection conditions, ensuring that the amplifier's performance can be easily monitored and adjusted as needed.

Features

• 4-channel amplifier with up to 2,200W output per channel
• Class TD technology combining Class D efficiency with Class A/B audio quality
• Regulated Switch Mode Power Supply (R.SMPS) ensures stable power output
• Individually configurable Voltage Peak Limiter (VPL) for optimized output across different loudspeakers
• NomadLink network support for real-time monitoring and remote control via DeviceControl software
• Efficient Intercooler copper cooling system for superior heat dissipation and extended peak output
• Compact 2U rackmount chassis for space-efficient installation
• Balanced 3-pin Phoenix inputs and secure 2-pole screw terminal outputs
• Intelligent fan system with temperature-controlled speed for efficient cooling
• Comprehensive protection features for current, voltage, temperature, and fault monitoring
• CE, ANSI/UL 60065, CSA C22.2 NO. 60065, and FCC approvals

Specifications

General

• Number of channels: 4
• Peak total output all channels driven: 8800 W
• Peak output voltage per channel: 141 V
• Max. output current per channel: 35.5 Arms

Maximum Output Power

• Per channel (all channels driven): 625 W @ 16 Ohm, 1250 W @ 8 Ohm, 2100 W @ 4 Ohm, 2200 W @ 2 Ohm, 2200 W @ Hi-Z (70 Vrms / 100 V peak)
• Bridged per channel: 2500 W @ 16 Ohm, 4200 W @ 8 Ohm, 4600 W @ 4 Ohm, 3200 W @ Hi-Z (140 Vrms / 200 V peak)

Performance with Gain (35 dB and VPL: 141V)

• 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 kHz
• Input impedance: 20 kOhm
• Common Mode Rejection, CMR: >50 dB, 20 Hz to 20 kHz
• Output impedance @ 100 Hz: 30 mOhm

Voltage Peak Limiter (VPL), Maximum Peak Output

• VPL, selectable per channel: 141, 118, 100, 85, 71, 59, 50, 42 V
• VPL, when bridged: 282, 236, 200, 170, 142, 118, 100, 84 V
• Voltage Peak Limiter mode (per channel): Hard/Soft

Gain and Level

• Amplifier gain selectable (all channels): 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 0 dB, hidden behind security panel/dust filter grille

Connectors and Switches

• Input connectors (per channel): 3-pin Phoenix, electronically balanced
• Output connectors (per channel): 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); 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, 230V / 115V nominal: 130-265V / 65-135V
• Minimum power-up voltage, 230V/115V: 171V / 85V
• Power Average Limiter (PAL): Yes
• Power Factor Correction (PFC): No
• Soft start / Inrush Current Draw: Yes/max. 5 A
• Mains connector: 230V CE: 16 A, CEE7; 115V ETL: 20A/NEMA 5-20P

Physical

• Dimensions (WHD): 19 x 3.46 x 13.5 inches
• Weight: 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