Lab Gruppen Series C 5 4X Four Channel Amplifier 125 Watts Per Channel

This Lab Gruppen C 5:4X is a versatile four-channel amplifier designed for installation applications and ready to use.

This item is available for Pickup in our Audio Department at

158 W Clinton St

Dover, NJ 07801

7 days a week from 11AM - 6PM

Our in-house Technician is available M-F during store hours.

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General Specifications

• Number of Channels: 4
• Output Power (per channel):
• • 125 W at 4 ohms, 8 ohms, 16 ohms, or 70 Vrms
  • 250 W at 100 Vrms in bridge mode
• Frequency Response: 6.8 Hz to 34 kHz (+0/-3 dB at 1 W into 8 ohms)
• Total Harmonic Distortion (THD):
• • <0.1% (20 Hz - 20 kHz for 1 W)
  • <0.05% (at 1 kHz and 1 dB below clipping)
• Signal-to-Noise Ratio: >112 dBA
• Channel Separation (Crosstalk): >70 dB at 1 kHz
• Input Impedance: 20 kOhm electronically balanced

Power and Protection

• Universal Power Supply: Accepts 65–265 V (+/-10%), with Power Factor Correction (PFC)
• Protection Features:
• • Over-temperature, excessive current, DC at output, and open load conditions
  • Soft-start and PSU current limiting to prevent circuit breaker trips

Connectivity

• Inputs: Phoenix-style connectors (3-pin, electronically balanced)
• Outputs: Barrier strip screw terminals
• Network Control:
• • NomadLink® ports for remote monitoring and control via Ethernet-linked PC
  • General Purpose Input/Output (GPIO) for integration with third-party systems

Physical and Design

• Dimensions:
• • Width: 483 mm (19 in.)
  • Height: 88 mm (2U)
  • Depth: 343 mm (13.5 in.)
• Weight: 8.5 kg (18.75 lbs.)
• Cooling: Dual variable-speed fans with front-to-rear airflow
• Finish: Black painted steel chassis with gray painted steel front

Additional Features

• All channels are bridgeable in pairs.
• Voltage Peak Limiter (VPL) allows channel-specific optimization.
• High-pass filter at 35 Hz is switchable per channel.
• Supports both low-Z and high-Z loudspeakers without requiring