Lab Gruppen C28:4 Amplifier

Lab Gruppen C28:4 4-Channel Amplifier with NomadLink Network Monitoring and Dedicated Control for Install Applications

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.

Specification :

Number of amplifier channels : 4

Peak total output all channels driven : 2800 W

Peak output voltage per channel : 141 V

Max output current per channel : 12 Arms

Max output power (all channels driven) :

16 ohms – 600 W

8 ohms – 700 W

4 ohms – 700 W

2 ohms – 300 W

Hi-Z per ch. (all ch.’s driven) : 70 Vrms / 100 V peak – 700 W

Max output power bridged :

16 ohms – 1400 W

8 ohms – 1200 W

4 ohms – 600 W

2 ohms – Not recommended!

Bridged per ch.: 140 Vrms / 200 V peak – 1400 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 dB : 6.8 Hz – 34 kHz

Input impedance : 20 kOhm

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

Output impedance @ 100 Hz : 30 mOhm