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7. Technical Specifications

C Series C 88:4, C 68:4, C 48:4, C 28:4 and C 16:4 Operation Manual rev 2.2.3

7. Technical Specifications

Following are the C Series technical specifications. These figures are accurate at the time of printing but please note that all figures are
subject to change without notice. For the most accurate and current information available, please visit www.labgruppen.com. Information
for C...X models is contained in a separate manual.

Model

Number of channels
Peak total output all channels driven
Peak output voltage per channel
Max. output current per channel

Max Output Power

16 ohms per ch. (all ch.’s driven)
8 ohms per ch. (all ch.’s driven)
4 ohms per ch. (all ch.’s driven)
2 ohms per ch. (all ch.’s driven)
Hi-Z per ch. (all ch.’s driven): 70 Vrms / 100 V peak
Hi-Z per ch. (all ch.’s driven): 100 Vrms / 141 V peak

16 ohms Bridged per ch.

8 ohms Bridged per ch.

4 ohms Bridged per ch.

2 ohms Bridged per ch.

Hi-Z Bridged per ch.

140 Vrms / 200 V peak

Performance with Gain:

THD 20 Hz - 20 kHz for 1 W
THD at 1 kHz and 1 dB below clipping
Signal To Noise Ratio
Channel separation (Crosstalk) at 1 kHz
Frequency response (1 W into 8 ohms) +0/-3 dB
Input impedance
Common Mode Rejection (CMR)
Output impedance @ 100 Hz

Voltage Peak Limiter (VPL), max. peak output

VPL, selectable per ch.

VPL, when bridged

1) 3)

Voltage Peak Limiter mode (per ch.)

Gain and Level

Amplifier gain selectable (all channels)

– rear-panel switches
Default gain

Level adjustment (per ch.)

Connectors and switches

Input connectors (per ch.)
Output connectors (per ch.)
Output bridge mode
High pass filter
NomadLink network
Intelligent fans (on/off)
Power on/off and Remote enable on/off
Cooling
General Purpose Outputs (GPO)
General Purpose Inputs (GPI)

Front-panel indicators

Common

Per channel

Power

Operating voltage, 230 V / 115 V nominal
Minimum power-up voltage, 230 V / 115 V
Power Average Limiter (PAL)

Power Factor Correction (PFC)
Soft-start / Inrush Current Draw
Mains connector

Dimensions
Weight
Finish

Approvals

Note 1):

Automatic -6 dB gain compensation when bridging channels. Ch.’s A+B and/or C+D, E+F, G+H, can be bridged individually.

Note 2):

PAL can reduce the maximum output power to keep the power supply operating safely, and/or to prevent excessive current draw tripping the mains breaker. Refer to Operation Manual.

Note 3):

For sine waves, peak voltage output values translate to Vrms with the formula V/1.41 = Vrms. E.g. 100 V peak equals app. 70 V peak. Hence, outputs can be set for high-impedance loads without

requiring a transformer.

Note 4):

Regarding n.r. (not recommended) notes: The amplifier will be fully operational in bridge-mode into 2 ohm and high impedance (Hi-Z) loads, but due to physical constraints in the construction, the max.

output power will not be significanty higher than running individual channels and therefore this mode of operation is not recommended.

Note 5):

C 88:4 mains connector: 30 A Twist lock.

Note 6):

Separate 230 V or 115 V versions available. Not selectable on the amplifier.

All specifications are subject to change without notice.

C 88:4

C 68:4

C 48:4

C 28:4

C 16:4

C 20:8X

C 10:8X

C 10:4X

C 5:4X

8800 W

6800 W

4800 W

2800 W

1600 W

2000 W

1000 W

500 W

141 V

100 V

35.5 Arms

24.5 Arms

17.5 Arms

12 Arms

8.5 Arms

8 Arms

5.6 Arms

8 Arms

5.6 Arms

650 W

625 W

600 W

400 W

250 W

125 W

250 W

125 W

1250 W

1200 W

1000 W

700 W

400 W

250 W

125 W

250 W

125 W

2100 W

1700 W

1200 W

700 W

300 W

250 W

125 W

250 W

125 W

2200 W

1200 W

600 W

300 W

140 W

125 W

60 W

125 W

60 W

2200 W

1600 W

1100 W

700 W

400 W

250 W

125 W

250 W

125 W

1700 W

1200 W

900 W

700 W

400 W

n.a.

2500 W

2400 W

2000 W

1400 W

800 W

500 W

250 W

500 W

250 W

4200 W

3400 W

2400 W

1200 W

600 W

500 W

250 W

500 W

250 W

4400 W

2400 W

1200 W

600 W

n.r

250 W

125 W

250 W

125 W

n.r

4400 W

3200 W

1800 W

1400 W

800 W

500 W

250 W

500 W

250 W

35 dB and VPL: 100 V / C 88:4: 35 dB and VPL: 141 V

32 dB and VPL: 100 V

<0.1%

<0.05%

>112 dBA

>70 dB

6.8 Hz - 34 kHz

20 kOhm

>50 dB, 20 Hz - 20 kHz

30 mOhm

48 mOhm

141, 118, 100, 85, 71, 59, 50, 42 V

100, 63, 45, 32 V

282, 236, 200, 170, 142, 118, 100, 84 V

200, 126, 90, 64 V

Hard / Soft

23, 26, 29, 32, 35, 38, 41, 44 dB

29, 32, 35, 38 dB

35 dB

32 dB

Front-panel potentiometer, 21 position detented from -inf to 0 dB,
hidden behind security panel/dust filter grille

3-pin Phoenix, electronically balanced

Barrier strip 2-pole screw terminals

A+B and/or C+D, inputs A and C are input source

A+B, C+D, E+F, G+H, inputs A, C, E, G are signal source

N/A

Fixed at 35 Hz, switchable per channel

On board, 2 x RJ45 connectors IN and OUT

On board, 2 x RJ45 connectors, IN and OUT

Yes, depending on presence of output signal

Individual switches on front panel

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

N/A

Contact Closure types, 2-pole Phoenix

N/A

Contact Closure types, 2-pole Phoenix

NomadLink Network; Power Average Limiter (PAL)

; Power on

NomadLink Network; Power Average Limiter (PAL)

; Power on

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

Signal present / High-impedance; Voltage Peak Limiter (VPL); Current
Peak Limiter (CPL): Very High Frequency (VHF); High temperature;
Fault; Mute

130-265 V / 65 -135 V

Universal power supply 65-265 V

171 V / 85 V

80 V

Yes

Yes / max. 5 A

230 V CE: 16 A, CEE7; 115 V ETL: 20 A / NEMA 5-20P; C16:4: 15A/NEMA 5-15P

IEC Inlet

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

12 kg (26.4 lbs.)

8.5 kg (18.75 lbs.)