Lab.gruppen C 88:4 Technical Data - Specifications C 88:4
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Item no. TDS-C884
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
Max. Output Power
16 ohms
8 ohms
4 ohms
2 ohms
70 Vrms/100 Vrms peak
Per ch. (all ch.’s driven)
625 W
1250 W
2100 W
2200 W
2200 W
Bridged per ch.
2500 W
4200 W
4600 W
n.r
4)
n.r
4)
Performance with Gain: 35 dB and VPL: 141 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 dB
6.8 Hz - 34.2 kHz
Input impedance
20 kOhm
Input Common Mode Rejection, CMR
50 dB
Output impedance @ 100 Hz
30 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)
1)
– rear-panel switches
23, 26, 29, 32, 35, 38, 41, 44 dB
Default gain
35 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 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)
2)
; 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, 230 V / 115 V nominal
130 -265 / 65-135 V
Minimum power-up voltage, 230 V / 115 V
171 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: 30 A Twist Lock
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
Approvals
CE, ANSI/UL 60065 (ETL), CSA C22.2 NO. 60065, FCC
Note 1): Automatic -6 dB gain compensation when bridging channels. Ch.’s A+B and/or C+D, 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 Vrms.
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.
All specifications are subject to change without notice.