The C 5:4X is a versatile four-channel amplifier, delivering 4 × 125 W at 4 ohms, 8 ohms, 16 ohms or 70 Vrms; 250 W at 100 Vrms is available in bridge mode.
The C 5:4X is uniquely suited for a range of installed applications with its relatively lower power output requirements, compact & lightweight 2U chassis, and a channel density and installation flexibility that are greater than those found in Lab.Gruppen's C Series amps. Because the unique benefits of Class TD® are more applicable at higher power levels, the C5:4X employs a cost-efficient proprietary Class D output design. Other features include a universal power supply, selectable 35 Hz high-pass filter, and built-in GPIO control facilities.
This amplifier is 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 70 V loudspeakers (100 V in bridge mode). VPL works in combination with adjustable input gain (adjustable in 2-channel blocks) to achieve maximum headroom regardless of input levels or output impedances. Additionally a 35 Hz high pass filter may be inserted in each 2-channel section.
Every C Series amplifier 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.
GPIO facilities – provided exclusively on the C5:4X allows access to key amplifier functions such as power on/off and fault reporting.
Features:
- Four channels in 2U: High channel density reduces space requirements and installation time
- High continuous output power of 125 W per channel at 70 V, 4 ohms, 8 ohms, and 16 ohms*
* Maximum continuous output power, all 8 channels driven, VPL set at 100 V and Gain set at 32 dB.
- All channels individually selectable for lo-Z or hi-Z: Loudspeakers (2 ohm – 16 ohm) and distributed systems can be connected to the same unit
- Bridged operation: Channel pairs bridgeable for increased output or for driving 100 V systems
- Patented output stage based on Class D topology
- High efficiency for lower thermal stress
- General Purpose Input/Output (GPIO): Compatible with third-party control systems
- NomadLink® network ready
- Universal Power Factor Corrected PSU with IEC inlet
- Efficient cooling: Dual variable speed, intelligent fans and parallel airflow over output devices provide uniform cooling
- Comprehensive circuit protection and fault indication
- Phoenix-style input connectors and barrier strip output connectors
Specifications:
- Number of channels: 4
- Peak total output all channels driven: 500 W
- Peak output voltage per channel: 100 V / 70 Vrms
- Max. output current per channel: 5.6 Arms
- Max. Output Power: PLEASE CONSULT THIRD PHOTO FOR OUTPUT POWER SPECS.
- Performance with Gain: 32 dB and VPL: 100 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: 2.3 Hz - 56 kHz
Input impedance: 20 kOhm
Input Common Mode Rejection, CMR: 50 dB
Output impedance @ 100 Hz: 48 mOhm
- Voltage Peak Limiter (VPL), max. peak output
VPL, selectable per ch.*: 100, 63, 45, 32 V
VPL, selectable when bridged*^: 200, 126, 90, 64 V
Voltage Peak Limiter mode (per ch.): Hard / Soft
*For sine waves, peak voltage output values translate to Vrms with the formula V/1.41 =
^Automatic -6 dB gain compensation when bridging channels. Ch.s A+B and/or C+D, can be bridged individually
- Gain and Level
Amplifier gain selectable (all channels)^ – rear-panel switches: 29, 32, 35, 38 dB
^Automatic -6 dB gain compensation when bridging channels. Ch.s A+B and/or C+D, can be bridged individually
Default gain: 32 dB
Level adjustment (per ch.): Front-panel potentiometer, 21 position detented from -inf to 0 dB, hidden behind security panel/dust filter grille
- 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 signal source
- High pass filter: Fixed at 35 Hz, switchable per channel
- NomadLink® network: On board, 2 x RJ45 connectors, IN and OUT
- 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
- General Purpose Outputs (GPO): Contact Closure types, 2-pole Phoenix
- General Purpose Inputs (GPI): Contact Closure types, 2-pole Phoenix
- Front-panel indicators:
Common: NomadLink® Network; Power Average Limiter (PAL) 2); Power on
Per channel:
Signal present / High-impedance; Voltage Peak Limiter (VPL); Current Peak Limiter (CPL):
Very High Frequency (VHF); High temperature; Fault; Mute
- Operating voltage, 230 V / 115 V nominal: 100-240 V
- Minimum power-up voltage, 230 V / 115 V: 80 V
- Power Average Limiter (PAL)**: Yes
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.
- Soft start / Inrush current draw: Yes / max. 5 A
- Mains connector: IEC Inlet / NEMA 5-15P
- Dimensions: 19" W x 2 RU H x 13.5" D (483 x 88 x 343 mm)
- Weight: 18.75 lbs. (8.5 kg)
- Finish: Black painted steel chassis with gray painted steel front
- Approvals: CE, ANSI/UL 60065 (ETL), CSA C22.2 NO. 60065, FCC
