C 5:4X
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 one of four C…X models in the C Series, each uniquely suited for a range of installed applications with relatively lower power output requirements. C…X models share most features of the original (higher power) C Series models, and they share the same compact, lightweight 2U chassis. However, the C…X models are offered in both four- and eight-channel versions, offering even greater channel density and installation flexibility. Also, because the unique benefits of Class TD® are more applicable at higher power levels, the C…X models employ a cost-efficient proprietary Class D output design. Other features unique to C…X models include a universal power supply, selectable 35 Hz high-pass filter, and built-in GPIO control facilities.
This amplifier is 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 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 C…X models – allow access to key amplifier functions such as power on/off and fault reporting.
* Maximum continuous output power, all 8 channels driven, VPL set at 100 V and Gain set at 32 dB.
TECHNICAL SPECIFICATIONS
General Number of channels: 4 Peak total output all channels driven: 500 W Peak output voltage per channel: 100 V Max output current per channel: 5.6 Arms
Max output power all channels driven 16 ohms: 125 W 8 ohms: 125 W 4 ohms: 125 W 2 ohms: 60 W Hi-Z per ch. (all ch.’s driven): 70 Vrms / 100 V peak: 125 W
Max output power bridged 16 ohms: 250 W 8 ohms: 250 W 4 ohms: 125 W 2 ohms: Not recommended (*1) Bridged per ch.: 140 Vrms / 200 V peak: 250 W
Performance THD 20 Hz - 20 kHz at 1W: <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: 48 mOhm
Gain, Sensitivity and Limiters VPL, selectable per ch (*2): 100, 63, 45, 32 V VPL, when bridged (*2 3): 200, 126, 90, 64 V Voltage Peak Limiter mode (per ch.): Hard / Soft Amplifier gain selectable (all channels) – rear-panel switches (*3): 29, 32, 35, 38 dB Default gain: 32 dB Level adjustment (per channel): Front-panel potentiometer, 21 position detented from -inf to
Connectors and Buttons Input connectors (per ch.): 3-pin Phoenix, electronically balanced Output connectors (per ch.): Barrier strip 2-pole screw terminals Output bridge mode: A+B, C+D, E+F, G+H, inputs A, C, E, G 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: Individual switches on front panel Cooling: Two fans, front-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 user interface Common: NomadLink Network; Power Average Limiter (PAL) (*4); Power on Per channel: Signal present / High-impedance; Voltage Peak Limiter (VPL); Current Peak Limiter (CPL): Very High Frequency (VHF); High temperature; Fault; Mute
Power Operating voltage, 230 V / 115 V nominal: Universal power supply 65-265 V Minimum power-up voltage, 230 V / 115 V 80 V Power Average Limiter (PAL) (*4): Yes Power Factor Correction (PFC): Yes Soft-start / Inrush Current Draw: Yes / max. 5 A Mains connector: IEC inlet
Dimensions - Weight - Finish Dimensions W: 483 mm (19”), H: 88 mm (2 U), D: 343 mm (13.5”) Weight: 8.5 kg (18.75 lbs.) Finish: Black painted steel chassis with gray painted steel front
Approvals Approvals CE, ANSI/UL 60065 (ETL), CSA C22.2 NO. 60065, FCC
Notes *1: 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 significantly higher than running individual channels and therefore this mode of operation is not recommended. *2: 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. *3: Automatic -6 dB gain compensation when bridging channels. Ch.’s A+B and/or C+D, can be bridged individually. *4: 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.
