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.
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*
•• 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
APPLICATIONS:
• Auditoriums
• Performing Arts Centers
• Convention Centers
• Stadiums and Arenas
• Theme Parks
• Hotels
• Houses of Worship
• Restaurants
• Clubs
• Educational Establishments
• Boardrooms
• Museums
• Offices
• Shopping Malls
• Transportation Facilities
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 16 ohms 8 ohms 4 ohms 2 ohms Hi-Z
Per ch. (all ch.’s driven) 125 W 125 W 125 W 60 W 125 W (70 Vrms / 100 V peak)
Bridged per ch. 250 W 250 W 125 W n.r. 250 W (140 Vrms / 200 V peak)
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. 3) 100, 63, 45, 32 V
VPL, selectable when bridged 3) 1) 200, 126, 90, 64 V
Voltage Peak Limiter mode (per ch.) Hard / Soft
Gain and Level
Amplifier gain selectable (all channels) 1)
– rear-panel switches
29, 32, 35, 38 dB
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
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 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
Power
Operating voltage, 230 V / 115 V nominal 100-240 V
Minimum power-up voltage, 230 V / 115 V 80 V
Power Average Limiter (PAL) 2) Yes
Soft start / Inrush current draw Yes / max. 5 A
Mains connector IEC Inlet / NEMA 5-15P
Dimensions (W/H/D) 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 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.
All specifications are subject to change without notice.
