Crestron AMP-2800

Robust and efficient amplification, designed to complement Crestron Avia™ Digital Signal Processors.




The Crestron® AMP-2800 amplifier is designed to complement the Crestron Avia™ family of Digital Signal Processors, and is well-suited for all types of commercial audio applications. The AMP-2800 furnishes two channels of clean, efficient amplification in a space-saving 1 RU rack-mountable chassis. Each channel is configurable for Lo-Z or Hi-Z operation, as well as stereo and bridged modes. Network connectivity enables configuration, monitoring, and control via the Crestron Avia Audio Tool software, a Crestron control system, Crestron XiO Cloud™ service^[1], or Crestron Fusion® software.^[2]

Solid & Efficient Performance
The AMP-2800 is engineered to deliver exceptional performance and reliability with low distortion, low noise, and high power headroom. Advanced Class D technology maximizes efficiency to reduce power consumption and heat dissipation. The internal universal power supply with power factor correction ensures consistent performance with varying line voltages.

The AMP-2800 features professional balanced inputs that support input signal levels up to +24 dBu. Rear panel input attenuation controls allow for signal level matching. Remote level control and monitoring is enabled using the Crestron Avia Audio Tool software, or using a touch screen control panel or mobile device through integration with a Crestron control system. Integration with a control system also enables centralized monitoring and control of multiple amplifiers throughout a facility as part of a Crestron Fusion or Crestron XiO Cloud managed enterprise.

Configurable & Controllable
The AMP-2800 delivers 800 watts per channel into 4 or 8 ohm “Lo-Z” loads. Each channel is individually configurable via software for use with “Hi-Z” distributed speaker systems (either 70V or 100V). The amplifier can also be configured for stereo or 8 ohm bridged mono operation. Stereo mode enables remote control of a stereo pair of speakers using a single set of controls. Bridged mode allows two channels to be combined to provide a single channel delivering up to 1200 watts into 8 ohms.

Each output channel can be independently configured to throttle the amount of power delivered to connected loudspeakers. Power throttling can be used to protect connected loudspeakers from receiving too much power, making the AMP-2800 a software configurable power amplifier with up to 800 Watts per channel.

The power throttle can also be used for output load balancing. This is useful when mixing different loudspeaker types on adjacent channels such as a subwoofer that requires continuously high power versus a high frequency compression driver with a much lower power requirement. Using Power throttle, the output of the amplifier is provisioned to match the loudspeaker and line drive requirements. Amplifier gain is automatically adjusted such that a 0dBu input will yield the selected power throttle output level. No matter the gain from head-end equipment feeding the amplifier, power throttle will consistently provide an extra level of loudspeaker protection and overall system optimization.

Fully Protected
The AMP-2800 features comprehensive protection against overheating, shorted or overloaded speaker lines, excessive signal levels, and other faults. Each channel is independently protected, allowing an individual channel to enter protection mode without interrupting the operation of the other channel. Protection is automatic, quickly disconnecting the speaker line and shutting down the affected channel, and then restoring normal operation once the fault is resolved. Clear indication of any fault is provided on the front panel, and may also be reported to a control system to provide notification on a touch screen or mobile device, through a text message or e-mail, or at a central help desk using Crestron Fusion software or the Crestron XiO Cloud service.

Communications
Ethernet	10/100 Mbps, auto-switching, auto-negotiating, auto-discovery, full/half duplex, TCP/IP, UDP/IP, CIP, DHCP, SSL, SSH, SFTP (SSH File Transfer Protocol)
USB Device	USB device port for computer console (setup)
Audio
Input Signal Types	Balanced or unbalanced analog line-level
Output Signal Types	4/8 Ohm, 70 or 100 Volt direct-coupled
Operating Modes (Configurable via Avia Audio Tool software)	Mono: Each channel is configurable to operate independently from all other channels Stereo:The output channels are configurable to operate as a stereo pair with linked control settings Bridged: The output channels are configurable to operate as an 8 Ohm bridged mono output 4/8Ω Mode: Each channel is configurable for 4/8 Ohm “Lo-Z” output 70V/100V Mode: Each channel is configurable for 70/100 Volt “Hi-Z” output
Output Power	800 Watts per channel @ 4-8 Ohms or 70/100 Volts nominal; 1200 Watts per bridged pair of channels @ 8 Ohms
Power Throttle	800, 700, 600, 500, 400, 300, 250, 200, 150, 125, 100, 75, 50 Watts per channel
Frequency Response	20 Hz to 20 kHz ±0.5 dB at 1 Watt, 4-8 Ohms; 200 Hz to 20 kHz ±0.5 dB at 1 Watt, 70/100 Volts
High Pass Filter	-3 dB @ 80 Hz, 12 dB per octave in 70V or 100V mode
THD+N	<0.05% @ 1 kHz at 3 dB below clipping
S/N Ratio	>103 dBA, 20 Hz to 20 kHz
Channel Separation	>70 dB
Input Sensitivity	1.29 Vrms, +4 dBu (balanced) for full rated output power
Fault Protection	Over Current: Protects each channel individually against an excessive speaker load or shorted speaker line DC Offset: Protects each channel and speaker line against DC voltages sensed at each output Over Temperature: Protects the amplifier power supply and each channel against overheating due to poor ventilation or excessive temperature Under Voltage: Protects the amplifier if the internal power supply voltage is below tolerance due to excessive output levels or insufficient line voltage; Note: All faults report to the control system, and indicate on the front panel and in the software tool.
Output Relays	Disconnects the speaker line at each output under fault conditions, and during startup and shutdown
Audio Ramp	Ramps each channel’s audio level to its last setting after the corresponding output relay has closed following startup or fault recovery; ramp time 130 milliseconds
Connectors
LINE INPUTS 1 & 2	(2) 3-pin 3.5 mm detachable terminal blocks; Balanced line-level audio inputs; Maximum Input Level: 12.3 Vrms, +24 dBu; Input Impedance: 20k Ohms balanced
SPEAKER OUTPUTS 1 & 2	(2) 2-pin 7.62 mm reversed gender 20A detachable terminal blocks; Power amplifier outputs; Wire Size: Terminals accept up to 12 AWG (3.31 mm²); Note: Output is direct-coupled in all modes for all load types, not transformer isolated
LAN	(1) 8-pin RJ45 female; 10Base-T/100Base-TX Ethernet LAN port
100-240V~ 50/60Hz 4A-2A	(1) IEC 60320 C14 main power inlet; Mates with removable power cord (included)
G	(1) 6-32 screw; Chassis ground lug
COMPUTER (front)	(1) USB Type B female; USB computer console port (for setup only)
Controls & Indicators
PWR	(1) Bi-color green/amber LED, indicates operating power supplied from AC line power, amber indicates startup in progress, green indicates normal operation and a connection to the LAN, alternating green/amber indicates absence of a network connection
RESET	(1) Recessed pushbutton, restores last saved settings
STATUS, FAULT 1 & 2	(2) Red LEDs, each indicates a fault on the corresponding channel with specifics indicated below
STATUS, CURRENT 1 & 2	(2) Blue LEDs, each indicates an over-current fault condition on the corresponding output
STATUS, DC 1 & 2	(2) Blue LEDs, each indicates a DC offset fault condition on the corresponding channel
STATUS, THERM 1 & 2	(2) Blue LEDs, each indicates an over-temperature fault condition on the corresponding channel
STATUS, 70V-100V 1 & 2	(2) Blue LEDs, each indicates the corresponding channel is configured for 70 Volt / 100 Volt operation
VU 1 & 2	(2) 5-segment LED bar graph audio level meters for each corresponding output; each contains (4) blue LEDs for -40dB, -30dB, -20dB, and -10dB, and (1) red LED for CLIP
LINE INPUTS 1 & 2 (rear)	(2) Screwdriver-adjustable rotary controls, each adjusts the input attenuation level for the corresponding channel
LAN (rear)	(2) LEDs, green LED indicates Ethernet link status, amber LED indicates Ethernet activity
SETUP (rear)	(1) Red LED and (1) pushbutton for Ethernet setup, flashes while updating firmware
Power Switch (rear)	(1) Rocker switch, turns main power on or off
Circuit Breaker Reset (rear)	(1) Push button switch, resets 10A circuit breaker
Power
Main Power	4-2 Amps @ 100-240 Volts AC, 50/60 Hz, 10 Amps max.
Input Power	300 Watts
Power Consumption	300 Watts, all channels driven at 1/8th output power; 50 Watts @ 120VAC / 60 Watts @ 230VAC, all channels idle
Environmental
Temperature	41° to 104°F (5° to 40°C)
Humidity	10% to 90% RH (non-condensing)
Heat Dissipation	1025 BTU/hr, all channels driven at 1/8th output power; 240 BTU/hr, all channels idle
Construction
Chassis	Metal, variable-speed fan-cooled, vented sides
Front Panel	Metal, black finish with polycarbonate label overlay
Mounting	Freestanding or 1 RU 19-inch rack-mountable (front rack ears and rear support brackets included)
Dimensions
Height	1.72 in (44 cm)
Width	17.28 in (439 mm); 19.00 in (483 mm) with rack ears
Depth	14.59 in (371 mm)
Weight
13.7 lb (6.2 kg)
Compliance
UL 60065, FCC Class A commercial use