Performance

Note: Testing performed at 208V AC into resistive loads as specified. 7796HC accuracy was measured when driven into a 10 ohm load with between 0.1V DC and 6V DC or between 0.2V AC and 5V AC presented at its inputs. Performance reported is typical into the specified load up to 20 kHz frequency levels. Performance may be affected when operating into highly reactive loads or above 20 kHz, reducing maximum voltage, current and power output. 7794HC amplifiers can operate from 208V AC ±10%. Since these amplifiers have an unregulated power supply, low line conditions may slightly affect the maximum voltage potential.

Frequency Response, DC - 30 kHz (1 watt into 8 ohms): +0.1 to -0.5 dB
Maximum Continuous Output Power: 2550 watts RMS
Slew Rate: >35 V/µs
Residual Noise, 10 Hz to 20 kHz: Less than 250 µV (<0.25 mV)
THD (DC - 20 kHz): Less than 0.25%
Output Offset: Less than ±200 µV
Output Offset Current: Less than 10 mA DC
DC Drift,
   From Cold to Maximum Operating Temperature: ±400µV
   After 20 minutes of Operation: ±200µV
Output Impedance: 3.2 mOhm in Series with 2.2 µH
Phase Response (10 Hz - 10 kHz) : ±8.3 degrees
Unit to Unit Phase Error: ±0.1 degrees at 60 Hz
Input Characteristics,
   Balanced with ground: Three-terminal barrier block connector, 20 kΩ differential
   Unbalanced: BNC connector, 10 kΩ single-ended
Gain, Voltage Mode: 20 volts/volt;  Current Mode: 20 amperes/volt
Gain Linearity (over input signal, from 0.2V to 5V),
   DC: 0.0125%
   AC: 0.030%
Max Input Voltage: ±10V, balanced or unbalanced
Input Impedance: 20 kΩ differential
Input Sensitivity: 3.0V input for 3800W output into 1 ohm (adjustable)
Common Mode Rejection Range: -±11 VDC maximum
Common Mode Rejection Ratio:  Better than 70 dB

Status Display, Control, I/O

Front Panel LED Displays indicate: Ready, Standby, Fault
Soft Touch Switches for: Run, Stop, Reset
LCD Display: Can be configured for up to four simultanteous displays report one, two, or all four of the following: Vp, VRMS, Ap, ARMS
Back Panel Power Connection: NEMA-style locking receptacle; matching AC connector also included
Signal Output:4-position terminal barrier block (OUTPUT / COMMON / SAMPLED COMMON / CHASSIS GROUND); resistor installed between SAMPLED COMMON AND CHASSIS GROUND is a 2.7-ohm, 2W, 5%, metal-oxide resistor
Signal Input: User Selectable BNC or Barrier Strip, Balanced or Unbalanced
Interlock Connector: 25-pin D-sub connector used for amplifier control and status applications; also used in multi-amplifier applications

Communication Capabilities

Current Monitor: 20A/V ± 1%; 10A/V ± 1% (differential configuration)
Reporting: System Fault, Over Temp, Over Voltage, Over Load
Remote Control via Interlock Connector: Force to Standby, Reset after a fault

Protection

Over/Under Voltage:
± 10% from specified supply voltage amplifier is forced to Standby
Over Current:
Breaker protection on both main power and low voltage supplies
Over Temperature:
Separate output transistor, heat sink, and transformer temperature monitoring and protection

Physical Characteristics

Chassis:
The amplifier is designed for stand- alone or rack-mounted operation. The chassis is aluminum with a black powder-coat finish. The unit occupies five EIA 19-inch-wide units.
Weight: 153 lbs (69 kg), Shipping 168 lbs (76.2 kg)
AC Power: Three-phase, 208 VAC (±10%), 47-60 Hz, 30A AC service; (400 VAC (±10%), 15A model available)
Operating Temperature:
10°C to 50°C (50°F to 122°F), maximum output Power de-rated above 30°C (86°F).
Humidity: 70% or less, non-condensing
Cooling: Forced air cooling from front to back through removable filters via six 100ft3/min. fans. No space is required between rack-mounted amplifiers. Air filters are removeable from the rear via one fastener per side and may be eliminated if cabinet filtration is provided.
Dimensions (HxWxD):  12.25” x 19” x 22.8” (31.3 cm x 48.3 cm x 57.9 cm )