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Power| continuous power per channel into 8 ohms | 100 watts |
|---|---|
| continuous power per channel into 4 ohms | 150 watts |
| power consumption quiescent | 96 VA |
| maximum power consumption | 1440 VA |
| power consumption at 100 watts into 8 ohms | 1165 VA |
| power supply voltage | 115 VAC - 50/60 Hz |
Distortion| IM distortion SMPTE at 8 ohms | ≤ 0.075% |
|---|---|
| IM distortion SMPTE at 4 ohms | ≤ 0.075% |
| IM distortion CCIF at 8 ohms | ≤ 0.025% |
| IM distortion CCIF at 4 ohms | ≤ 0.025% |
| THD + noise at 100 watts into 8 ohms at 20Hz | 0.0012% |
| THD + noise at 100 watts into 8 ohms at 1kHz | 0.0012% |
| THD + noise at 100 watts into 8 ohms at 10kHz | 0.02% |
| THD + noise at 100 watts into 8 ohms at 20kHz | 0.025% |
| THD + noise at 150 watts into 4 ohms at 20Hz | 0.025% |
| THD + noise at 150 watts into 4 ohms at 1kHz | 0.025% |
| THD + noise at 150 watts into 4 ohms at 10kHz | 0.035% |
| THD + noise at 150 watts into 4 ohms at 20kHz | 0.045% |
Performance| frequency response at 1 watt into 8 ohms | +0, -0.25 dB |
|---|---|
| power bandwidth | 1.5 Hz to 65 kHz |
| dynamic headroom into 4 ohms | 2.5 dB |
| signal to noise ratio | ≥ 110 dB |
| gain | 29 dB |
| input sensitivity for 1 watt | 0.1 volts |
| input sensitivity for 100 watts | 1.0 volts |
| input impedance | 50 kΩ |
| damping factor | ≥ 400 |
| rise time | 4.5 µS |
Weight and Dimensions| chassis dimensions | 5” (127mm) x 17” (432mm) x 14” (355.6mm) |
|---|---|
| maximum dimensions | 5 3/4” (146mm) x 17” (432mm) x 15” (381mm) |
| weight | 42 lb. (19.1 kg) |
| packed weight | 48 lb. (22.8 kg) |
Crucial warnings about electric shock risks and the prohibition of opening the unit.
Guidelines for safe placement of outdoor antennas away from power lines for shock prevention.
Detailed instructions for grounding outdoor antennas to protect against voltage surges and static.
Specific instructions for CATV installers regarding proper building grounding per NEC.
Congratulatory message and introduction to the ADCOM GFA-7400/7300 amplifiers.
Details on the ADCOM Limited Warranty and requirements for proof of purchase.
Key features and technical highlights of the ADCOM GFA-7400 5-channel power amplifier.
Key features and technical highlights of the ADCOM GFA-7300 5-channel power amplifier.
Instructions for unpacking the amplifier and inspecting it for any shipping-related damage.
Guidelines for positioning the amplifier to ensure proper airflow and prevent overheating.
Visual diagram showing how to connect speakers and surround processors to the amplifier.
Explanation of the Left/Right and Front/Rear channel naming conventions for connections.
Detailed guide for using RCA cables to connect audio sources to the amplifier's inputs.
Instructions for connecting speakers to binding posts, including polarity and cable types.
Information on driving low-impedance speakers and using speaker selectors for system expansion.
Proper methods for cleaning the amplifier's chassis and front panel to maintain its finish.
Diagram and description of all connectors found on the rear panel of the amplifier.
Details on RCA inputs and gold-plated binding post outputs, including connector compatibility.
Explanation of the 12VDC trigger feature for remote power control on the GFA-7400.
Information on AC fuse types, ratings, and safe replacement procedures with warnings.
Step-by-step instructions for safely replacing fuses in both the GFA-7400 and GFA-7300 models.
Guidelines for using the polarized AC power cord to ensure safety and minimize hum.
How to operate the power switch to turn the amplifier on and off correctly.
Explanation of the Power LED's function, including its behavior during operation and shutdown.
Details on the thermal protection circuit, its triggers, and how it affects amplifier operation.
Meaning of the Distortion Alert LEDs and guidance on reducing volume to prevent damage.
A table listing common symptoms, potential causes, and solutions for amplifier problems.
Explanation of common audio hum issues and the concept of ground loops.
Steps to identify and resolve hum issues related to Cable TV connections using isolators.
Troubleshooting hum by adjusting component spacing and testing RCA cables individually.
Information on how to contact ADCOM's Technical Service Department for assistance and advice.
Guidelines for shipping the amplifier for service, including packaging and prior authorization requirements.
Detailed specs for power output, IM distortion, THD+Noise, and frequency response.
Specs on headroom, S/N ratio, gain, input sensitivity, impedance, damping factor, and rise time.
Specifications for chassis dimensions, maximum dimensions, weight, and power consumption.
Detailed specs for power output, IM distortion, and THD+Noise for the GFA-7300.
Specs on headroom, S/N ratio, gain, input sensitivity, impedance, damping factor, and rise time.
Specifications for chassis dimensions, maximum dimensions, weight, and power consumption.
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