Description
? ADCOM GFA-7500 5 CHANNEL THX Power Amplifier EXCELLENT ?? ADCOM GFA 7500 5 CHANNEL THX Power Amplifier EXCELLENT ?? ADCOM GFA7500 5 CHANNEL THX Power Amplifier EXCELLENT ? Five-Mono-Amplifier having 5 individual mono amplifier modules that can be driven simultaneously This amplifier is in wonderful condition overallAll original paint and finishSome scuffs - see circled areas in last picRest of the body is in fab shapeSolid 8.5 out of 10 This listing is for 1 single amplifier unit Fully tested, runs fine cold, runs fine fully warmed up, bench tested for daysSolid amp having five independent channel boards/circuits run off one immense toroidal transformerRun four of any five channels for bi amplified setupsRun all five channels for surroundThis unit is only for 120VAC 50/60Hz This description here is accurate and I approve of this message Shipped fully insured with trackingUnit is about 60 pounds net, 70 pounds ship weight Let me know if you have any questionsCheers _-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ From interwebs...... RMS Power Per Channel @ 8ohm 150WRMS Power Per Channel @ 4ohm 225WTHD (Total Harmonic Distortion) 0.08 %Frequency Response 20Hz-20kHzAudio Snr 115dBThe Adcom GFA-7500 amplifier, with an RMS power of 225W at 4 ohms, plays loud and clean music. With a frequency response of 20 Hz - 20 kHz, this Adcom amplifier plays a wide range of frequencies. Having an audio SNR ratio of 115 dB, this 5-channel amplifier discards unwanted signals, providing clean audio. The total harmonic distortion of this Adcom amplifier is 0.08 %, giving clean audio at all volume levels. The five mono-amplifier design of this 5-channel amplifier prevents inter-channel cross-talk, maintaining sonic integrity. GFA-7500Todays highly dynamic multi-channel movie soundtracks demand more than conventional home audio systems can deliver. Thats why ADCOM developed its second generation THX-certified GFA-7500 power amplifier.To earn THX certification, an amplifier must deliver clean, powerful sound effects, clear dialogue and dramatic musical scores under all room and speaker-load conditions. In fact, Lucas Films THX uses these amplifiers in their own studios for mixing the audio of THX certified home releases. But ADCOMs engineers went further than the stringent requirements of THX and created a home theater power amplifier that meets the demands of the most critical audiophiles as well.The GFA-7500s five separate mono modules each produce 150 watts into 8 ohms and over 225 watts into 4 ohms from all five channels-- with all FIVE channels being driven simultaneously!! This five-mono-amplifier design guarantees the sonic integrity of each channel by completely eliminating any inter-channel cross-talk and ensuring full-power with minimal distortion from each individual channel, regardless of speaker impedance or efficiency. Since the theatrical sound mix for multi-channels will often place very different demands on the speakers for each channel, the ability to essentially treat them as separate from the amplifiers perspective delivers the maximum impact the films sound engineers intended.The GFA-7500 features a heavy-duty, twenty pound toroidal power transformer that delivers 2500 watts through five separate secondary taps. In addition, the120,000mF total storage capacitance bank easily delivers the large amounts of current demanded by todays power-hungry, low-impedance THX speaker systems. This oversized and generous power supply allows maximum power output over a wide and unrestricted dynamic range needed by the ever-increasing number of digital audio and audio/video recordings. With all this power ADCOM also wanted reliability and good sonics. To that end, a special protection circuit constantly monitors the 7500s operating parameters, yet its completely outside the signal path so it wont compromise sound quality. Matched output devices for each channel help deliver the superb sound reperoduction expected of an ADCOM.And because ADCOM designs products for tomorrow as well as today, the GFA-7500 has been designed to meet all the new 5.1 channel format requirements, including Dolby Digital (AC-3) and DTS, with full-bandwidth response down to the lowest frequencies.You can be sure, whether youre listening to movies or music, the GFA-7500 is the perfect choice for any stereo or multi-channel home theater system, especially if you want the movies you play at home to sound as live and exciting as their filmmakers intended. Leave it to ADCOM - two thumbs up for performance and value in cinema type sound. ADCOM GFA-7500 Power Amplifier - SPECIFICATIONSPower Rating (To FTC Requirements) 150 watts per channel continuous average power into 8 ohms 225 watts per channel continuous average power into 4 ohms Any frequency with all channels driven at less than 0.075% THD IM Distortion (SMPTE) l watt to l50 watts into 8 ohms.......<0.05% 1 watt to 225 watts into 4 ohms.....<0.05% IM Distortion (CCIF, Any Combination from 4kHz to 20kHz) 150 watts into 8 ohms.....<0.01% 225 watts into 4 ohms.....<0.01% THD + Noise at 150 watts into 8 ohms (Typical) 20Hz.........0.006% 1 kHz........0.006% 10 kHz......0.02% 20 kHz......0.04% THD + Noise at 225 watts into 4 ohms (Typical) 20 Hz........0.01% 1khz..........0.01% 10 kHz......0.035% 20 kHz......0.065% Frequency Response at 1 watt into 8 ohms (10Hz to 20kHz) ...........+ 0, - 0.25dB Power Bandwidth (-3dB) ...........1.5Hz to 100kHz Dynamic Headroom Into 4 ohms ...........1.9dB Signal to Noise Ratio, A Weighted (150 watts into 8 ohms) ...........> 115B Gain .......29dB Input Sensitivity for 1 Watt output..........0.1 volts for 150 Watts output....1.14 volts Input Impedance .........50K ohms Damping Factor ( 20Hz to 20kHz ) ........>800 Rise Time (5kHz, 90 V, peak-to-peak square wave, 20% to 80%) ........2.7 microseconds (uS)Power Consumption (Continuous, All Channels Driven) .....Quiescent.....80VA .....Maximum.....1440VA .....150 watts into 8 ohms.....1375VAGeneral Power (Available in 230VAC by special order) .....115VAC - 50/60Hz Chassis Dimensions .....7.25 x 17 x 15 (184.15mm) x (432mm) x (381mm) Maximum Dimensions .....6.875 x 17 x 14 (174.625mm) x (432mm) x (355.6mm) Weight .....56 lbs. ( 25.4 kg ) Weight Packed .....64 lbs. ( 29.1 kg ) Specification subject to change without notice.
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