Sony STR - GX90 Es Vintage Amplifier Stereo Receiver 120 Watts Per Channel Phono
Item History & Price
| Reference Number: Avaluer:589433 | Brand: Sony |
| Modified Item: No | Custom Bundle: No |
| Country/Region of Manufacture: Japan |
Sony STR-GX90 Es Vintage Amplifier Stereo Receiver 125 Watts Per Channel Totl. Similar to the str-gx10, top of the line , this one is as clean as an can be , not a scratch , has a phono section for mm and mc cartridges, apparently was not used much, I didn’t even need to dust it! Don’t miss it!
Sony STR-GX90ES FM-AM Stereo Receiver
Power output and total harmonic distortion:
With 8 ohm load, both channels driven, from 20-20, 000 Hz, rated 120 watts per channel minimum RMS... power, with no more than 0.008% total harmonic distortion from 250 milliwatts to rated output.
With 4 ohm load, both channels driven, from 20-20, 000 Hz, rated 120 watts per channel minimum RMS power, with no more than 0.015% total harmonic distortion from 250 milliwatts to rated output.
Amplifier SectionDynamic power output
160 watts + 160 watts (8 ohms at 1kHz IHF)220 watts + 220 watts (4 ohms at 1kHz IHF)350 watts + 350 watts (2 ohms at 1kHz IHF)
Harmonic distortion less than 0.008% at rated output
Frequency response
PHONO: RIAA equalization curve +/- 0.3dBCD, DAT, TAPE, VIDEO 1, 2, 3 (AUDIO), ADAPTOR: 20-20kHz +/- 0.3dB
Damping factor 60 (8 ohms, 1 kHz)
PHONO MMSensitivity: 2.5mVImpedance: 50 kilohmsS/N (weighting network, input level): 90dB, 80dB (A, 5mV)
PHONO MCSensitivity: 0.17mVImpedance: 100 ohmsS/N (weighting network, input level): 73dB, 84dB (A, 5mV)
CD, VIDEO (1), 2, TAPE, DAT, TAPE MONITORSensitivity: 150mVImpedance: 50 kilohmsS/N (weighting network, input level): 98dB, 85dB (A, 5mV)
POWER INSensitivity: 1.1 VImpedance: 50 kilohmsS/N (weighting network, input level): 120 dB (A, 5mV)
The STR-GX90 has a set of three tone controls which allow for fine-tuning with the use of selectable turnover levels. The manual states:
BASSResponse +/- 10dB at 100 Hz Turnover frequency: 400 HzResponse +/- 7.5dB at 100 Hz Turnover frequency: 200 Hz
MIDResponse +/- 6dB at 100 Hz Turnover frequency: -----------
TREBLEResponse +/- 10dB at 10 kHz Turnover frequency: 3 kHzResponse +/- 6dB at 10 kHz Turnover frequency: 6 kHz
Overall I find the tone controls to be pretty subtle unless they are maxed out. There is an impedance selector switch on the rear panel that I must check as I switch speakers.
DIMENSIONS
w 18 5/8 x h 6 3/8 x d 17 1/4 inches
Weight: 32 lbs (which is a little over two pounds heavier than the GX80ES, interestingly)
Some other details from the manual:
The STR-GX90ES is equipped with a copper-plate rear panel for reducing distortion in high frequencies.
Optical Legato Linear A system allows the receiver to operate automatically as a class A amplifier when the level is low and as a class B amplifier when the level is high without disturbing the signal. This minimizes total harmonic distortion at every sound stage. These receivers have a spontaneous twin drive power circuit. Condensers having large capacity are used independently for the voltage amplification drive stage of the class A and power output stage of class B. Thus, a stable output and high quality sound are obtained, resulting in exclusion from power interferences. The class A stage realizes a stable operation free from interference of the power stage even when an instantaneous or strong output is received.
Sony STR-GX90ES FM-AM Stereo Receiver
Power output and total harmonic distortion:
With 8 ohm load, both channels driven, from 20-20, 000 Hz, rated 120 watts per channel minimum RMS... power, with no more than 0.008% total harmonic distortion from 250 milliwatts to rated output.
With 4 ohm load, both channels driven, from 20-20, 000 Hz, rated 120 watts per channel minimum RMS power, with no more than 0.015% total harmonic distortion from 250 milliwatts to rated output.
Amplifier SectionDynamic power output
160 watts + 160 watts (8 ohms at 1kHz IHF)220 watts + 220 watts (4 ohms at 1kHz IHF)350 watts + 350 watts (2 ohms at 1kHz IHF)
Harmonic distortion less than 0.008% at rated output
Frequency response
PHONO: RIAA equalization curve +/- 0.3dBCD, DAT, TAPE, VIDEO 1, 2, 3 (AUDIO), ADAPTOR: 20-20kHz +/- 0.3dB
Damping factor 60 (8 ohms, 1 kHz)
PHONO MMSensitivity: 2.5mVImpedance: 50 kilohmsS/N (weighting network, input level): 90dB, 80dB (A, 5mV)
PHONO MCSensitivity: 0.17mVImpedance: 100 ohmsS/N (weighting network, input level): 73dB, 84dB (A, 5mV)
CD, VIDEO (1), 2, TAPE, DAT, TAPE MONITORSensitivity: 150mVImpedance: 50 kilohmsS/N (weighting network, input level): 98dB, 85dB (A, 5mV)
POWER INSensitivity: 1.1 VImpedance: 50 kilohmsS/N (weighting network, input level): 120 dB (A, 5mV)
The STR-GX90 has a set of three tone controls which allow for fine-tuning with the use of selectable turnover levels. The manual states:
BASSResponse +/- 10dB at 100 Hz Turnover frequency: 400 HzResponse +/- 7.5dB at 100 Hz Turnover frequency: 200 Hz
MIDResponse +/- 6dB at 100 Hz Turnover frequency: -----------
TREBLEResponse +/- 10dB at 10 kHz Turnover frequency: 3 kHzResponse +/- 6dB at 10 kHz Turnover frequency: 6 kHz
Overall I find the tone controls to be pretty subtle unless they are maxed out. There is an impedance selector switch on the rear panel that I must check as I switch speakers.
DIMENSIONS
w 18 5/8 x h 6 3/8 x d 17 1/4 inches
Weight: 32 lbs (which is a little over two pounds heavier than the GX80ES, interestingly)
Some other details from the manual:
The STR-GX90ES is equipped with a copper-plate rear panel for reducing distortion in high frequencies.
Optical Legato Linear A system allows the receiver to operate automatically as a class A amplifier when the level is low and as a class B amplifier when the level is high without disturbing the signal. This minimizes total harmonic distortion at every sound stage. These receivers have a spontaneous twin drive power circuit. Condensers having large capacity are used independently for the voltage amplification drive stage of the class A and power output stage of class B. Thus, a stable output and high quality sound are obtained, resulting in exclusion from power interferences. The class A stage realizes a stable operation free from interference of the power stage even when an instantaneous or strong output is received.
