JVC - A-X55 'Dynamic Super-A' Solid state integrated amplifier
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Description from the seller
The JVC A-X55 (also known as the Victor A-X55) is a high-quality vintage integrated stereo amplifier, manufactured in Japan between 1982 and 1984. The model is notable for JVC’s signature "Dynamic Super A" amplifier circuitry—a technique that combines the sound quality of a Class A amplifier with the efficiency of a Class B design, while eliminating switching distortion.
Key technical specifications and features, according to official documentation from HiFi Engine and Hifi-Wiki, include:
Key Specifications
• Power Output: 70 watts per channel into 8Ω (stereo) (some measurements report up to 80–83 watts of continuous power). 2x 100W @ 4 Ohms (read note)
• Frequency Response: Extremely wide, ranging from 1Hz to 300kHz.
• Total Harmonic Distortion (THD): Only 0.007% at rated power.
• Damping Factor: 150 (at 1 kHz, 8 ohms), ensuring very tight control over the loudspeakers.
• Signal-to-Noise Ratio: 110dB (Line), 86dB (MM), 70dB (MC).
• Weight: 10 kg.
• Dimensions: 435 x 140 x 404 mm.
Special Features
• Advanced Phono Preamplifier: Equipped with a J-FET high-quality MM (Moving Magnet) and MC (Moving Coil) phono stage, ideal for vinyl enthusiasts who wish to use various types of turntable cartridges.
• Isolated drive circuit: Utilizes an isolated drive circuit and a waveform-processing unit to eliminate dynamic interference between the input and output stages.
• Concealed controls: Secondary functions (such as bass and treble tone controls, a subsonic filter, and loudness) are neatly tucked away behind a hinged front panel (sealing pocket) on the front of the unit.
Tested fully okay.
All lamps work
Set to 240V
Pictures are description, signs of use on the sides.
Insured shipping
Note: Although JVC emphasizes specifications at 8 Ohms in its official documentation (delivering 70 to 83 watts per channel with high stability and extremely low distortion), the amplifier is built with sufficient power transistors to handle 4-Ohm speakers if there is enough free flow for cooling at high volumes.
When connecting, please note the following important points:
• Only one pair of speakers: If you are using 4-Ohm speakers, you may connect a maximum of one pair (i.e., either to the 'Speakers A' terminals or the 'Speakers B' terminals only). Not 2 pairs.
Seller's Story
With a passion for technology and sound, we offer a varied selection, mainly of analog audio equipment, for every budget. Everything is checked, tested, cleaned, and usually refurbished as well. Shipping in sturdy packaging and pickup is always possible near Hoorn/Alkmaar.
Translated by Google TranslateThe JVC A-X55 (also known as the Victor A-X55) is a high-quality vintage integrated stereo amplifier, manufactured in Japan between 1982 and 1984. The model is notable for JVC’s signature "Dynamic Super A" amplifier circuitry—a technique that combines the sound quality of a Class A amplifier with the efficiency of a Class B design, while eliminating switching distortion.
Key technical specifications and features, according to official documentation from HiFi Engine and Hifi-Wiki, include:
Key Specifications
• Power Output: 70 watts per channel into 8Ω (stereo) (some measurements report up to 80–83 watts of continuous power). 2x 100W @ 4 Ohms (read note)
• Frequency Response: Extremely wide, ranging from 1Hz to 300kHz.
• Total Harmonic Distortion (THD): Only 0.007% at rated power.
• Damping Factor: 150 (at 1 kHz, 8 ohms), ensuring very tight control over the loudspeakers.
• Signal-to-Noise Ratio: 110dB (Line), 86dB (MM), 70dB (MC).
• Weight: 10 kg.
• Dimensions: 435 x 140 x 404 mm.
Special Features
• Advanced Phono Preamplifier: Equipped with a J-FET high-quality MM (Moving Magnet) and MC (Moving Coil) phono stage, ideal for vinyl enthusiasts who wish to use various types of turntable cartridges.
• Isolated drive circuit: Utilizes an isolated drive circuit and a waveform-processing unit to eliminate dynamic interference between the input and output stages.
• Concealed controls: Secondary functions (such as bass and treble tone controls, a subsonic filter, and loudness) are neatly tucked away behind a hinged front panel (sealing pocket) on the front of the unit.
Tested fully okay.
All lamps work
Set to 240V
Pictures are description, signs of use on the sides.
Insured shipping
Note: Although JVC emphasizes specifications at 8 Ohms in its official documentation (delivering 70 to 83 watts per channel with high stability and extremely low distortion), the amplifier is built with sufficient power transistors to handle 4-Ohm speakers if there is enough free flow for cooling at high volumes.
When connecting, please note the following important points:
• Only one pair of speakers: If you are using 4-Ohm speakers, you may connect a maximum of one pair (i.e., either to the 'Speakers A' terminals or the 'Speakers B' terminals only). Not 2 pairs.
Seller's Story
With a passion for technology and sound, we offer a varied selection, mainly of analog audio equipment, for every budget. Everything is checked, tested, cleaned, and usually refurbished as well. Shipping in sturdy packaging and pickup is always possible near Hoorn/Alkmaar.
Translated by Google TranslateDetails
Era
1900-2000
Brand
JVC
Model
A-X55 'Dynamic Super-A'
Multiple models
No
Physical condition
Good
Number of objects
1
Includes
Power cord
Weight
10 kg
Functional condition
Tested and working/playable
Sold by
