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Audio Innovations 500: same mains transformer for 115V and 230V?

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Posted on October 26, 2020 at 19:10:54
James Romeyn
Dealer

Posts: 148
Location: Cache Valley, UT
Joined: November 24, 2000
In the 90s I bought a USA/115V AI Series 500, early version with 3 output taps. I sold it and consider buying one from Europe where they are more common.

Do 115V and 230V S500 share the same mains transformer? IOW, is the only difference internal wiring and rear panel label indicating mains voltage?

Q concerns only early amps with 4/8/16 ohm taps; later amps had different output trans w/only 4/8 ohm taps.

TX!

 

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RE: Audio Innovations 500: same mains transformer for 115V and 230V?, posted on October 26, 2020 at 21:25:45
Eli Duttman
Audiophile

Posts: 10356
Location: Monroe Township, NJ
Joined: March 31, 2000
The $64 question is are dual primaries that can be connected either in parallel (for "120" VAC) or in series (for "240" VAC) present. I don't know.


Eli D.

 

RE: Audio Innovations 500: same mains transformer for 115V and 230V?, posted on November 6, 2020 at 21:43:07
James Romeyn
Dealer

Posts: 148
Location: Cache Valley, UT
Joined: November 24, 2000
Thank you Eli! Indeed, the schematic displays 4 primary sections labeled 100V, 20V, 100V and 20V. Thank you for clarifying the 120V wiring method.

Peter Qvortrup of Audio Note designed the AI500; AN confirmed AI500 employs the same transformer for 120V and 240V.

 

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