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The Auditorium 23 A23 SUT is a specialized step-up transformer created by Keith Aschenbrenner to complement the Denon DL-103 MC cartridge. It offers a voltage gain of approximately 20:1 and loads the DL-103 at about 118 ohms, optimizing the cartridge's output for standard phono preamps. The transformer is known for refining the sound of the DL-103 by maintaining its robust bass and weight while enhancing the clarity, precision, and transparency of the midrange and treble. It is praised for producing a crystalline sound with greater detail and a polished treble, making vinyl playback more vivid and lifelike. The A23 SUT is considered a must-have for audiophiles using the Denon 103 or similar low-output MC cartridges, delivering a more refined and dynamic listening experience compared to typical step-up devices.
Analog signal output specifications
Phono stage specifications
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The One-to-Ten's mc gain is 20 dB against the A23 SUT for Denon 103's 26.02 dB, its output impedance 0.1Ω against 118Ω, and its cartridge type LOMC against HOMC.
Both turn up in the same documented systems.
The Hommage T1's mc gain is 29 dB against the A23 SUT for Denon 103's 26.02 dB, its output impedance 3Ω against 118Ω, and its cartridge type MC against HOMC.
Both turn up in the same documented systems.
The Copper Step-Up Transformer's mc gain is 20 dB against the A23 SUT for Denon 103's 26.02 dB, its output impedance 37Ω against 118Ω, and its cartridge type MC against HOMC.
The MC1 Moving Coil Transformer (SUT)'s mc gain is 22 dB against the A23 SUT for Denon 103's 26.02 dB and its output impedance 70Ω against 118Ω.
Standard SUT
Step Up Transformer
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