AI-generated product photo — not official manufacturer imagery.
1:20/1:40 SUT
Bob's DevicesEstimated price (community-sourced)
Around — community and catalog average, updates slowly
About the 1:20/1:40 SUT
Bob’s Devices 1:20/1:40 SUT is a hand-built, passive step-up transformer for low-output moving-coil phono cartridges. It raises the cartridge signal so it can feed a phono preamplifier’s moving-magnet input. The 1:20 and 1:40 ratios provide two gain choices; the manufacturer’s CineMag 1131 version is described as using CineMag CMQEE-1131 “Blue” transformers, point-to-point wiring, gold-plated RCA hardware, and a ground/lift switch in a black powder-coated cast-aluminum enclosure. Bob’s Devices currently lists products with 1:20/1:40 ratios, including the SKY 40 and SKY 40-S. The exact product name can refer to different transformer versions, so details such as core and enclosure may vary by version.
Specifications
Phono Preamplifier
Phono stage specifications
- MM Gain
- 26 dB
- MC Gain
- 32 dB
- Adjustable Loading
- No
- Adjustable Capacitance
- No
Never published
- Analog Output — the maker never published this. Checked 15 sources on 16 Oct 2026
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions