{"product_id":"bobs-devices-sky-40s-step-up-transformer","title":"Bob's Devices SKY 40-S Step-Up Transformer","description":"\u003ch1\u003eBob's Devices SKY 40-S Step-Up Transformer\u003c\/h1\u003e\n\u003ch3\u003eSwitchable 1:20 \/ 1:40 MC step-up with heavier core and refined winding. Handcrafted in the USA\u003c\/h3\u003e\n\u003cp\u003eBob's Devices SUTs are hand-made, one at a time, using point-to-point wiring and are individually tested. No circuit boards are used. The SKY 40-S runs passively, adds no noise, and is designed for highly resolving analog systems.\u003c\/p\u003e\n\u003cp\u003eThe SKY 40-S is an upgrade from the SKY 40. It is heavier and uses a meatier core material, resulting in a slightly taller transformer than the original. Says Bob's Devices, \"It was hard to upgrade the SKY 40. We tried many combinations and found that by increasing the weight and length of the core, we could also change the winding scheme to reduce capacitance. You will 'Hear the Magic.'\"\u003c\/p\u003e\n\u003cp\u003eThe SKY 40-S has the same ratios as the original: 1:20 in low and 1:40 in high. If your system is particularly revealing, you will notice improved dynamics, bandwidth, and clarity, along with the same black powder-coated cast-aluminum enclosure with laser-etched lettering.\u003c\/p\u003e\n\u003ch4\u003eSUT with MM Phono Vs. MC Phono\u003c\/h4\u003e\n\u003cp\u003eMost moving-coil phono preamps add an extra gain stage to boost the tiny MC signal up to moving-magnet level, but that almost always raises noise and compromises sound. That's a lot of gain needed on a very delicate signal.\u003c\/p\u003e\n\u003cp\u003eA Bob’s Devices step-up transformer (SUT) avoids those trade-offs: it’s passive, silent, and purpose-built to match your specific MC cartridge to any MM phono input.\u003c\/p\u003e\n\u003cp\u003eInstead of dealing with switches, jumpers, and noise level inside an all-in-one preamp, you get the cleanest signal path, better cartridge matching, and a lower noise floor.\u003c\/p\u003e\n\u003cp\u003eIf you want your MC cartridge to deliver everything it’s capable of—clarity, dynamics, and a quieter background—you’ll get it with a dedicated Bob’s Devices SUT.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ch4\u003eTransformers\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eLamination\/Core:\u003c\/strong\u003e Heavier core material optimized for low-level performance\u003c\/p\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eStep-Up Ratios (Low, High):\u003c\/strong\u003e 1:20, 1:40\u003c\/p\u003e\n\u003ch4\u003eConnectivity\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eInputs\/Outputs:\u003c\/strong\u003e Choose from RCA and XLR\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrounding:\u003c\/strong\u003e Ground post with Ground\/Lift toggle\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSwitching Hardware:\u003c\/strong\u003e Premium silver-contact toggles for Gain and Ground\u003c\/p\u003e\n\u003ch4\u003eConstruction\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eEnclosure:\u003c\/strong\u003e Hand-polished black powder-coated cast-aluminum; laser-etched labeling\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWiring:\u003c\/strong\u003e Point-to-point; no PCBs\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacture:\u003c\/strong\u003e Hand-built in the USA\u003c\/p\u003e","brand":"Bob's Devices","offers":[{"title":"RCA to RCA","offer_id":52177896145080,"sku":"BD-SKY40S-RCA","price":1695.0,"currency_code":"USD","in_stock":true},{"title":"RCA in \/ XLR out","offer_id":52177896177848,"sku":"BD-SKY40S-RCA\/XLR","price":1695.0,"currency_code":"USD","in_stock":true},{"title":"XLR to XLR","offer_id":52177896210616,"sku":"BD-SKY40S-XLR","price":1695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/935314_97ade2aef33343c9884061dba1132202_mv2.png?v=1763572615","url":"https:\/\/upscaleaudio.pro\/products\/bobs-devices-sky-40s-step-up-transformer","provider":"Upscale Audio","version":"1.0","type":"link"}