{"product_id":"accuphase-c-57-phono-preamplifier","title":"Accuphase C-57 Phono Preamplifier","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\n\u003ch2\u003eC-57 At A Glance\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTopology:\u003c\/strong\u003e Fully balanced phono preamplifier, monaural construction left and right\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMC head amplifier:\u003c\/strong\u003e First Accuphase phono stage with ANCC (Active Noise Cancelling Circuit) on the MC head amp\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e Three standard phono inputs plus one dedicated balanced XLR MC input\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMC loading positions:\u003c\/strong\u003e Seven settings — 10 \/ 30 \/ 60 \/ 100 \/ 200 \/ 300 \/ 1,000 ohms (the 60-ohm position is new for the C-57)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMM loading positions:\u003c\/strong\u003e Three settings — 1 \/ 47 \/ 100 kilohms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput-referred noise:\u003c\/strong\u003e –156 dBV (1 dB lower than the C-47 it succeeds)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRIAA accuracy:\u003c\/strong\u003e ±0.3 dB across the audio band\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e Balanced (XLR) and unbalanced (RCA) line-level outputs with polarity selector\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFiltering:\u003c\/strong\u003e Switchable subsonic filter; gain selector for low-output cartridges\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Glass-cloth fluorocarbon-resin PCBs; gold-plated copper traces; low-noise regulated power supply with toroidal transformer; high-carbon cast-iron isolator feet\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe C-57 is the fourth generation of Accuphase's standalone phono preamplifier — a line that began with the C-27 in 2008 and progressed through the C-37 and C-47 — and is the most consequential generational step the company has made in this category. The C-57 is the first phono stage in the Accuphase catalog to apply ANCC, the company's Active Noise Cancelling Circuit, directly to the MC head amplifier. The result is an input-referred noise figure of –156 dBV, one decibel quieter than the C-47, which is a meaningful margin at the bottom of a phono signal chain where every dB of noise is a dB of lost low-level detail.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFully balanced from input to output.\u003c\/strong\u003e The C-57 is built monaurally — separate left and right amplifier blocks, separate power supply circuits, separate filtering — with a fully balanced signal path from the cartridge clips through to the XLR output. For owners of cartridges with separated ground returns, the dedicated balanced XLR MC input allows a true balanced connection from the tonearm cable into the preamplifier, eliminating a common-mode noise path that an RCA-only phono stage cannot address.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFour input positions, independently configured.\u003c\/strong\u003e The C-57 provides three standard phono inputs plus the dedicated balanced MC input, for four total. Each input remembers its own cartridge configuration: MC or MM, load impedance, gain, and subsonic-filter state. A listener running a single arm with two cartridges, or a system with two turntables, switches between cartridges by switching inputs — no menu diving, no rear-panel re-jumpering, no re-loading every time the cartridge changes.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe new 60-ohm MC loading position.\u003c\/strong\u003e Accuphase's earlier phono stages offered 30, 100, and 300 ohms among their MC loadings. The C-57 adds a 60-ohm position, bridging what had been the widest gap in the load-impedance table. For modern moving-coil cartridges that fall between the classic 100-ohm load and the lower 30-ohm load — an increasingly common region of the market as cartridge designers refine internal-impedance figures — the 60-ohm position is the precise match that earlier C-series phono stages required a workaround to provide.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eEqualization accuracy and quiet running.\u003c\/strong\u003e The RIAA equalizer is held to ±0.3 dB across the audio band — the tightest specification Accuphase publishes for its phono stages — using glass-cloth fluorocarbon-resin printed circuit boards with low dielectric loss. The power supply is a regulated low-noise design with a dedicated toroidal transformer; vibration is managed by Accuphase's high-carbon cast-iron isolator feet. A 7-segment LED indicator on the front panel displays the active load impedance so the listener can confirm at a glance which configuration each input is set to.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhere the C-57 sits in the line.\u003c\/strong\u003e The C-57 is the standalone phono stage for owners of the C-2300, C-2900, or C-3900S line preamplifiers who want a dedicated chassis for vinyl — or for owners of any high-end line preamplifier from another manufacturer who want an Accuphase-grade phono stage to feed it. Customers running an Accuphase integrated amplifier with an AD-60 phono board, or a C-2900 with the AD-2900 phono module, already have an excellent phono stage in their existing chassis; the C-57 is the next step up — a separate, isolated, monaurally constructed phono stage with its own power supply and chassis.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/www.accuphase.com\/model\/c-57.html\" target=\"_blank\" rel=\"noopener\"\u003eClick here for more information!\u003c\/a\u003e\u003c\/p\u003e\n","brand":"Accuphase","offers":[{"title":"Default Title","offer_id":48803413590235,"sku":null,"price":13975.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1363\/6553\/files\/c57_insidefront_568c296e-4309-47a0-97e5-34c8d66c177a.png?v=1779595980","url":"https:\/\/almaaudio.com\/products\/accuphase-c-57-phono-preamplifier","provider":"Alma Music and Audio","version":"1.0","type":"link"}