{"product_id":"accuphase-a-300","title":"A-300 Mono Power Amplifier","description":"\u003cdiv class=\"pa-d5\" style=\"color:#080808;line-height:1.6;font-size:15px\"\u003e\n\u003cp style=\"margin:0 0 6px;font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:#8d1935;font-weight:600\"\u003eAccuphase · A Series\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;font-size:18px;line-height:1.45;font-weight:600\"\u003eThe A-300 is Accuphase's fiftieth-anniversary reference: a pure Class A monaural amplifier rated at 125 watts into 8 ohms that doubles to 250, 500 and 1,000 watts into 4, 2 and 1 ohm from twenty parallel push-pull MOS-FETs.\u003c\/p\u003e\n\u003cp style=\"display:inline-block;margin:0 0 18px;padding:4px 10px;border:1px solid #d8d5ce;border-radius:2px;font-size:13px;color:#55524c\"\u003ePrice is for one monaural amplifier. A stereo system uses two.\u003c\/p\u003e\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:#d8d5ce;border:1px solid #d8d5ce;margin:0 0 22px\"\u003e\n\u003cdiv style=\"background:#f7f6f2;padding:12px 14px\"\u003e\n\u003cdiv style=\"font-size:20px;font-weight:600;line-height:1.2\"\u003e125 W\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px;color:#55524c;line-height:1.35;margin-top:3px\"\u003epure Class A into 8 Ω; 1,000 W into 1 Ω\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f7f6f2;padding:12px 14px\"\u003e\n\u003cdiv style=\"font-size:20px;font-weight:600;line-height:1.2\"\u003e20\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px;color:#55524c;line-height:1.35;margin-top:3px\"\u003eparallel push-pull MOS-FETs\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f7f6f2;padding:12px 14px\"\u003e\n\u003cdiv style=\"font-size:20px;font-weight:600;line-height:1.2\"\u003e130 dB\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px;color:#55524c;line-height:1.35;margin-top:3px\"\u003esignal-to-noise ratio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f7f6f2;padding:12px 14px\"\u003e\n\u003cdiv style=\"font-size:20px;font-weight:600;line-height:1.2\"\u003e101 lb\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px;color:#55524c;line-height:1.35;margin-top:3px\"\u003e46.0 kg, each\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin:0 0 12px\"\u003eCreated to mark fifty years of Accuphase, the A-300 is the company's definition of the ideal Class A power amplifier. Twenty parallel push-pull power MOS-FETs run in pure Class A, arranged as an instrumentation amplifier with balanced inputs, behind a large toroidal transformer and 100,000 µF of filter capacitance. Output doubles with each halving of impedance, to 1,000 watts into 1 ohm on music signals, and a pair bridged delivers 500 watts into 8 ohms. Double MCS+ voltage amplification, current feedback and balanced remote sensing produce a damping factor above 1,000 and a signal-to-noise ratio of 130 dB.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 20px\"\u003eStereophile's Jason Victor Serinus reviewed the A-300 in December 2023, and the magazine named it its 2024 Amplification Component of the Year. Each chassis weighs 101 pounds, idles at 230 watts and carries a bar-graph and digital power meter with adjustable hold. A pair of A-300s with the C-3900S preamplifier and DP-770 player is the Accuphase reference system, and it is what we would build for a listener who wants pure Class A without compromise on speaker choice.\u003c\/p\u003e\n\u003ch3 style=\"margin:0 0 8px;font-size:16px\"\u003eKey technologies\u003c\/h3\u003e\n\u003cul style=\"margin:0 0 20px;padding-left:18px\"\u003e\n\u003cli style=\"margin:0 0 5px\"\u003e\n\u003cstrong\u003ePure Class A, twenty-parallel MOS-FET output stage.\u003c\/strong\u003e Twenty pairs of power MOS-FETs in Class A: 125 W into 8 Ω, 250 W into 4 Ω, 500 W into 2 Ω, 1,000 W into 1 Ω (music signals).\u003c\/li\u003e\n\u003cli style=\"margin:0 0 5px\"\u003e\n\u003cstrong\u003eDouble MCS+ and current feedback.\u003c\/strong\u003e Two-parallel voltage amplification stages and current-feedback topology for a 130 dB signal-to-noise ratio and stable high-frequency phase.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 5px\"\u003e\n\u003cstrong\u003eBalanced remote sensing.\u003c\/strong\u003e Feeds the ground reference at the speaker terminals back to the amplifier, raising the effective damping factor at the speaker rather than at the chassis.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 5px\"\u003e\n\u003cstrong\u003eBridged and bi-amp modes.\u003c\/strong\u003e Two A-300s can be bridged for 500 W into 8 Ω, 1,000 W into 4 Ω or 2,000 W into 2 Ω; four-position gain selector.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:0 0 8px;font-size:16px\"\u003eFinishes\u003c\/h3\u003e\n\u003cul style=\"list-style:none;margin:0 0 6px;padding:0\"\u003e\n\u003cli style=\"display:flex;align-items:center;gap:10px;margin:0 0 6px\"\u003e\n\u003cspan style=\"flex:0 0 18px;width:18px;height:18px;border-radius:50%;background:#d9c69b;border:1px solid #d8d5ce\"\u003e\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eChampagne gold\u003c\/strong\u003e \u003cspan style=\"color:#55524c\"\u003eanodized aluminum front panel\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin:0 0 20px;font-size:13.5px;color:#55524c\"\u003eAccuphase builds every component in a single finish, so there is nothing to choose. The champagne-gold front panel has been the house signature since 1972.\u003c\/p\u003e\n\u003cdetails open style=\"border-top:1px solid #080808;margin:0 0 6px\"\u003e\u003csummary style=\"cursor:pointer;padding:12px 0;font-size:16px;font-weight:600\"\u003eSpecifications\u003c\/summary\u003e\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;margin:0 0 14px\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003eMonaural power amplifier, pure Class A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eRated output (20 Hz–20 kHz)\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e125 W into 8 Ω; 250 W into 4 Ω; 500 W into 2 Ω; 1,000 W into 1 Ω (4 Ω and below on music signals)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eBridged output (two units)\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e500 W into 8 Ω; 1,000 W into 4 Ω; 2,000 W into 2 Ω (music signals)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eOutput stage\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003eTwenty parallel push-pull power MOS-FETs, Class A, instrumentation-amplifier configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eTotal harmonic distortion\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e0.03% (4–16 Ω); 0.05% (2 Ω)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eFrequency response\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e20 Hz–20 kHz, +0\/−0.2 dB (rated output); 0.5 Hz–160 kHz, +0\/−3 dB (1 W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eDamping factor\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e1,000 or greater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eGain\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e28 \/ 25 \/ 22 \/ 16 dB, selectable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eInput sensitivity \/ impedance\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e1.26 V for rated output; 40 kΩ balanced (XLR), 20 kΩ line (RCA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eSignal-to-noise ratio\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e130 dB (max gain); 135 dB (−12 dB gain); A-weighted, input shorted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003ePower supply\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003eToroidal transformer; 100,000 µF filter capacitors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003ePower consumption\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e230 W idle; 270 W (IEC 62368-1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eDimensions (W × H × D)\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e18.3 × 9.4 × 20.3 in (465 × 240 × 515 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e101 lb (46.0 kg) each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eSold as\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003eEach (monaural); two required for stereo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp style=\"margin:0 0 14px;font-size:13px\"\u003e\u003ca href=\"https:\/\/www.accuphase.com\/model\/a-300.html\" target=\"_blank\" rel=\"noopener\"\u003eAccuphase A-300 product page and specifications\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-top:1px solid #080808;border-bottom:1px solid #080808;margin:0 0 22px\"\u003e\u003csummary style=\"cursor:pointer;padding:12px 0;font-size:16px;font-weight:600\"\u003eWhere it sits in the range\u003c\/summary\u003e\u003cdiv style=\"padding:0 0 14px\"\u003e\n\u003cp style=\"margin:0 0 8px\"\u003eThe reference power amplifier, sold per unit. The A-80 is the stereo Class A alternative; the P-7500 gives Class AB power in one chassis.\u003c\/p\u003e\n\u003cul style=\"margin:0;padding-left:18px\"\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/accuphase-p-4600\"\u003eAccuphase P-4600\u003c\/a\u003e: 150 W\/ch Class AB stereo power amplifier\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/accuphase-p-7500\"\u003eAccuphase P-7500\u003c\/a\u003e: 300 W\/ch Class AB flagship stereo power amplifier\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/accuphase-a-80\"\u003eAccuphase A-80\u003c\/a\u003e: 65 W\/ch pure Class A stereo power amplifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuphase A-300\u003c\/strong\u003e (this model)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin:10px 0 0\"\u003ePair two A-300s with the \u003ca href=\"\/products\/accuphase-c-3900s\"\u003eC-3900S\u003c\/a\u003e preamplifier and the \u003ca href=\"\/products\/accuphase-dp-770\"\u003eDP-770\u003c\/a\u003e player for the full Accuphase reference system.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003ch3 style=\"margin:0 0 8px;font-size:16px\"\u003eReviews\u003c\/h3\u003e\n\u003cul style=\"margin:0 0 22px;padding-left:18px\"\u003e\n\u003cli style=\"margin:0 0 5px\"\u003e\n\u003ca href=\"https:\/\/www.stereophile.com\/content\/accuphase-300-monoblock-power-amplifier\" target=\"_blank\" rel=\"noopener\"\u003eStereophile: Accuphase A-300 monoblock power amplifier\u003c\/a\u003e (Jason Victor Serinus, December 2023)\u003c\/li\u003e\n\u003cli style=\"margin:0 0 5px\"\u003e\n\u003ca href=\"https:\/\/www.stereophile.com\/content\/stereophiles-products-2024-amplification-component-year\" target=\"_blank\" rel=\"noopener\"\u003eStereophile: 2024 Amplification Component of the Year\u003c\/a\u003e (Accuphase A-300)\u003c\/li\u003e\n\u003cli style=\"margin:0 0 5px\"\u003e\n\u003ca href=\"https:\/\/www.accuphase.com\/review_pdf\/A-300_LP_12-2023_eng.pdf\" target=\"_blank\" rel=\"noopener\"\u003eLP Magazin (Germany): Accuphase A-300\u003c\/a\u003e (English translation, December 2023)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"padding:16px 18px;background:#f7f6f2;border-left:3px solid #8d1935\"\u003e\n\u003cp style=\"margin:0 0 4px;font-weight:600\"\u003ePlan your Accuphase system with Pearl Audio\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:14px\"\u003ePearl Audio is an authorized Accuphase dealer in Portland, Oregon. We can help with system matching, delivery and setup, and arrange a listening appointment. Call \u003ca href=\"tel:+15032222599\"\u003e(503) 222-2599\u003c\/a\u003e or email \u003ca href=\"mailto:sales@pearlaudio.com?subject=Accuphase%20A-300\"\u003esales@pearlaudio.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Accuphase","offers":[{"title":"Default Title","offer_id":50784178896994,"sku":null,"price":24975.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2475\/2780\/files\/a-300.jpg?v=1793169057","url":"https:\/\/pearlaudio.com\/products\/accuphase-a-300","provider":"Pearl Audio","version":"1.0","type":"link"}