{"product_id":"yamaha-a-s501-integrated-amplifier","title":"Yamaha A-S501 Integrated Amplifier","description":"\u003cp\u003eYamaha has been building instruments, tuning concert halls, and engineering audio equipment since 1887 — and that institutional knowledge of how music actually sounds is baked into every circuit decision in the A-S501. This is a 85-watt-per-channel integrated amplifier designed around Yamaha's ToP-ART (Total Purity Audio Reproduction Technology) philosophy: a strictly symmetrical left\/right layout, an ART Base chassis with a solid center bar that damps resonance before it can color the sound, and direct signal paths wherever the engineering allows. At $599, it competes in a segment crowded with receivers masquerading as integrated amplifiers — the A-S501 is the genuine article.\u003c\/p\u003e\n\n\u003cp\u003eThe built-in DAC accepts optical and coaxial digital inputs, so a TV, Blu-ray player, or streamer connects directly without an outboard converter. A phono MM stage handles a turntable. Pure Direct mode strips the signal down to the shortest possible circuit route — tone controls, loudness, and buffer amp all bypassed — for sessions when you want nothing between the source and the speakers. The damping factor of 240 gives the amplifier a firm grip on woofer cones, which translates directly to tighter, more controlled bass regardless of what speakers you pair it with.\u003c\/p\u003e\n\n\u003cp\u003eThe front panel is brushed aluminum, the volume control is smooth, and the input selector is a weighted rotary encoder with LED indicators rather than the flimsy selector switches common at this price. Yamaha also engineered in Bluetooth adapter compatibility (YBA-11, optional) for casual listening without disrupting the direct-signal architecture. The A-S501 is the kind of amplifier that rewards you whether you're running vintage speakers, a new stand-mount, or a full floor-standing system — and it won't embarrass itself next to components that cost twice as much.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eToP-ART Symmetrical Architecture.\u003c\/strong\u003e Left and right channels run in strict mirror symmetry from input to output binding post — the shortest possible path, with no channel crosstalk from shared circuitry. This is Yamaha's foundational design discipline, carried from their flagship C-5000 \/ M-5000 separates down into the A-S501.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePure Direct Mode.\u003c\/strong\u003e Activates a bypass that removes the tone controls, loudness circuit, and buffer amplifier from the signal path entirely. What you hear is the source, the volume control, the power stage, and your speakers — nothing else.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBuilt-In DAC with Optical and Coaxial Inputs.\u003c\/strong\u003e A digital-to-analog converter is integrated into the chassis, accepting one optical (TV) and one coaxial (Blu-ray \/ streamer) source. No outboard DAC required for a modern digital-source system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePhono MM Stage.\u003c\/strong\u003e A proper moving-magnet phono stage is on board, correctly loaded and quietly implemented — a direct connection for any turntable with an MM or high-output MC cartridge.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDamping Factor of 240.\u003c\/strong\u003e A high damping factor means the amplifier actively controls the back-EMF from the woofer, reducing overhang and smear in the bass. At 240, the A-S501's grip on your woofers is well above average for its class.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eART Base Chassis.\u003c\/strong\u003e The reinforced base with a solid center bar isolates the internal components from external vibration and suppresses resonance within the chassis — an engineering detail that shows up as a quieter noise floor in use.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChannels:\u003c\/strong\u003e 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum RMS Output Power (8 ohms, 20 Hz–20 kHz, 0.019% THD):\u003c\/strong\u003e 85 W + 85 W\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Dynamic Power per Channel (8 \/ 6 \/ 4 \/ 2 ohms):\u003c\/strong\u003e 130 \/ 150 \/ 185 \/ 220 W\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion (CD to Speaker Out, 20 Hz–20 kHz, 50 W \/ 8 ohms):\u003c\/strong\u003e 0.019%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio (CD, input shorted, 200 mV):\u003c\/strong\u003e 99 dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDamping Factor (8 ohms):\u003c\/strong\u003e 240\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 10 Hz – 100 kHz, +\/– 1.0 dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDigital Inputs:\u003c\/strong\u003e 1 × Optical (TOSLINK), 1 × Coaxial (RCA)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnalog Audio Inputs:\u003c\/strong\u003e 8 total (includes Phono MM, CD, Tuner, Line 1, Line 2)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnalog Audio Outputs:\u003c\/strong\u003e 2 (includes Subwoofer Pre-Out)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePhono Stage:\u003c\/strong\u003e MM (moving magnet)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpeaker Terminals:\u003c\/strong\u003e A, B, or A+B (dual speaker system)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePure Direct Mode:\u003c\/strong\u003e Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLoudness Control:\u003c\/strong\u003e Continuously variable\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBluetooth:\u003c\/strong\u003e Compatible with optional YBA-11 Bluetooth adapter (aptX)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAuto Power Standby:\u003c\/strong\u003e Yes (after approximately 8 hours of inactivity)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandby Power Consumption:\u003c\/strong\u003e 0.5 W\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (W × H × D):\u003c\/strong\u003e 17-1\/8\" × 6\" × 15-1\/4\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 22.7 lbs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish Options:\u003c\/strong\u003e Silver, Black\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yamaha","offers":[{"title":"Silver","offer_id":48819116015835,"sku":null,"price":599.95,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":48819116048603,"sku":null,"price":599.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1363\/6553\/files\/yamaha-a-s501-silver.jpg?v=1780017447","url":"https:\/\/almaaudio.com\/products\/yamaha-a-s501-integrated-amplifier","provider":"Alma Music and Audio","version":"1.0","type":"link"}