{"product_id":"accuphase-e-280-integrated-stereo-amplifier-used","title":"Accuphase E-280 Integrated Stereo Amplifier (Open Box)","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThis is the exact unit shown in the photos — a previous demo item being offered as open box. Please note that no factory warranty applies. Includes original packaging, remote, and accessories. The E-280 is Accuphase's entry point into their renowned integrated amplifier lineup, hand-built in Yokohama, Japan, and delivering the brand's hallmark craftsmanship and circuit refinement at a more accessible level. The power amplifier section uses bipolar transistors in a double parallel push-pull configuration, configured as an instrumentation amplifier, producing 90 watts per channel into 8 ohms and 120 watts per channel into 4 ohms. A high damping factor of 500 ensures firm, authoritative control over any speaker load, while the current feedback amplification topology and low-impedance output design work together to bring out the full potential of connected speakers.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAt the heart of the preamplifier section is Accuphase's proprietary AAVA (Analog Vari-gain Amplifier) volume control, which eliminates all variable resistors from the signal path entirely — using 16 V-I converter circuits with varying gain to maintain an optimal signal-to-noise ratio of 107dB across the entire volume range. The E-280's AAVA implementation uses maximum gain in four parallel rows and secondary V-I converter circuits in two parallel rows, doubling output current capability and halving circuit impedance for lower noise than its predecessors. Logic-controlled relays ensure the shortest possible signal paths, MOS-FET switches handle speaker protection, and two expansion slots accept optional add-on boards such as a DAC or phono module for expanded functionality.\u003c\/p\u003e","brand":"Accuphase","offers":[{"title":"Default Title","offer_id":45098485940277,"sku":null,"price":5500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/1704\/1461\/files\/IMG_7878.heic?v=1775075091","url":"https:\/\/alleliteaudio.com\/products\/accuphase-e-280-integrated-stereo-amplifier-used","provider":"All Elite Audio","version":"1.0","type":"link"}