{"product_id":"ibasso-amp13-amplifier-card","title":"iBasso AMP13 Amplifier Card","description":"\u003cp\u003eThe iBasso AMP13 is a plug-in amplifier card that brings real tube sound to iBasso’s DX300, DX320 and DX340 players. Built around a sixth-generation Korg Nutube 6P1, a modern miniature triode, it has two 3.5mm outputs, one for the purest tube character and lowest noise, the other for maximum drive, and a three-channel design with an actively driven ground.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp13-amplifier-card-photo-hero.jpg?v=1791361461\" alt=\"iBasso AMP13 three-channel Nutube amp card\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eA sixth-generation Korg Nutube\u003c\/h3\u003e\n\u003cp\u003eMade by Korg and Noritake, the Nutube 6P1 works exactly like a conventional triode vacuum tube and creates the same rich overtones that are sought after in triodes, while using far less power and space. In the AMP13 the Nutube does the voltage amplification, for an engaging, unique tube sound with excellent linearity.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp13-amplifier-card-photo-nutube.jpg?v=1791361466\" alt=\"The Korg Nutube 6P1 in the iBasso AMP13\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTwo 3.5mm outputs, two characters\u003c\/h3\u003e\n\u003cp\u003eThe Nutube’s voltage gain is limited, so higher output needs a second amplification stage. To offer both a stronger tube signature and higher power, the AMP13 has two 3.5mm single-ended outputs. The Low Noise Tube output (2.5Vrms) is taken after the first stage, the Nutube followed by volume control and current amplification, for the strongest tube character and excellent noise control. The Maximised output (4.1Vrms) adds a second voltage and current stage for better drive with headphones and IEMs.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp13-amplifier-card-photo-outputs.jpg?v=1791361472\" alt=\"Low Noise Tube and Maximised outputs of the iBasso AMP13\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp13-amplifier-card-photo-diagram.jpg?v=1791361477\" alt=\"iBasso AMP13 circuit block diagram\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eThree-channel amplification\u003c\/h3\u003e\n\u003cp\u003eOrdinary single-ended outputs amplify only the left and right channels. The Nutube’s low output and noise control have always been a design challenge, so the AMP13 uses three-channel amplification, with an OPA1622 amplifying the output ground signal: the noise floor drops substantially, dynamics improve and the Nutube performs better.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp13-amplifier-card-photo-three_channel.jpg?v=1791361481\" alt=\"Three-channel amplification on the iBasso AMP13\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eAdvanced circuit design\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eA Toshiba 2SK209 field-effect transistor, inherited from the AMP9, buffers the Nutube’s signal.\u003c\/li\u003e\n\u003cli\u003eSignal ground and shield ground are separated to prevent noise interference.\u003c\/li\u003e\n\u003cli\u003eCarefully set negative feedback reduces distortion and extends the bandwidth.\u003c\/li\u003e\n\u003cli\u003eA dedicated JRC NJU72315 ultra-low-noise volume control lowers the noise floor at low volumes and in quiet passages, and improves transparency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp13-amplifier-card-photo-circuit.jpg?v=1791361486\" alt=\"Advanced circuit design of the iBasso AMP13\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eIts own power supply\u003c\/h3\u003e\n\u003cp\u003eThe amp section of the DX300 and DX320 has its own battery, ideal for the AMP13: two high-performance Linear Technology DC-DC chips provide four supplies, 1.8V for the Nutube’s cathode through a low-noise LDO, 21V for its anode, and +8V and −8V to give the op-amps a 16V swing.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp13-amplifier-card-photo-battery.jpg?v=1791361492\" alt=\"Dedicated battery and DC-DC supplies for the iBasso AMP13\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eHand matched\u003c\/h3\u003e\n\u003cp\u003eEvery AMP13 is tested and matched on an Audio Precision analyser, and engineers hand-calibrate three multi-turn potentiometers on the board for the Nutube’s best performance, for a clean, extended treble and a sweet, engaging sound.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp13-amplifier-card-photo-matched.jpg?v=1791361496\" alt=\"The hand-matched iBasso AMP13 board\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/IBASSOAMP13_790x448_859e8eb1-bced-423e-9b13-f8fd506eba7e.jpg?v=1767172107\" alt=\"iBasso AMP13 amplifier card\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTube\u003c\/th\u003e\n\u003ctd\u003eKorg Nutube 6P1 (6th generation) with Toshiba 2SK209 buffer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutputs\u003c\/th\u003e\n\u003ctd\u003e3.5mm Low Noise Tube (2.5Vrms) · 3.5mm Maximised (4.1Vrms) · Pentaconn sockets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCircuit\u003c\/th\u003e\n\u003ctd\u003eThree-channel (OPA1622 active ground) · JRC NJU72315 volume · 4 DC-DC supplies (1.8V, 21V, ±8V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003ctd\u003eiBasso DX300, DX320 and DX340\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp13-amplifier-card-photo-firmware.jpg?v=1791361500\" alt=\"Update your iBasso player’s firmware before fitting the AMP13\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eGood to know\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUpdate the player’s firmware to the latest version before fitting the AMP13, for optimised support.\u003c\/li\u003e\n\u003cli\u003eBoth outputs are 3.5mm single-ended; there is no balanced output on this card.\u003c\/li\u003e\n\u003cli\u003eIn the box: AMP13, Torx screwdriver and storage case. See also the \u003ca href=\"\/products\/ibasso-dx340-flagship-digital-audio-player\"\u003eiBasso DX340\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"iBasso","offers":[{"title":"BLACK","offer_id":57115947696515,"sku":"IBASSOAMP13-BLACK","price":239.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/img_proxy_99d93385-c051-48aa-8d17-9427d45abe5d.jpg?v=1767172135","url":"https:\/\/www.advancedmp3players.co.uk\/products\/ibasso-amp13-amplifier-card","provider":"amp3","version":"1.0","type":"link"}