{"product_id":"ibasso-amp18-amplifier-card-for-dx340","title":"iBasso AMP18 Amplifier Card for DX340","description":"\u003cp\u003eThe iBasso AMP18 is a swappable amplifier card for the iBasso \u003ca href=\"\/products\/ibasso-dx340-flagship-digital-audio-player\"\u003eDX340\u003c\/a\u003e, DX320 and DX300 players. An 80-transistor matrix, a cascaded current-feedback circuit and a two-stage design give up to 1,740mW per channel into 32Ω when a DX340 runs from 12V DC, through dual 4.4mm balanced outputs: one for headphones and a dedicated line out.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp18-amplifier-card-for-dx340-photo-hero.jpg?v=1791389305\" alt=\"iBasso AMP18 amplifier card\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003e80 transistors on a card\u003c\/h3\u003e\n\u003cp\u003eThe AMP18 breaks through the size limits of an amp card: 40 dual transistors form an 80-transistor matrix, which iBasso calls a feat of real difficulty. Good circuit design and so many high-quality transistors give it higher current output, better compatibility with low-impedance headphones and outstanding sound.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp18-amplifier-card-for-dx340-photo-matrix.jpg?v=1791389311\" alt=\"The 80-transistor matrix of the iBasso AMP18\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eCascaded current feedback\u003c\/h3\u003e\n\u003cp\u003eTraditional headphone amplifiers often use deep, large-loop negative feedback. That lowers static distortion but delays the signal, so sudden dynamics such as drums or intense passages lose speed, punch and detail. The AMP18 uses a cascaded current-feedback circuit instead, avoiding that transient distortion while keeping its dynamic range and fast transient response.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp18-amplifier-card-for-dx340-photo-feedback.jpg?v=1791389317\" alt=\"Cascaded current feedback circuit of the iBasso AMP18\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTwo-stage amplification\u003c\/h3\u003e\n\u003cp\u003eThe first stage combines low-noise op-amps with transistors: the op-amps restore the detail in the source, while the transistors boost drive so the signal isn’t weakened early on. The second stage uses current-mirror amplification with complementary outputs for linear current output. Beats start and stop crisply with natural decay, and details such as violin harmonics or a singer’s breath come through clearly.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp18-amplifier-card-for-dx340-photo-twostage.jpg?v=1791389322\" alt=\"Two-stage amplification of the iBasso AMP18\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe complementary output stage amplifies the positive and negative halves of the waveform symmetrically, greatly reducing the asymmetric distortion of conventional transistor output stages. Without clipping, deep bass and treble extension stay clean, the dry “digital” sound is reduced and the result is warmer and more natural.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp18-amplifier-card-for-dx340-photo-complementary.jpg?v=1791389328\" alt=\"Complementary output circuit of the iBasso AMP18\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp18-amplifier-card-for-dx340-photo-diagram.jpg?v=1791389333\" alt=\"iBasso AMP18 architecture diagram\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003e1,740mW per channel on 12V DC\u003c\/h3\u003e\n\u003cp\u003eWith the DX340’s external 12V DC supply the AMP18 swings ±12V and, in super-gain mode, delivers 1,740mW + 1,740mW into 32Ω, enough for almost any headphones or IEMs, with deep, impactful bass, a full midrange and clean, extended treble. On battery it gives 1,170mW + 1,170mW.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp18-amplifier-card-for-dx340-photo-power.jpg?v=1791389337\" alt=\"1740mW output on 12V DC with the iBasso AMP18\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eDual 4.4mm balanced outputs\u003c\/h3\u003e\n\u003cp\u003eOne 4.4mm socket is the headphone output, for better drive and sound with flagship headphones and IEMs; the other is a dedicated balanced line output, a clean source for an external headphone amplifier, so a DX340 with the AMP18 can be the heart of a full hi-fi system. The card also fits the DX300 and DX320, transforming their sound too.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp18-amplifier-card-for-dx340-photo-outputs.jpg?v=1791389341\" alt=\"4.4mm balanced line and phone outputs of the iBasso AMP18\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp18-amplifier-card-for-dx340-photo-compat.jpg?v=1791389347\" alt=\"iBasso AMP18 with the DX300, DX320 and DX340\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e4.4mm phone out\u003c\/th\u003e\n\u003ctd\u003e1,740mW + 1,740mW @ 32Ω (12V DC) · 1,170mW + 1,170mW (battery) · THD+N −114dB (no load), −105dB (300Ω), −93dB (32Ω) · dynamic range 123dB · SNR 122dB · crosstalk 122dB · 10Hz–40kHz ±0.9dB · output impedance 1.2Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e4.4mm line out\u003c\/th\u003e\n\u003ctd\u003eTHD+N −110dB (no load) · dynamic range 123dB · SNR 123dB · crosstalk 114dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDesign\u003c\/th\u003e\n\u003ctd\u003e40 dual transistors (80-transistor matrix) · cascaded current feedback · two-stage, complementary output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlayers\u003c\/th\u003e\n\u003ctd\u003eiBasso DX340 (12V DC on DX340 only), DX320, DX300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eGood to know\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe 12V DC power mode needs a DX340 (power supply sold separately). The DX300 and DX320 run the AMP18 on battery only.\u003c\/li\u003e\n\u003cli\u003eUpdate your DX340 to firmware 1.07 or later before fitting the AMP18.\u003c\/li\u003e\n\u003cli\u003eIn the box: AMP18 card, screwdriver, spare screws and warranty card.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp18-amplifier-card-for-dx340-photo-box.jpg?v=1791389352\" alt=\"iBasso AMP18 package contents\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/ibasso-amp18-amplifier-card-for-dx340-photo-photo.jpg?v=1791389356\" alt=\"iBasso AMP18 amplifier card\" loading=\"lazy\"\u003e\u003c\/p\u003e","brand":"iBasso","offers":[{"title":"Default Title","offer_id":57551124103555,"sku":"IBASSOAMP18","price":249.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/img_proxy_f7bea45f-6373-4950-a8c0-41493e77cd70.jpg?v=1773119108","url":"https:\/\/www.advancedmp3players.co.uk\/products\/ibasso-amp18-amplifier-card-for-dx340","provider":"amp3","version":"1.0","type":"link"}