{"product_id":"ibasso-amp19-nutube-super-class-a-amplifier-card-for-dx340","title":"iBasso AMP19 Nutube + Super Class A Amplifier Card for DX340","description":"\u003cp\u003eThe iBasso AMP19 is an interchangeable amplifier card for the \u003ca href=\"\/products\/ibasso-dx340-flagship-digital-audio-player\"\u003eiBasso DX340\u003c\/a\u003e with two very different amplifiers in one compact module: a KORG Nutube 6P1 tube mode for a rich, relaxed sound, and iBasso’s fully discrete Super Class A mode for power and density. With the DX340 on 12V DC it delivers up to 2,150mW per channel into 32Ω, enough for demanding full-size headphones.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/1_281_29.png\" alt=\"iBasso AMP19 Nutube and Super Class A amp card for the DX340\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eNutube 6P1\u003c\/h3\u003e\n\u003cp\u003eThe sixth-generation Nutube 6P1 triode, developed jointly by KORG and Noritake, brings the character of traditional tubes to a portable player: warm and natural, with engaging vocals, softer textures and an analogue feel. It is far smaller and more efficient than a conventional tube, about 30% of the size and 2% of the power, and lasts more than 30,000 hours.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/2.png\" alt=\"KORG Nutube 6P1 in the iBasso AMP19\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTwo output modes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube mode:\u003c\/strong\u003e the Nutube 6P1 works as the pre-amp tube, adding harmonic richness for a warmer, more relaxed and natural presentation, with softer textures to vocals and instruments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuper Class A mode:\u003c\/strong\u003e 20 dual transistors form a fully discrete amplifier capable of up to 2A, for powerful energy and dynamics, fast transients, a fuller presentation and excellent vocal density and texture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/3_282_29.png\" alt=\"Tube and Super Class A modes of the iBasso AMP19\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003eiBasso’s block diagram shows the Nutube on its own 22.5V anode supply and filament supply, followed by a JRC volume IC, a phase inverter and a headphone amplifier of op-amps and five transistor pairs per leg; in Super Class A mode the signal goes straight to the headphone amplifier.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/4.png\" alt=\"iBasso AMP19 block diagram\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003e2,150mW with 12V DC-IN\u003c\/h3\u003e\n\u003cp\u003eWith iBasso’s 12V DC-IN external power, the headphone amplifier’s supply rises from ±6.5V to ±12V, and the AMP19 delivers up to 2,150mW + 2,150mW into 32Ω, giving the portable DX340 far more drive for demanding headphones.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/5.png\" alt=\"2150mW per channel into 32 ohms\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eCareful engineering\u003c\/h3\u003e\n\u003cp\u003eIn Tube mode, a JRC hardware volume control adjusts the level in 100 fine analogue steps rather than by digital attenuation, so the DAC signal stays intact, noise stays low at low volume and detail and layering are kept, whether you use sensitive IEMs or high-impedance headphones. To keep tube microphonics down, PORON material suspends the Nutube in the chassis to absorb shock and vibration. Before shipping, every card is tested on an Audio Precision APx555 analyser, and iBasso engineers calibrate and match the Nutube circuit by hand with four multi-turn potentiometers, so each card sounds the same.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/6_281_29.png\" alt=\"JRC hardware volume control of the iBasso AMP19\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/7_281_29.png\" alt=\"PORON suspension of the Nutube in the iBasso AMP19\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/8_281_29.png\" alt=\"Testing on an Audio Precision APx555\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSuper Class A, 4.4mm\u003c\/th\u003e\n\u003ctd\u003e8.3 \/ 5.8 \/ 3.8 \/ 1.8Vrms (super \/ high \/ mid \/ low gain) · 2,150mW + 2,150mW @ 32Ω (12V DC), 1,000mW + 1,000mW (battery) · THD+N −109dB · SNR and dynamic range 121dB · crosstalk −114dB · output impedance 1.4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSuper Class A, 3.5mm\u003c\/th\u003e\n\u003ctd\u003e4.15 \/ 2.92 \/ 1.89 \/ 0.89Vrms · 500mW + 500mW @ 32Ω (12V DC), 260mW + 260mW (battery) · THD+N −105dB · SNR 110dB · output impedance 0.7Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTube, 4.4mm\u003c\/th\u003e\n\u003ctd\u003e7.7 \/ 4.53 \/ 2.92 \/ 1.55Vrms · 1,850mW + 1,850mW @ 32Ω (12V DC), 590mW + 590mW (battery) · 1.4Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTube, 3.5mm\u003c\/th\u003e\n\u003ctd\u003e3.7 \/ 2.3 \/ 1.49 \/ 0.79Vrms · 428mW + 428mW @ 32Ω (12V DC), 165mW + 165mW (battery) · 0.7Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFrequency response\u003c\/th\u003e\n\u003ctd\u003e10Hz–40kHz (±1dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003ctd\u003eiBasso DX340 (firmware V1.08 or later)\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 DX340 needs firmware 1.08 or later to use the AMP19. The DX340 and 12V DC-IN supply are sold separately.\u003c\/li\u003e\n\u003cli\u003eIn the box: AMP19 card, screwdriver and four screws.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"iBasso","offers":[{"title":"Default Title","offer_id":62725112725891,"sku":"IBASSOAMP19","price":259.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/IBASSOAMP19_4249d187-1148-4f20-978a-4375cc3395fa.jpg?v=1790785617","url":"https:\/\/www.advancedmp3players.co.uk\/products\/ibasso-amp19-nutube-super-class-a-amplifier-card-for-dx340","provider":"amp3","version":"1.0","type":"link"}