{"product_id":"ibasso-pb5-portable-balanced-tube-amp","title":"iBasso PB5 Portable Balanced Tube Amp","description":"\u003cp\u003eThe iBasso PB5 Osprey is a portable balanced headphone amplifier with a pair of Korg Nutube 6P1 valves. A transistor current stage, six batteries and a 24-step stepped attenuator help it deliver 1,700mW per channel into 32Ω from a 4.4mm balanced line input.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/IBASSOPB5_790x508_45af461c-d908-4bfd-9018-a15f2a5a5ecd.jpg?v=1767196843\" alt=\"iBasso PB5 Osprey portable tube amplifier in green\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eNutube voltage gain\u003c\/h3\u003e\n\u003cp\u003eThe sixth-generation Nutube 6P1 from Korg and Noritake works like a conventional triode, with the same rich overtones, but uses far less power and space. It handles voltage amplification in the PB5. A two-step suspension reduces microphonics, and a cathode input lowers impedance to keep out interference.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/IBASSOPB5_790x572_cae03547-4de7-415c-8ff5-5a2aee18668c.jpg?v=1767196822\" alt=\"Inside the iBasso PB5 with its Nutube valves and batteries\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSix batteries, real power\u003c\/h3\u003e\n\u003cp\u003eTwo batteries power the Nutubes and four power the output stage. A TI OPA827 op-amp, low-saturation BISS transistors rated to 2A and iBasso’s custom film capacitors complete the circuit. Volume is a tiny 24-position, four-section stepped attenuator with channel matching within ±0.1dB, which lowers the noise floor along with the level.\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eInput\u003c\/th\u003e\n\u003ctd\u003e4.4mm balanced, up to 2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutputs\u003c\/th\u003e\n\u003ctd\u003e4.4mm balanced (9Vrms) · 3.5mm single-ended (4.5Vrms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e1,700mW + 1,700mW @ 32Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGain\u003c\/th\u003e\n\u003ctd\u003e+2dB (low) · +11.5dB (high)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeadphones\u003c\/th\u003e\n\u003ctd\u003e8–600Ω recommended · output impedance 0.25Ω balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBattery\u003c\/th\u003e\n\u003ctd\u003eAbout 10.5 hours · 2.5 hours to charge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize and weight\u003c\/th\u003e\n\u003ctd\u003e139 × 82 × 28mm · 352g\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\/IBASSOPB5_790x478_13d9611b-0a5b-48b5-8782-bcd9b4b6835c.jpg?v=1767196836\" alt=\"iBasso PB5 connected to a music player with a short 4.4mm interconnect\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003eGood to know\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe input is 4.4mm balanced only, so your player needs a 4.4mm line output.\u003c\/li\u003e\n\u003cli\u003eKeep the input below 2.5V or it will distort. With iBasso’s DX220MAX, DX300MAX or DX320MAX, don’t use the highest line-out gain: it gives about 4.4–4.5V.\u003c\/li\u003e\n\u003cli\u003eThis is an amplifier only: it has no DAC.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"iBasso","offers":[{"title":"Default Title","offer_id":57117149102467,"sku":"IBASSOPB5","price":1399.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/3199\/8339\/files\/img_proxy_f7cfa7a2-61c9-4d47-804b-c90f31b7f5c2.jpg?v=1767196863","url":"https:\/\/www.advancedmp3players.co.uk\/products\/ibasso-pb5-portable-balanced-tube-amp","provider":"amp3","version":"1.0","type":"link"}