{"product_id":"fiio-m33-r2r","title":"Fiio M33 R2R","description":"\u003cp\u003eThe Fiio M33 R2R is FiiO's first portable player built around a true R2R ladder DAC, bringing a conversion approach usually reserved for boutique desktop gear to a pocketable Android device. Instead of an off the shelf chip, FiiO assembled a fully differential 24 bit ladder from 192 precision thin film resistors, then wrapped it in a modern Snapdragon 680 platform with a 5.5 inch 1080p display.\u003c\/p\u003e\u003cp\u003eLaunched in 2026 as the follow up to the M23, the M33 R2R is aimed at listeners who find typical delta sigma players technically impressive but tonally flat, and who want a more organic presentation without giving up streaming apps or balanced power.\u003c\/p\u003e\u003ch3\u003eType and Technology\u003c\/h3\u003e\u003cp\u003eThe heart of the M33 R2R is a four channel, fully differential 24 bit R2R resistor array using 0.1 percent tolerance thin film resistors selected for low temperature drift. A high capacity FPGA runs FiiO's DAPS signal purification with dual femtosecond crystal oscillators, borrowed from the flagship M27, and an XMOS XU316 handles USB duties up to 768kHz\/32 bit and native DSD512. You can run the ladder in oversampling (OS) mode for tighter conventional precision or non oversampling (NOS) mode for the classic relaxed R2R presentation. The analog stage pairs two OPA1637 fully differential op amps with four parallel INA1620 buffers and NJW1195A volume control.\u003c\/p\u003e\u003ch3\u003eSound Character\u003c\/h3\u003e\u003cp\u003eThe M33 R2R leans warm, organic, and analog sounding, with denser mids and more natural vocal timbre than typical delta sigma rivals, yet it retains more micro detail than most R2R designs near this price. NOS mode emphasizes the easygoing analog character, OS mode firms up timing and edge definition, and the selectable Natural and Warmer profiles let you fine tune how much richness you want.\u003c\/p\u003e\u003ch3\u003eBuild and Features\u003c\/h3\u003e\u003cp\u003eThe aluminum chassis weighs about 258g and comes in Retro Gold, Dark Blue, or Black, with a leather case pre installed. A 4400mAh battery delivers roughly 15.5 hours single ended or 13.5 hours balanced, and dual USB C ports enable FiiO's battery bypass desktop mode. With a fast charger attached, Super High Gain unlocks up to 1100mW per channel balanced at 32 ohms. The 3.5mm and 4.4mm jacks double as line outputs, a 3.5mm coaxial output feeds external DACs, and Bluetooth 5.0 transmits LDAC and LHDC. A 10 band parametric EQ with AUTO EQ, retro cassette and VU meter interface themes, five operating modes, and microSD expansion up to 2TB round out the package.\u003c\/p\u003e\u003ch3\u003eBest For\u003c\/h3\u003e\u003cp\u003eListeners who want R2R density and ease in a portable rig, especially with resolving \u003ca href=\"\/collections\/iems\"\u003eIEMs\u003c\/a\u003e that can sound lean on conventional sources. If you are comparing options, browse our other \u003ca href=\"\/collections\/dap\"\u003edigital audio players\u003c\/a\u003e or the full \u003ca href=\"\/collections\/fiio\"\u003eFiio collection\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFiio M33 R2R player\u003c\/li\u003e\n\u003cli\u003eLeather case (pre installed)\u003c\/li\u003e\n\u003cli\u003eScreen protector (pre applied)\u003c\/li\u003e\n\u003cli\u003eUSB Type C data cable\u003c\/li\u003e\n\u003cli\u003eQuick start guide and warranty card\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDAC\u003c\/td\u003e\n\u003ctd\u003eFiiO fully differential 24 bit R2R ladder, 192 thin film resistors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmp stage\u003c\/td\u003e\n\u003ctd\u003e2x OPA1637 with 4x INA1620 buffers, NJW1195A volume control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlatform\u003c\/td\u003e\n\u003ctd\u003eSnapdragon 680, Android 13, XMOS XU316 USB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003e5.5 inch, 1080 x 2160\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeadphone outputs\u003c\/td\u003e\n\u003ctd\u003e3.5mm single ended, 4.4mm balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput power\u003c\/td\u003e\n\u003ctd\u003eBalanced up to 1100mW x2 at 32 ohms (Super High Gain with fast charger); single ended up to 470mW x2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLine and digital outputs\u003c\/td\u003e\n\u003ctd\u003e3.5mm line out (2Vrms), 4.4mm line out (4Vrms), 3.5mm coaxial, USB Audio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDecoding\u003c\/td\u003e\n\u003ctd\u003eLocal 384kHz\/32 bit and DSD256; USB DAC 768kHz\/32 bit and DSD512\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain levels\u003c\/td\u003e\n\u003ctd\u003eLow, Medium, High, Super High\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e4400mAh, about 15.5 hours single ended, 13.5 hours balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003e8GB RAM, 128GB internal, microSD up to 2TB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless\u003c\/td\u003e\n\u003ctd\u003eBluetooth 5.0 (LDAC, LHDC, aptX HD TX), dual band WiFi, AirPlay, DLNA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e138.2 x 71.5 x 17mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eAbout 258g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColors\u003c\/td\u003e\n\u003ctd\u003eRetro Gold, Dark Blue, Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat Reviewers Say\u003c\/h3\u003e\n\u003cp\u003eReviews By WaveTheory highlights the M33 R2R's smooth analog character from its ladder DAC in his quick hands-on review.\u003c\/p\u003e\n\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;\"\u003e\u003ciframe loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/9fZaNXH2yw4\" title=\"Reviews By WaveTheory reviews FiiO M33 R2R\" frameborder=\"0\" allow=\"accelerometer; encrypted-media; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e","brand":"Fiio","offers":[{"title":"Gold","offer_id":53612176933143,"sku":null,"price":729.99,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":53615985557783,"sku":null,"price":729.99,"currency_code":"USD","in_stock":true},{"title":"Blue","offer_id":53615985590551,"sku":null,"price":729.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0213\/4262\/files\/fio-9-m33-thumb.webp?v=1783024813","url":"https:\/\/www.mimic-audio.com\/products\/fiio-m33-r2r","provider":"Mimic-Audio","version":"1.0","type":"link"}