{"product_id":"advance-paris-wtxtubes-bluetooth-receiver-with-aptx-hd-and-analog-class-a-tube-output-stage","title":"Advance Paris WTXTubes Bluetooth Receiver with aptX HD and Analog Class A Tube Output Stage","description":"\u003c!-- DESCRIPTION TAB --\u003e\n\u003ch2\u003eWhat You Need to Know\u003c\/h2\u003e\n\u003ch3\u003eWhat Is the WTX-Tubes?\u003c\/h3\u003e\n\u003cp\u003eThe Advance Paris WTX-Tubes is a standalone Bluetooth receiver with a twist that most wireless audio products simply don’t have: a real vacuum tube output stage. You pair it with your phone, tablet, or laptop just like any Bluetooth speaker or receiver. But once the signal arrives, it passes through two genuine Raytheon 5703 subminiature tubes in a Class A circuit before reaching your amplifier. The result, according to Advance Paris, is Bluetooth playback with an analog warmth and musicality that digital-only receivers typically can’t match.\u003c\/p\u003e\n\u003cp\u003eIf you’ve ever heard a good tube amplifier and appreciated the way it seemed to make music feel more alive — a little fuller, a little smoother, a little less clinical — the WTX-Tubes is Advance Paris’s attempt to bring that character to wireless streaming. It sits between your phone and your hi-fi system and handles everything: Bluetooth reception, high-quality DAC conversion, tube amplification, and output to your amplifier’s analog or digital inputs.\u003c\/p\u003e\n\u003cp\u003eThe WTX-Tubes is not a network streamer. It doesn’t connect to Wi-Fi or stream from Spotify or Tidal on its own — that’s a different product (the WTX-StreamTubes). This is a Bluetooth receiver specifically, designed to take audio wirelessly from a device you’re already using and pass it to your hi-fi system with a tube-flavored analog signal.\u003c\/p\u003e\n\u003ch3\u003eThe Technology Inside — All Three Layers\u003c\/h3\u003e\n\u003cp\u003eAdvance Paris built the WTX-Tubes around three distinct technologies working together, and it’s worth understanding what each one does.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLayer 1: Bluetooth 5.0 with aptX HD.\u003c\/strong\u003e The heart of the wireless connection is a Qualcomm QCC Bluetooth 5.0 chipset that supports aptX HD — the high-resolution codec that streams at up to 24-bit\/48kHz. That’s meaningfully more detail than standard Bluetooth’s SBC compression. It also supports the standard aptX codec, AAC (for iPhones), and SBC for universal compatibility. A front-panel LED labeled HD DETECT lights up to confirm when an HD-quality codec is active, so you always know what quality level you’re getting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLayer 2: Wolfson WM8740 DAC with tri-core processing.\u003c\/strong\u003e Advance Paris chose not to use the built-in DAC inside the Qualcomm Bluetooth chip. Instead, they route the digital audio signal to a dedicated Wolfson WM8740 DAC — a 24-bit\/192kHz converter with 117 dB of dynamic range that Advance Paris selected specifically for its sonic character. Before that conversion happens, a tri-core processor (a 32-bit dual-core plus a 120 MHz single-core) handles timing and jitter correction — jitter being the tiny timing inconsistencies in digital audio that, if left unchecked, can make music sound harsh or vague. According to the Son-Vidéo.com review (Valentin Lefort, July 2021), this processor combination “ensures the correct timing of the data in order to optimize the precision of the information received by the DAC.”\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLayer 3: Class A tube output stage with Raytheon 5703 tubes.\u003c\/strong\u003e After the DAC converts the digital signal to analog, that analog signal passes through a pair of Raytheon 5703 subminiature vacuum tubes in a Class A configuration. Class A means the tubes are always conducting — they never switch off — which is the most linear and least distortion-prone way to run a tube circuit, though it requires more power and produces more heat. The 5703 is an American military-specification tube known for its reliability and consistent performance. According to Advance Paris, the tubes are mounted in insulating holders specifically to suppress microphonic effects (vibrations that can cause tubes to pick up and amplify noise) and to maintain a stable operating temperature.\u003c\/p\u003e\n\u003ch3\u003eWhat Do Reviewers Say?\u003c\/h3\u003e\n\u003cdiv class=\"ec-blockquote\"\u003e\n\u003cp\u003eValentin Lefort at Son-Vidéo.com reviewed the WTX-Tubes in July 2021, connecting it to a NAD C375 BEE amplifier with KEF LS50 Meta speakers, using both an iPhone 12 Pro Max (AAC codec) and iBasso\/FiiO Android DAPs (aptX HD). Lefort described the contribution of the tubes as “undeniable” compared to a more conventional receiver, noting more warmth and softness in the presentation. He reported the sound was “smoother and less metallic and cold” — qualities he described as common complaints with Bluetooth playback generally. He also noted the receiver was “quite impressive and managed to erase the flaws that hinder the reputation of Bluetooth transmission for music playback.” He did note that LDAC and LHDC codec support is absent, which would have allowed higher resolution than aptX HD in some cases. — \u003cem\u003eSon-Vidéo.com, Valentin Lefort, July 22, 2021\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eWifimedia (Netherlands) noted that Advance Paris deliberately bypasses the standard Qualcomm DAC in favor of the Wolfson WM8740 specifically for its sonic character, and that the optical and coaxial outputs allow users to connect to an external DAC if preferred. — \u003cem\u003eWifimedia.eu\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eWho Is This Best For?\u003c\/h3\u003e\n\u003cp\u003e\u003cimg class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/2714.svg\" alt=\"✔\" width=\"15\"\u003e You love streaming music from your phone but find Bluetooth audio too cold, flat, or digital-sounding — and you want to do something about it without rebuilding your entire system.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/2714.svg\" alt=\"✔\" width=\"15\"\u003e You already own a good integrated amplifier or stereo receiver and want to add a wireless source that sounds genuinely musical, not just adequate.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/2714.svg\" alt=\"✔\" width=\"15\"\u003e You’re a tube audio enthusiast curious about whether tube character can meaningfully improve wireless streaming — and you want to try it risk-free.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/2714.svg\" alt=\"✔\" width=\"15\"\u003e You use an Android phone or a device with aptX HD support and want to take full advantage of 24-bit wireless audio with a tube-warmed output.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/2714.svg\" alt=\"✔\" width=\"15\"\u003e You want a standalone receiver that looks distinctive on the shelf — the glowing tubes visible through the front panel are genuinely attractive.\u003c\/p\u003e\n\u003ch3\u003eHow Does It Connect to Your System?\u003c\/h3\u003e\n\u003cp\u003eThe WTX-Tubes offers three output options, giving you flexibility for most hi-fi setups.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003estereo RCA analog output\u003c\/strong\u003e is the primary connection for most users. You run a pair of RCA cables from the WTX-Tubes to any aux or line-level input on your integrated amplifier, stereo receiver, or preamplifier. This is where the tube stage outputs — so using this connection gives you the full tube-flavored sound the product is designed around.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eoptical (Toslink) and coaxial S\/PDIF digital outputs\u003c\/strong\u003e let you bypass the tube output stage entirely and send the decoded digital signal to a separate external DAC or to an amplifier with digital inputs. This is useful if you want to use your own preferred DAC, or if you want to A\/B the tube output against a clean digital signal to hear the difference.\u003c\/p\u003e\n\u003cp\u003eOn the input side, pairing is simple: power on the WTX-Tubes, wait for the PAIR LED to stabilize, select “WTX TUBES” in your device’s Bluetooth settings, and the CONNECTED indicator confirms the link. The HD DETECT LED on the front panel will illuminate if your source device is streaming in aptX or aptX HD.\u003c\/p\u003e\n\u003cp\u003eThe unit requires its included 12V\/1A power adapter and comes with a removable, rotatable external Bluetooth antenna.\u003c\/p\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAdvance Paris WTX-Tubes Bluetooth receiver\u003c\/li\u003e\n\u003cli\u003e12V \/ 1A power adapter (100–240V, 50\/60Hz)\u003c\/li\u003e\n\u003cli\u003eRemovable, rotatable Bluetooth antenna\u003c\/li\u003e\n\u003cli\u003eUser manual \/ quick-start guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: RCA interconnect cables and digital cables are not included. Verify exact packing contents with manufacturer or Audio Advisor prior to purchase.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003ePairs Well With\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Amplifiers\u003c\/strong\u003e — The WTX-Tubes connects to any integrated amplifier with an aux or line-level RCA input. Browse our \u003ca href=\"%%GLOBAL_ShopPathSSL%%\/integrated-amplifiers\"\u003eintegrated amplifier selection\u003c\/a\u003e for great pairings, including other Advance Paris models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStereo Preamplifiers\u003c\/strong\u003e — If you run a separate preamp and power amp, connect the WTX-Tubes to any line-level input on your \u003ca href=\"%%GLOBAL_ShopPathSSL%%\/preamplifiers\"\u003epreamplifier\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal DACs\u003c\/strong\u003e — The digital outputs (optical and coaxial) let you use the WTX-Tubes as a Bluetooth-to-digital bridge feeding your own \u003ca href=\"%%GLOBAL_ShopPathSSL%%\/digital-to-analog-converters\"\u003eDAC\u003c\/a\u003e for a different sonic character.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRCA Interconnect Cables\u003c\/strong\u003e — You’ll need a pair of RCA cables to connect to your amplifier. Explore our \u003ca href=\"%%GLOBAL_ShopPathSSL%%\/cat-cables\"\u003einterconnect cable selection\u003c\/a\u003e for options at every price point.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoudspeakers\u003c\/strong\u003e — Building a new system around the WTX-Tubes? Browse our \u003ca href=\"%%GLOBAL_ShopPathSSL%%\/loudspeakers\"\u003eloudspeaker collection\u003c\/a\u003e for bookshelf and floorstanding options that pair well with tube-warmed sources.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Specifications\u003c\/h2\u003e\n\u003ch3\u003eClass A Tube Output Stage — Genuine Raytheon 5703 Subminiature Tubes\u003c\/h3\u003e\n\u003cp\u003eTwo Raytheon 5703 American military-spec vacuum tubes handle the final analog output stage in a Class A configuration. Class A means the tubes are always active, which produces the most linear and lowest-distortion circuit topology available. According to Advance Paris, the tubes are mounted in insulating holders to suppress microphonic effects and maintain stable operating temperature. This is the feature that sets the WTX-Tubes apart from every other Bluetooth receiver at its price point.\u003c\/p\u003e\n\u003ch3\u003eWolfson WM8740 DAC — Chosen for Sound, Not Just Numbers\u003c\/h3\u003e\n\u003cp\u003eAdvance Paris bypasses the standard DAC inside the Qualcomm Bluetooth chip and routes audio to a dedicated Wolfson WM8740 converter — a 24-bit\/192kHz component with 117 dB of dynamic range. According to independent reviewer Valentin Lefort at Son-Vidéo.com (July 2021), this choice was made “because of its beautiful sound” rather than purely for spec reasons. The DAC receives its signal via an I²S bus after timing correction by the tri-core processor.\u003c\/p\u003e\n\u003ch3\u003eaptX HD Bluetooth for 24-Bit Wireless Audio\u003c\/h3\u003e\n\u003cp\u003eThe Qualcomm QCC Bluetooth 5.0 chipset supports aptX HD, which streams at up to 24-bit\/48kHz — well beyond CD resolution in bit depth. It also supports aptX, AAC (for iPhones and Apple devices), and universal SBC, so the WTX-Tubes works with any Bluetooth source. The front-panel HD DETECT LED confirms when a high-definition codec is active.\u003c\/p\u003e\n\u003ch3\u003eTri-Core Processor for Jitter Reduction\u003c\/h3\u003e\n\u003cp\u003eA 32-bit dual-core processor combined with a 120 MHz single-core processor handles precise timing of the incoming digital audio data before it reaches the DAC. This is designed to minimize jitter — the small timing errors in digital audio that can make music sound harsh or imprecise. According to reviewer Valentin Lefort (Son-Vidéo.com, July 2021), this architecture “ensures the correct timing of the data in order to optimize the precision of the information received by the DAC.”\u003c\/p\u003e\n\u003ch3\u003eFlexible Analog and Digital Outputs\u003c\/h3\u003e\n\u003cp\u003eThe WTX-Tubes offers stereo RCA analog output (through the tube stage), optical Toslink digital output, and coaxial S\/PDIF digital output. The digital outputs let you use the receiver as a Bluetooth bridge feeding an external DAC if you prefer to use your own conversion stage. This gives you options as your system evolves.\u003c\/p\u003e\n\u003ch3\u003eSolid Metal Chassis with Illuminated Front Panel\u003c\/h3\u003e\n\u003cp\u003eThe chassis is metal rather than the plastic commonly used in this product category. The front panel features tinted plexiglass through which the glowing Raytheon tubes are visible during operation — a genuinely attractive design detail. The compact 130 × 110 × 42 mm footprint fits easily in a rack, on a shelf, or on top of an amplifier.\u003c\/p\u003e\n\u003ch3\u003eQuick-Reference Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 0.92em; margin-top: 16px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd; width: 45%;\"\u003eBluetooth Version\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003e5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003eChipset\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003eQualcomm QCC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003eSupported Codecs\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003eaptX HD, aptX, AAC, SBC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003eMax Streaming Resolution\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003e24-bit \/ 48 kHz (aptX HD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003eDAC\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003eWolfson WM8740, 24-bit \/ 192 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003eDynamic Range\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003e117 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003eTubes\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003e2 × Raytheon 5703 subminiature vacuum tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003eTube Configuration\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003eClass A analog output stage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003eProcessing\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003eTri-core: dual-core 32-bit + single core 120 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003eOutputs\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003e1× stereo RCA (analog), 1× optical Toslink (digital), 1× coaxial S\/PDIF (digital)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003ePower Supply\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003eExternal adapter: 100–240V AC \/ 50–60Hz, 12V DC \/ 1A output (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003eAntenna\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003eExternal, removable and rotatable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003eChassis\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003eMetal with tinted plexiglass front panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: 600; border-bottom: 1px solid #ddd;\"\u003eDimensions (W × D × H)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #ddd;\"\u003e130 mm × 110 mm × 42 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"product-faq gsbp-ab3b28d\"\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003chr\u003e\n\u003ch3\u003eWhat do the tubes actually do — will they change the sound noticeably?\u003c\/h3\u003e\n\u003cp\u003eYes, according to both the manufacturer and independent reviewers. Reviewer Valentin Lefort at Son-Vidéo.com (July 2021) described the tube contribution as “undeniable,” noting that the WTX-Tubes sounded smoother, warmer, and less metallic than conventional Bluetooth receivers. Advance Paris describes the effect as music sounding more analog — “in the spirit of vinyl.” The tubes handle the final analog output stage, so their character is present whenever you use the RCA output. The digital outputs (optical and coaxial) bypass the tube stage if you want a cleaner, uncolored signal instead.\u003c\/p\u003e\n\u003ch3\u003eWhat is a Class A tube output stage, and why does it matter?\u003c\/h3\u003e\n\u003cp\u003eClass A means the tubes are conducting at all times — they never switch off between signal cycles the way Class B or Class AB circuits do. This continuous operation produces a more linear signal with lower distortion, at the cost of greater power consumption and heat. It’s widely regarded as the most musical and natural-sounding approach to tube circuit design. The WTX-Tubes uses this topology for its analog output stage, which is uncommon in a Bluetooth receiver at any price point.\u003c\/p\u003e\n\u003ch3\u003eDoes this work with my iPhone?\u003c\/h3\u003e\n\u003cp\u003eYes. iPhones use the AAC Bluetooth codec rather than aptX or aptX HD, and the WTX-Tubes supports AAC. You won’t get aptX HD resolution from an iPhone, but the AAC connection is solid — and the tube output stage adds its character regardless of the codec. To take full advantage of aptX HD (24-bit\/48kHz), you’ll need an Android phone or other device that explicitly supports aptX HD.\u003c\/p\u003e\n\u003ch3\u003eWhat does the HD DETECT LED tell me?\u003c\/h3\u003e\n\u003cp\u003eThe HD DETECT indicator on the front panel lights up when the WTX-Tubes receives an aptX or aptX HD Bluetooth signal from your source device. If it’s off, the connection is using AAC or SBC. It’s a useful at-a-glance indicator of what quality level your current connection is running, so you don’t have to guess.\u003c\/p\u003e\n\u003ch3\u003eCan I use this without the tube stage — just as a clean Bluetooth receiver?\u003c\/h3\u003e\n\u003cp\u003eYes. The optical and coaxial digital outputs bypass the tube output stage entirely, delivering the raw converted audio signal to an external DAC or a digital input on your amplifier. This gives you the flexibility to try both approaches — tubes via the RCA output and clean digital via the S\/PDIF outputs — and decide which you prefer with your own system.\u003c\/p\u003e\n\u003ch3\u003eHow does the WTX-Tubes differ from the WTX-StreamTubes?\u003c\/h3\u003e\n\u003cp\u003eThe WTX-Tubes is a Bluetooth-only receiver. It streams audio wirelessly from a Bluetooth source device (your phone, tablet, or computer). The WTX-StreamTubes is a full network streamer with Wi-Fi, Ethernet, Spotify, Qobuz, Tidal, and other built-in streaming services — plus an optional X-FTB01 or X-FTB02 Bluetooth dongle for Bluetooth input. Both use the same Raytheon 5703 tube output stage. If your primary use case is streaming from your phone, the WTX-Tubes is the simpler and more affordable choice. If you want to stream from Tidal or Qobuz directly without a phone in the loop, the WTX-StreamTubes is worth a look.\u003c\/p\u003e\n\u003ch3\u003eWhat else do I need to use the WTX-Tubes?\u003c\/h3\u003e\n\u003cp\u003eYou’ll need a Bluetooth-enabled source device (any phone, tablet, or computer) and a stereo amplifier, receiver, or preamplifier with an available line-level input. A pair of RCA interconnect cables to connect the WTX-Tubes to your amp are required but not included. The 12V power adapter is included. If you’d like help choosing cables or confirming compatibility with your system, give us a call at \u003ca href=\"tel:+18009420220\"\u003e800-942-0220\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eDo the tubes need to be replaced over time?\u003c\/h3\u003e\n\u003cp\u003eVacuum tubes are consumable components, but Raytheon 5703 subminiature tubes are known for their durability and long service life — they were originally developed to military specifications. Replacement tubes should be available from audio tube suppliers if needed down the road. If you have questions about tube maintenance or sourcing, give us a call and we’ll help you figure it out.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhy Buy from Audio Advisor?\u003c\/h2\u003e\n\u003cdiv class=\"ec-titlebox-text\"\u003e\n\u003cp\u003e\u003cimg class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/1f3b5.svg\" alt=\"music note emoji\" width=\"20\"\u003e  \u003cstrong\u003e40+ Years of Expertise\u003c\/strong\u003e — Since 1981, we’ve helped over a million music lovers find the right gear.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/1f504.svg\" alt=\"repeat emoji\" width=\"20\"\u003e  \u003cstrong\u003e60-Day Money-Back Guarantee\u003c\/strong\u003e — Take your time. Listen, enjoy, and make sure it’s right for you.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/1f4de.svg\" alt=\"phone emoji\" width=\"20\"\u003e  \u003cstrong\u003eReal Experts, Real Help\u003c\/strong\u003e — Our team is here to answer your questions at \u003ca href=\"tel:8009420220\"\u003e800-942-0220\u003c\/a\u003e, weekdays 9am–6pm EST.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/1f69a.svg\" alt=\"truck emoji\" width=\"20\"\u003e  \u003cstrong\u003eFree Shipping\u003c\/strong\u003e — On orders over $49, delivered to your door.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"emoji\" role=\"img\" draggable=\"false\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/1f4b3.svg\" alt=\"credit card emoji\" width=\"20\"\u003e  \u003cstrong\u003eFlexible Payment Options\u003c\/strong\u003e — Financing available so you can start listening now.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eWant to learn more about Bluetooth audio or vacuum tube gear? Visit our \u003ca href=\"https:\/\/learningcenter.audioadvisor.com\"\u003eLearning Center\u003c\/a\u003e for guides, tips, and expert advice.\u003c\/p\u003e","brand":"Advance Paris","offers":[{"title":"New","offer_id":45981216342189,"sku":"NEW-APWTXTUBES","price":599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/3708\/1773\/files\/APWTXTUBES_1_front_2026__67647.1776433765.1280.1280_59adbd5c-4203-4242-ade8-2496bee1d444.jpg?v=1778167503","url":"https:\/\/www.audioadvisor.com\/products\/advance-paris-wtxtubes-bluetooth-receiver-with-aptx-hd-and-analog-class-a-tube-output-stage","provider":"Audio Advisor","version":"1.0","type":"link"}