{"product_id":"xduoo-mt-04-balanced-tube-headphone-amplifier","title":"xDuoo MT-04 Balanced Tube Headphone Amplifier","description":"\u003ch1\u003e\u003cstrong\u003eClass-A Tube amp with two gain settings\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe MT-04 is a balanced hybrid headphone amplifier that pairs two 6H3 vacuum tubes with a transistor-based Class A output stage. Its tube pre-amplification stage lends warmth and body to vocals, while the transistor stage provides the current necessary for headphones. Balanced and single-ended connections, two gain settings, and up to 2200mW into 32Ω give it flexibility across a range of headphones.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eA hybrid approach to headphone amplification\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe MT-04 assigns preamplification to vacuum tubes and power amplification to transistors. This architecture combines the tonal character of tubes with the drive and control of a solid-state output stage, supporting full vocals, responsive bass, and clear musical detail.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eTwo 6H3 tubes for a warmer presentation\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eTwo 6H3 vacuum tubes shape the signal before it reaches the power stage. Their presentation emphasizes smooth vocals, a full midrange, and delicate treble, giving voices and instruments a sense of body.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eClass A output with up to 2200mW\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe transistor-based Class A stage delivers up to 2200mW into 32Ω through the balanced headphone output and 1800mW into 32Ω through the single-ended output. It provides fast transient response and bass control to help preserve definition as arrangements become more demanding.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eBalanced and single-ended connections\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eConnect your source through RCA, balanced XLR, or balanced 4.4mm inputs. On the front panel, balanced 4.4mm and 1\/4-inch (6.35mm) single-ended headphone outputs accommodate two common cable terminations. The balanced output offers a specified 125dB signal-to-noise ratio and 85dB crosstalk performance.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eTwo gain settings within reach\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eA front-panel switch selects between +12dB and +18dB gain. Choose the setting that suits your headphones’ sensitivity and your source’s output level, then adjust listening volume with the rotary control.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAudio-grade capacitors\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eELNA audio coupling capacitors and Rubycon filter capacitors serve the signal and power circuits. These components support the amplifier’s coupling and filtering requirements.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAn external ground connection\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eA rear-panel ground terminal provides an external grounding point to help reduce static interference and hum associated with ungrounded enclosures.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eDelayed startup and circuit protection\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eA relay protection circuit introduces a 30-second power-on delay to allow the tubes to warm up before listening. It also suppresses switching pops and automatically cuts power in response to overload or short-circuit conditions to help protect the amplifier and connected headphones.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eA clear view of the circuitry\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe aluminum alloy enclosure provides structural strength and electromagnetic shielding. Clear acrylic front and rear panels reveal the internal components, with the two vacuum tubes visible above the circuit board.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHybrid tube-transistor headphone amplifier\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTwo 6H3 vacuum tubes for preamplification\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTransistor-based Class A output stage\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eUp to 2200mW balanced output into 32Ω\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRCA, balanced XLR, and balanced 4.4mm inputs\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBalanced 4.4mm and single-ended 1\/4-inch (6.35mm) headphone outputs\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSelectable +12dB and +18dB gain\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eELNA coupling capacitors and Rubycon filter capacitors\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExternal ground terminal\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e30-second startup delay with overload and short-circuit protection\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAluminum alloy body with clear acrylic front and rear panels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eModel: MT-04\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAmplifier architecture: Hybrid tube-transistor\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput stage: Class A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVacuum tubes: 2 × 6H3\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePower supply: 12V DC, 2A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInputs: RCA analog, balanced XLR, balanced 4.4mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeadphone outputs: Balanced 4.4mm, single-ended 1\/4-inch (6.35mm)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFrequency response: 10Hz–60kHz (±0.5dB)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGain: +12dB \/ +18dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDimensions: 5.35 × 4.33 × 3.19 inches (13.6 × 11.0 × 8.1cm)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWeight: Approximately 1.34lb (0.61kg)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"font-size: 0.875rem;\"\u003eSingle-ended headphone output\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eOutput power at 32Ω: 1800mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput power at 75Ω: 1000mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput power at 150Ω: 650mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput power at 300Ω: 330mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput power at 600Ω: 165mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCrosstalk: 76dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSNR: 118dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTHD: 0.1% (-60dB)\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced headphone output\u003c\/strong\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003eOutput power at 32Ω: 2200mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput power at 75Ω: 1200mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput power at 150Ω: 800mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput power at 300Ω: 400mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput power at 600Ω: 200mW\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCrosstalk: 85dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSNR: 125dB\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTHD: 0.08% (-62dB)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat’s included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePackage contents were not specified in the supplied product information.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"xDuoo","offers":[{"title":"Default Title","offer_id":67854751564012,"sku":"APS-1464-1","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/IMG_3746.jpg?v=1792767800","url":"https:\/\/apos.audio\/products\/xduoo-mt-04-balanced-tube-headphone-amplifier","provider":"Apos","version":"1.0","type":"link"}