{"product_id":"demeter-amplification-hdi-1-direct-line-driver","title":"Demeter Amplification HDI-1 - Direct Line Driver","description":"\u003ch3\u003eA Versatile DI\u003c\/h3\u003e  \u003cp\u003eThe \u003cstrong\u003eDemeter Amplification HDI-1 - Direct Line Driver\u003c\/strong\u003e is a versatile new addition to the Demeter line of professional tube audio equipment. Demeter Amplification, the originator of the first commercially available Tube Direct Box has taken the technology to a new level with this innovative product incorporating the same tube driven ultra high impedance input (27 megohms) found in the original Tube Direct (to prevent instrument pickup loading) and a new balanced line level output section. The unit can be used as both line level direct instrument input or as a line level driver to add tube warmth to line level digital interfaces.\u003c\/p\u003e  \u003cp\u003eThe front panel features two independent channels, with separate 1\/4\" inputs, ground lift, phase preset, unity gain (+6 dB with balanced output) and a tube driven (cathode input plate output) boost mode with 20 dB of boost controlled by a continuously variable volume control and a unity gain low impedance tube driven output to drive external instrument amplifiers or effects. The rear panel features separate TRS and 3-pin connectors for each channel. As with all H series units, the power supply is fully regulated (for low noise) supplying 220 V B+ to the tubes. Hand built in the U.S.A. with the finest components available.\u003c\/p\u003e  \u003ch3\u003eSpecifications:\u003c\/h3\u003e  \u003cul\u003e \u003cli\u003eInput impedance: 27 megohms\u003c\/li\u003e \u003cli\u003eOutput impedance: 50 Ohms\u003c\/li\u003e \u003cli\u003eTHD @ 1 kHz: .035% unity, .081% boost\u003c\/li\u003e \u003cli\u003eBandwidth: 20 Hz to 20 kHz\u003c\/li\u003e \u003cli\u003eSignal to noise: - 98 dB\u003c\/li\u003e \u003cli\u003eGain: 20 dB\/unity\u003c\/li\u003e \u003cli\u003eOutput: @ 600 Ohms +28 dB\u003c\/li\u003e \u003cli\u003eTubes: 2 12AX7a\u003c\/li\u003e \u003cli\u003eOutputs: TRS 3-pin rear, 1\/4\" mono front\u003c\/li\u003e \u003cli\u003eOperating voltage: 230\/115 V AC\u003c\/li\u003e \u003c\/ul\u003e","brand":"Demeter Amplification","offers":[{"title":"Default Title","offer_id":44450035040359,"sku":"64334","price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/demeter-hdi-1_64334_1.jpg?v=1787091417","url":"https:\/\/vintageking.mom\/products\/demeter-amplification-hdi-1-direct-line-driver","provider":"Vintage King","version":"1.0","type":"link"}