{"product_id":"heritage-audio-73jr-demo-deal","title":"Heritage Audio 73JR (Demo Deal)","description":"\u003cp\u003eThe \u003cstrong\u003eHeritage Audio 73JR\u003c\/strong\u003e is true 1073 style mic preamp in a single 500 series slot with some added features that will cover all the recording needs for engineers and musicians who require EQ. Employing only discrete circuitry and conventional components, the 73JR is a faithful 3-stage all class A 1073 preamp. Styroflex and tantalum capacitors have been used throughout.  No corners were cut.\u003c\/p\u003e  \u003cp\u003eA useful all discrete Class A high-pass filter has been added, essential for recording everything with the exception of probably kick drum and and bass. The Line mode allows for reamping of prerecorded tracks and it's perfect for adding some Class A color to lifeless recordings.\u003c\/p\u003e  \u003cp\u003eThe smart switched DI (automatically switches from MIC to DI mode when inserting a MONO ¼” jack) is an all-discrete Class A JFET circuit ahead of the MIC transformer, so all the juice is there. Since its introduction in 2013, it has become a classic DI for bass.\u003c\/p\u003e  \u003cp\u003eFinally, special care has been taken with power handling, implementing internal +24 V slow turn on regulation (about 20 seconds to reach full voltage). This makes your 500 series enclosure's power supply healthier and makes the 73JR independent from the rest of the slots.\u003c\/p\u003e  \u003ch3\u003eSpecifications:\u003c\/h3\u003e  \u003cul\u003e \u003cli\u003eMicrophone input impedance: HI, 1200 Ohm minimum, LO, 300 Ohm minimum, higher gain positions gradually have greater impedances, optimum for lo gain ribbon mics, input is transformer balanced and floating\u003c\/li\u003e \u003cli\u003eLine input impedance: 10 kOhms bridging, transformer balanced and floating\u003c\/li\u003e \u003cli\u003eDI input impedance: Greater than 2 Megohms, unbalanced\u003c\/li\u003e \u003cli\u003eOutput impedance: Less than 75 Ohms, transformer balanced and floating, to drive a load of 600 ohms (factory terminated)\u003c\/li\u003e \u003cli\u003eMaximum output: Greater than +26 dBu into 600 ohms\u003c\/li\u003e \u003cli\u003eTHD: Less than 0.025% at 1 kHz, less than 0.05% at 100 Hz\u003c\/li\u003e \u003cli\u003eFrequency response: 20 Hz (+0.3 dB) to 20 kHz (-0.2 dB)\u003c\/li\u003e \u003cli\u003eMaximum gain: Slightly greater than 80 dB\u003c\/li\u003e \u003cli\u003eNoise: Less than -100 dBu\u003c\/li\u003e \u003cli\u003ePower consumption: 88 mA per rail @±16 VDC\u003c\/li\u003e \u003c\/ul\u003e","brand":"Heritage Audio","offers":[{"title":"Default Title","offer_id":44450600812647,"sku":"125287","price":759.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/heritage-audio-73jr_103903_1_1_f2d7a297-58e9-43f1-ba95-cafc3183bd43.jpg?v=1787093710","url":"https:\/\/vintageking.mom\/products\/heritage-audio-73jr-demo-deal","provider":"Vintage King","version":"1.0","type":"link"}