Styroflex and tantalum capacitors have been used throughout. A useful all discrete class A hi 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. The 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.
This makes your 500 series enclosure´s power supply healthier and makes the 73JR independent of the rest of the slots. Microphone 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. Line input impedance: 10K Ohms bridging, transformer balanced and floating.
DI input impedance: Greater than 2 Megohms, unbalanced. Output impedance: Less than 75 Ohms, transformer balanced and floating, to drive a load of 600 ohms (factory terminated). Maximum output: Greater than +26dBu into 600 ohms. THD: Less than 0.025% at 1 Khz, less than 0.05% at 100Hz. Frequency response: 20Hz (+0.3dB) to 20Khz (-0.2dB) Maximum gain: Slightly greater than 80dB Noise: Less than -100dBu.The item "HERITAGE AUDIO 73JR 1073 STYLE PRE EXCELLENT CONDITION" is in sale since Sunday, March 28, 2021. This item is in the category "Musical Instruments\Pro Audio Equipment\Preamps". The seller is "seanharg" and is located in London. This item can be shipped to United Kingdom, Antigua and barbuda, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Bahrain, Canada, Japan, New Zealand, China, Israel, Hong Kong, Norway, Malaysia, Mexico, Singapore, South Korea, Switzerland, Thailand, Bangladesh, Belize, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Dominica, Egypt, Guernsey, Gibraltar, Guadeloupe, Grenada, French guiana, Iceland, Jersey, Jordan, Cambodia, Saint kitts and nevis, Saint lucia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Montserrat, Martinique, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Turks and caicos islands, Aruba, Saudi arabia, South africa, United arab emirates, Ukraine, Chile, Bahamas, Colombia, Costa rica, Dominican republic, Kuwait, Panama, Qatar, Trinidad and tobago, Uruguay.