Brand: Heritage AudioDescription from Woodbrass : 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 Carnhill transformer balanced and floating. Line input impedance: 10K Ohms bridging, Carnhill transformer balanced and floating. DI input impedance: Greater than 2 Megohms, unbalanced. Output impedance: Less than 75 Ohms, Carnhill transformer balanced and floating, to drive a load of 600 ohms (factory terminated). Maximum output: Greater than 26dBm 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 -100dBm.
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