Holton 101 R2 Zero Feedback Mono Bloc Pre-Amplifier Fully Assembled and Tested Two Pre-Amplifier Boards needed for Stereo. Holton Audio will be releasing a new fully discrete Full Class A MOSFET Pre-Amplifier (No Opamps) with selectable feedback topology that will enable the user to switch the feedback mode of both channels from the front panel and 3 modes of operation will be available. The 3 modes of operation will be Zero Feedback on the MOSFET Output Stage; 50% Feedback on Output Stage and Full Global Feedback for entire amplifier circuit. It will have is own fully discrete low noise low drop out regulated power supply on board and each main board is arranged in full mono block design, so two boards are required for stereo. Specifications THD +Noise 1khz Zero Feedback at 0db output 1.88 Volts RMS 0.006% THD +Noise driving a 2.2k Ohm load THD +Noise 1khz Full Global Feedback at 0dB output 1.88 Volts RMS0.0005% THD +Noise driving a 2.2k Ohm load0.00055% THD +Noise @ 10khz0.001% THD +Noise @ 20khz SNR -120dB at +6db output Unweighted Frequency Response 5hz - 500khz -1dB Voltage Gain 3.7 - 11.6dB Maximum output voltage 20 volts RMS - 55 volts Peak to Peak Full Complimentary MOSFET output stage Class A Bias level on output stage set @ 65 milliamps
