RETRO Instruments / 500PRE

This is an API500 format preamplifier that uses Sta-Level circuit topology.

■Main Features
・API500 format preamp with Sta-Level circuit topology
・3-tube gain stage for deep and detailed sound
・Distortion-free, noiseless frequency response provides high-quality, musical performance

■Specifications
・Front Panel Controls: Input Level, Gain Select (two or three stage amplifier), ・Phantom Power, Polarity, and Output Level.
・Input and Output Connections: On edge card connector for 500 rack XLR.
・Gain: 48 dB (low gain two stage topology) 76 dB (high gain three stage topology)
・Total Harmonic Distortion: <.05% at +4 dBu output from 20-20000 Hz.
・Frequency Response: +/- .25 dB from 20-20000 Hz
・EIN: -128 dB (150 Ohm terminated)
・Typical Output Level: +4 dBu
・Output Clipping Level: Tube limiting Threshold +18 dBu, +24 dBu clipping headroom.
・Input Level Range: -72 dBu to +12 dBu
・Input impedance: >1000 Ohms from 20-20000 Hz.
・Output Impedance: 600 Ohms Transformer Balanced.
・Power Consumption: +/-16 Volts 155 ma. 48 Volts 3 ma.
・Weight: 2 lbs 7 oz.