Marantz SR520 AM/FM Digital Synthesized Receiver Made In Japan in 1983-84. Recent DALAUDIO Service included new STK amp module (original impossible to find NOS). All controls, potentiometers, selectors and switches were serviced and a noise free. The compact unit packs 2x 40 Watts RMS @ 8 Ohms, and 68W @ 4 Ohms dynamic IHF. This is a nice affordable Marantz with the usual three tone controls and plenty of features. Overall the unit is in excellent condition. We can include a digital copy of the original service manual, and the catalog from 1983-84 the unit was featured in. A very nice sounding unit that utilizes the STK (2240) as did many well known period receivers including Pioneer SX series - The 16 pin STK2240 was sourced by DALAUDIO as is original (NOS) Sanyo part very difficult to find. This is a cash final sale, No Holds, Call or Text for Local Pick-Up Only, No shipping. Features: Controls: Tone - Bass/Medium/Treble, Low Filter (6dB/Oct), Tape Monitor, Speakers 1 and  2 Sources - Phono, CD/Aux, Tape In /Out, Antenna: AM IN / FM IN Tuning Presets: 8 AM / 8 FM THD: At rated output is .03% THD Specifications: Tuning range: FM, MW, LW Power output: 40 watts per channel into 8Ω (stereo) Frequency response: 10Hz to 35kHz Total harmonic distortion: 0.03% Damping factor: 50 Input sensitivity: 2.8mV (MM), 160mV (line) Signal to noise ratio: 90dB (MM) Dimensions: 16.4" x 4" x 12" Mfg: 1983-84