DENON PMA-520 STEREO INTEGRATED AMPLIFIER * JAPAN * TOROID POWER

CLEAN, SERVICED, ALL-ORIGINAL ELECTRONICS NO REPAIRS, WORKS LIKE NEW This Denon will be tested for local Ottawa area buyer at the front door with FM radio, CD player, turntable and vintage speakers. Can be shipped, keep reading. 1989, from Golden Era of Denon engineering; both circuit design and build quality are impeccable. Today's stereos of this price range (about CAD $1100 new with tax in 2026 loonies) are a pale shade of their former glory. The amplifier delivers ample power to drive even demanding, low-efficiency speakers. Its toroidal power supply provides strong current delivery, allowing it to handle low-impedance loads with ease while maintaining low distortion (THD and TIM) for clean, high-quality sound. Often praised for its “Advanced High-Current (HC) Single Push-Pull” circuit, which ensures excellent speed and dynamic response. It features a robust, minimalist design, a built-in phono stage, direct mechanical ground construction to reduce vibration. Able to perform reliably, offering detailed and refined audio output. Complete 2-hrs maintenance service done 06/2026: * Cleaned and detailed in and out; * All controls, potentiometers and connectors deoxed/lubed using pro grade D100/G5/F5 ($126/3 cans); * Bias voltages adjusted to 20mV L/R under load, for best sound quality and best performance, factory specs. The amp now runs lukewarm as it should, not hot, not cold. * The DC offset is below 10 mV, L/R. * All functions tested, work perfectly well. * Oversized heavy duty Nippon Makisen Toroidal Power Transformer * Premium Power transistors: Sanken (2SA1491+2SC3855) X 2 pairs * Premium Nippon Chemicon capacitors * Use of link cable for Tape Monitor switch, for shorter signal path * Protection: DC relay and 5A fuse * Pure Current Power Supply with high dynamic power * Optical transfer Class-A circuit amplification * Denon's original Double Super Non-NFB DC Power Amplifier for extremely pure high-speed amplification (Dual Super Non-Negative Feedback circuit) (completely separating the power amplification stage into voltage amplification and power amplification stages) * Zero Negative Feedback and Near Zero Global Feedback * High Power Low Impedance Capability * Phono input with MM/MC front switch * Multiple Line inputs: CD, Tuner, Aux1, Aux2, Tape1 Loop, Tape2 Loop * Recording Monitor Switch: Tape 1-2, Tape 2-1, Off * Speaker outputs: A, B, A+B, Off * Headphones jack * Loudness * Subsonic filter * 3 extra power outlets: 2 switched, 1 unswitched SPECS (directly from service manual): * Rated Power Output RMS: 70 + 70 Watts (into 8 Ohms) * Rated Power Output DIN: 110 + 110 Watts (into 4 Ohms) * Frequency response: 20Hz to 20kHz * THD: 0.015% * IMD: 0.008% * Input sensitivity: 0.2mV (MC), 2.5mV (MM), 150mV (line) * SNR: 68dB (MC), 88dB (MM), 105dB (line) * Output: 150mV (line) * Dimensions: 434 x 140 x 343mm * Net Weight: 7.4 KG LINKS: https://www.hifiengine.com/manual_library/denon/pma-520.shtml OM: https://archive.org/details/manual_PMA520_OM_DENON_EN SM: https://elektrotanya.com/denon_pma_520_720.pdf/download.html ****************************************************************************************** Local buyer much preferred, cash, pick up in Orleans; I will ship in Canada if paid by Interac e-transfer, packed nicely with PP foam/styrofoam, insured and tracked. Shipping costs: $37 ON/QC, $49 to Alberta, $55 to BC Pickup or shipping only, no deliveries. I've been collecting vintage stereos for a long time, so trades/trade-ins, old receiver, amplifier, CD player, speakers, turntable, EQ, cassette deck, etc in any condition will be considered. SERIOUS BUYER ONLY - SEND CELL PHONE NUMBER WHEN READY TO BUY See my other ads - Thank you!